Annotation of src/lib/libc/time/NEWS, Revision 1.29
1.1 christos 1: News for the tz database
2:
1.29 ! christos 3: Release 2019b - 2019-07-01 00:09:53 -0700
! 4:
! 5: Briefly:
! 6: Brazil no longer observes DST.
! 7: 'zic -b slim' outputs smaller TZif files; please try it out.
! 8: Palestine's 2019 spring-forward transition was on 03-29, not 03-30.
! 9:
! 10: Changes to future timestamps
! 11:
! 12: Brazil has canceled DST and will stay on standard time indefinitely.
! 13: (Thanks to Steffen Thorsen, Marcus Diniz, and Daniel Soares de
! 14: Oliveira.)
! 15:
! 16: Predictions for Morocco now go through 2087 instead of 2037, to
! 17: work around a problem on newlib when using TZif files output by
! 18: zic 2019a or earlier. (Problem reported by David Gauchard.)
! 19:
! 20: Changes to past and future timestamps
! 21:
! 22: Palestine's 2019 spring transition was 03-29 at 00:00, not 03-30
! 23: at 01:00. (Thanks to Sharef Mustafa and Even Scharning.) Guess
! 24: future transitions to be March's last Friday at 00:00.
! 25:
! 26: Changes to past timestamps
! 27:
! 28: Hong Kong's 1941-06-15 spring-forward transition was at 03:00, not
! 29: 03:30. Its 1945 transition from JST to HKT was on 11-18 at 02:00,
! 30: not 09-15 at 00:00. In 1946 its spring-forward transition was on
! 31: 04-21 at 00:00, not the previous day at 03:30. From 1946 through
! 32: 1952 its fall-back transitions occurred at 04:30, not at 03:30.
! 33: In 1947 its fall-back transition was on 11-30, not 12-30.
! 34: (Thanks to P Chan.)
! 35:
! 36: Changes to past time zone abbreviations
! 37:
! 38: Italy's 1866 transition to Rome Mean Time was on December 12, not
! 39: September 22. This affects only the time zone abbreviation for
! 40: Europe/Rome between those dates. (Thanks to Stephen Trainor and
! 41: Luigi Rosa.)
! 42:
! 43: Changes affecting metadata only
! 44:
! 45: Add info about the Crimea situation in zone1970.tab and zone.tab.
! 46: (Problem reported by Serhii Demediuk.)
! 47:
! 48: Changes to code
! 49:
! 50: zic's new -b option supports a way to control data bloat and to
! 51: test for year-2038 bugs in software that reads TZif files.
! 52: 'zic -b fat' and 'zic -b slim' generate larger and smaller output;
! 53: for example, changing from fat to slim shrinks the Europe/London
! 54: file from 3648 to 1599 bytes, saving about 56%. Fat and slim
! 55: files represent the same set of timestamps and use the same TZif
! 56: format as documented in tzfile(5) and in Internet RFC 8536.
! 57: Fat format attempts to work around bugs or incompatibilities in
! 58: older software, notably software that mishandles 64-bit TZif data
! 59: or uses obsolete TZ strings like "EET-2EEST" that lack DST rules.
! 60: Slim format is more efficient and does not work around 64-bit bugs
! 61: or obsolete TZ strings. Currently zic defaults to fat format
! 62: unless you compile with -DZIC_BLOAT_DEFAULT=\"slim\"; this
! 63: out-of-the-box default is intended to change in future releases
! 64: as the buggy software often mishandles timestamps anyway.
! 65:
! 66: zic no longer treats a set of rules ending in 2037 specially.
! 67: Previously, zic assumed that such a ruleset meant that future
! 68: timestamps could not be predicted, and therefore omitted a
! 69: POSIX-like TZ string in the TZif output. The old behavior is no
! 70: longer needed for current tzdata, and caused problems with newlib
! 71: when used with older tzdata (reported by David Gauchard).
! 72:
! 73: zic no longer generates some artifact transitions. For example,
! 74: Europe/London no longer has a no-op transition in January 1996.
! 75:
! 76: Changes to build procedure
! 77:
! 78: tzdata.zi now assumes zic 2017c or later. This shrinks tzdata.zi
! 79: by a percent or so.
! 80:
! 81: Changes to documentation and commentary
! 82:
! 83: The Makefile now documents the POSIXRULES macro as being obsolete,
! 84: and similarly, zic's -p POSIXRULES option is now documented as
! 85: being obsolete. Although the POSIXRULES feature still exists and
! 86: works as before, in practice it is rarely used for its intended
! 87: purpose, and it does not work either in the default reference
! 88: implementation (for timestamps after 2037) or in common
! 89: implementations such as GNU/Linux (for contemporary timestamps).
! 90: Since POSIXRULES was designed primarily as a temporary transition
! 91: facility for System V platforms that died off decades ago, it is
! 92: being decommissioned rather than institutionalized.
! 93:
! 94: New info on Bonin Islands and Marcus (thanks to Wakaba and Phake Nick).
! 95:
! 96:
! 97: Release 2019a - 2019-03-25 22:01:33 -0700
1.28 christos 98:
99: Briefly:
100: Palestine "springs forward" on 2019-03-30 instead of 2019-03-23.
101: Metlakatla "fell back" to rejoin Alaska Time on 2019-01-20 at 02:00.
102:
103: Changes to past and future timestamps
104:
105: Palestine will not start DST until 2019-03-30, instead of 2019-03-23 as
106: previously predicted. Adjust our prediction by guessing that spring
107: transitions will be between 24 and 30 March, which matches recent practice
108: since 2016. (Thanks to Even Scharning and Tim Parenti.)
109:
110: Metlakatla ended its observance of Pacific standard time,
111: rejoining Alaska Time, on 2019-01-20 at 02:00. (Thanks to Ryan
112: Stanley and Tim Parenti.)
113:
114: Changes to past timestamps
115:
116: Israel observed DST in 1980 (08-02/09-13) and 1984 (05-05/08-25).
117: (Thanks to Alois Treindl and Isaac Starkman.)
118:
119: Changes to time zone abbreviations
120:
121: Etc/UCT is now a backward-compatibility link to Etc/UTC, instead
122: of being a separate zone that generates the abbreviation "UCT",
123: which nowadays is typically a typo. (Problem reported by Isiah
124: Meadows.)
125:
126: Changes to code
127:
128: zic now has an -r option to limit the time range of output data.
129: For example, 'zic -r @1000000000' limits the output data to
130: timestamps starting 1000000000 seconds after the Epoch.
131: This helps shrink output size and can be useful for applications
132: not needing the full timestamp history, such as TZDIST truncation;
133: see Internet RFC 8536 section 5.1. (Inspired by a feature request
134: from Christopher Wong, helped along by bug reports from Wong and
135: from Tim Parenti.)
136:
137: Changes to documentation
138:
139: Mention Internet RFC 8536 (February 2019), which documents TZif.
140:
141: tz-link.html now cites tzdata-meta
142: <https://tzdata-meta.timtimeonline.com/>.
143:
144:
1.27 christos 145: Release 2018i - 2018-12-30 11:05:43 -0800
146:
147: Briefly:
148: São Tomé and Príncipe switches from +01 to +00 on 2019-01-01.
149:
150: Changes to future timestamps
151:
152: Due to a change in government, São Tomé and Príncipe switches back
153: from +01 to +00 on 2019-01-01 at 02:00. (Thanks to Vadim
154: Nasardinov and Michael Deckers.)
155:
156:
157: Release 2018h - 2018-12-23 17:59:32 -0800
158:
159: Briefly:
160: Qyzylorda, Kazakhstan moved from +06 to +05 on 2018-12-21.
161: New zone Asia/Qostanay because Qostanay, Kazakhstan didn't move.
162: Metlakatla, Alaska observes PST this winter only.
163: Guess Morocco will continue to adjust clocks around Ramadan.
164: Add predictions for Iran from 2038 through 2090.
165:
166: Changes to future timestamps
167:
168: Guess that Morocco will continue to fall back just before and
169: spring forward just after Ramadan, the practice since 2012.
170: (Thanks to Maamar Abdelkader.) This means Morocco will observe
171: negative DST during Ramadan in main and vanguard formats, and in
172: rearguard format it stays in the +00 timezone and observes
173: ordinary DST in all months other than Ramadan. As before, extend
174: this guesswork to the year 2037. As a consequence, Morocco is
175: scheduled to observe three DST transitions in some Gregorian years
176: (e.g., 2033) due to the mismatch between the Gregorian and Islamic
177: calendars.
178:
179: The table of exact transitions for Iranian DST has been extended.
180: It formerly cut off before the year 2038 in a nod to 32-bit time_t.
181: It now cuts off before 2091 as there is doubt about how the Persian
182: calendar will treat 2091. This change predicts DST transitions in
183: 2038-9, 2042-3, and 2046-7 to occur one day later than previously
184: predicted. As before, post-cutoff transitions are approximated.
185:
186: Changes to past and future timestamps
187:
188: Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to
189: +05 on 2018-12-21. This is a zone split as Qostanay (aka
190: Kostanay) did not switch, so create a zone Asia/Qostanay.
191:
192: Metlakatla moved from Alaska to Pacific standard time on 2018-11-04.
193: It did not change clocks that day and remains on -08 this winter.
194: (Thanks to Ryan Stanley.) It will revert to the usual Alaska
195: rules next spring, so this change affects only timestamps
196: from 2018-11-04 through 2019-03-10.
197:
198: Change to past timestamps
199:
200: Kwajalein's 1993-08-20 transition from -12 to +12 was at 24:00,
201: not 00:00. I transcribed the time incorrectly from Shanks.
202: (Thanks to Phake Nick.)
203:
204: Nauru's 1979 transition was on 02-10 at 02:00, not 05-01 at 00:00.
205: (Thanks to Phake Nick.)
206:
207: Guam observed DST irregularly from 1959 through 1977.
208: (Thanks to Phake Nick.)
209:
210: Hong Kong observed DST in 1941 starting 06-15 (not 04-01), then on
211: 10-01 changed standard time to +08:30 (not +08). Its transition
212: back to +08 after WWII was on 1945-09-15, not the previous day.
213: Its 1904-10-30 change took effect at 01:00 +08 (not 00:00 LMT).
214: (Thanks to Phake Nick, Steve Allen, and Joseph Myers.) Also,
215: its 1952 fallback was on 11-02 (not 10-25).
216:
217: This release contains many changes to timestamps before 1946 due
218: to Japanese possession or occupation of Pacific/Chuuk,
219: Pacific/Guam, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro,
220: Pacific/Nauru, Pacific/Palau, and Pacific/Pohnpei.
221: (Thanks to Phake Nick.)
222:
223: Assume that the Spanish East Indies was like the Philippines and
224: observed American time until the end of 1844. This affects
225: Pacific/Chuuk, Pacific/Kosrae, Pacific/Palau, and Pacific/Pohnpei.
226:
227: Changes to past tm_isdst flags
228:
229: For the recent Morocco change, the tm_isdst flag should be 1 from
230: 2018-10-27 00:00 to 2018-10-28 03:00. (Thanks to Michael Deckers.)
231: Give a URL to the official decree. (Thanks to Matt Johnson.)
232:
233:
1.26 christos 234: Release 2018g - 2018-10-26 22:22:45 -0700
235:
236: Briefly:
1.27 christos 237: Morocco switches to permanent +01 on 2018-10-28.
1.26 christos 238:
239: Changes to future timestamps
240:
1.27 christos 241: Morocco switches from +00/+01 to permanent +01 effective 2018-10-28,
242: so its clocks will not fall back as previously scheduled.
1.26 christos 243: (Thanks to Mohamed Essedik Najd and Brian Inglis.)
244:
245: Changes to code
246:
247: When generating TZif files with leap seconds, zic no longer uses a
248: format that trips up older 32-bit clients, fixing a bug introduced
249: in 2018f. (Reported by Daniel Fischer.) Also, the zic workaround
250: for QTBUG-53071 now also works for TZif files with leap seconds.
251:
252: The translator to rearguard format now rewrites the line
253: "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to
254: "Rule Japan 1948 1951 - Sep Sun>=9 1:00 0 S".
255: This caters to zic before 2007 and to Oracle TZUpdater 2.2.0
256: and earlier. (Reported by Christos Zoulas.)
257:
258: Changes to past time zone abbreviations
259:
260: Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii.
261: This reverts to 2011h, as the abbreviation change in 2011i was
262: likely inadvertent.
263:
264: Changes to documentation
265:
266: tzfile.5 has new sections on interoperability issues.
267:
268:
1.25 christos 269: Release 2018f - 2018-10-18 00:14:18 -0700
270:
271: Briefly:
272: Volgograd moves from +03 to +04 on 2018-10-28.
273: Fiji ends DST 2019-01-13, not 2019-01-20.
274: Most of Chile changes DST dates, effective 2019-04-06.
275:
276: Changes to future timestamps
277:
278: Volgograd moves from +03 to +04 on 2018-10-28 at 02:00.
279: (Thanks to Alexander Fetisov and Stepan Golosunov.)
280:
281: Fiji ends DST 2019-01-13 instead of the 2019-01-20 previously
282: predicted. (Thanks to Raymond Kumar.) Adjust future predictions
283: accordingly.
284:
285: Most of Chile will end DST on the first Saturday in April at 24:00 mainland
286: time, and resume DST on the first Saturday in September at 24:00 mainland
287: time. The changes are effective from 2019-04-06, and do not affect the
288: Magallanes region modeled by America/Punta_Arenas. (Thanks to Juan Correa
289: and Tim Parenti.) Adjust future predictions accordingly.
290:
291: Changes to past timestamps
292:
293: The 2018-05-05 North Korea 30-minute time zone change took place
294: at 23:30 the previous day, not at 00:00 that day.
295:
296: China's 1988 spring-forward transition was on April 17, not
297: April 10. Its DST transitions in 1986/91 were at 02:00, not 00:00.
298: (Thanks to P Chan.)
299:
300: Fix several issues for Macau before 1992. Macau's pre-1904 LMT
301: was off by 10 s. Macau switched to +08 in 1904 not 1912, and
302: temporarily switched to +09/+10 during World War II. Macau
303: observed DST in 1942/79, not 1961/80, and there were several
304: errors for transition times and dates. (Thanks to P Chan.)
305:
306: The 1948-1951 fallback transitions in Japan were at 25:00 on
307: September's second Saturday, not at 24:00. (Thanks to Phake Nick.)
308: zic turns this into 01:00 on the day after September's second
309: Saturday, which is the best that POSIX or C platforms can do.
310:
311: Incorporate 1940-1949 Asia/Shanghai DST transitions from a 2014
312: paper by Li Yu, replacing more-questionable data from Shanks.
313:
314: Changes to time zone abbreviations
315:
316: Use "PST" and "PDT" for Philippine time. (Thanks to Paul Goyette.)
317:
318: Changes to code
319:
320: zic now always generates TZif files where time type 0 is used for
321: timestamps before the first transition. This simplifies the
322: reading of TZif files and should not affect behavior of existing
323: TZif readers because the same set of time types is used; only
324: their internal indexes may have changed. This affects only the
325: legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and
326: EET, which previously used nonzero types for these timestamps.
327:
328: Because of the type 0 change, zic no longer outputs a dummy
329: transition at time -2**59 (before the Big Bang), as clients should
330: no longer need this to handle historical timestamps correctly.
331: This reverts a change introduced in 2013d and shrinks most TZif
332: files by a few bytes.
333:
334: zic now supports negative time-of-day in Rule and Leap lines, e.g.,
335: "Rule X min max - Apr lastSun -6:00 1:00 -" means the transition
336: occurs at 18:00 on the Saturday before the last Sunday in April.
337: This behavior was documented in 2018a but the code did not
338: entirely match the documentation.
339:
340: localtime.c no longer requires at least one time type in TZif
341: files that lack transitions or have a POSIX-style TZ string. This
342: future-proofs the code against possible future extensions to the
343: format that would allow TZif files with POSIX-style TZ strings and
344: without transitions or time types.
345:
346: A read-access subscript error in localtime.c has been fixed.
347: It could occur only in TZif files with timecnt == 0, something that
348: does not happen in practice now but could happen in future versions.
349:
350: localtime.c no longer ignores TZif POSIX-style TZ strings that
351: specify only standard time. Instead, these TZ strings now
352: override the default time type for timestamps after the last
1.27 christos 353: transition (or for all timestamps if there are no transitions),
1.25 christos 354: just as DST strings specifying DST have always done.
355:
356: leapseconds.awk now outputs "#updated" and "#expires" comments,
357: and supports leap seconds at the ends of months other than June
358: and December. (Inspired by suggestions from Chris Woodbury.)
359:
360: Changes to documentation
361:
362: New restrictions: A Rule name must start with a character that
363: is neither an ASCII digit nor "-" nor "+", and an unquoted name
364: should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~".
365: The latter restriction makes room for future extensions (a
366: possibility noted by Tom Lane).
367:
368: tzfile.5 now documents what time types apply before the first and
369: after the last transition, if any.
370:
371: Documentation now uses the spelling "timezone" for a TZ setting
372: that determines timestamp history, and "time zone" for a
373: geographic region currently sharing the same standard time.
374:
375: The name "TZif" is now used for the tz binary data format.
376:
377: tz-link.htm now mentions the A0 TimeZone Migration utilities.
378: (Thanks to Aldrin Martoq for the link.)
379:
380: Changes to build procedure
381:
382: New 'make' target 'rearguard_tarballs' to build the rearguard
383: tarball only. This is a convenience on platforms that lack lzip
384: if you want to build the rearguard tarball. (Problem reported by
385: Deborah Goldsmith.)
386:
387: tzdata.zi is now more stable from release to release. (Problem
388: noted by Tom Lane.) It is also a bit shorter.
389:
390: tzdata.zi now can contain comment lines documenting configuration
391: information, such as which data format was selected, which input
392: files were used, and how leap seconds are treated. (Problems
393: noted by Lester Caine and Brian Inglis.) If the Makefile defaults
394: are used these comment lines are absent, for backward
395: compatibility. A redistributor intending to alter its copy of the
396: files should also append "-LABEL" to the 'version' file's first
397: line, where "LABEL" identifies the redistributor's change.
398:
399:
1.24 christos 400: Release 2018e - 2018-05-01 23:42:51 -0700
401:
402: Briefly:
403:
404: North Korea switches back to +09 on 2018-05-05.
405: The main format uses negative DST again, for Ireland etc.
406: 'make tarballs' now also builds a rearguard tarball.
407: New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines.
408:
1.25 christos 409: Changes to past and future timestamps
1.24 christos 410:
411: North Korea switches back from +0830 to +09 on 2018-05-05.
412: (Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon,
413: and Tim Parenti.)
414:
415: Bring back the negative-DST changes of 2018a, except be more
416: compatible with data parsers that do not support negative DST.
1.25 christos 417: Also, this now affects historical timestamps in Namibia and the
1.24 christos 418: former Czechoslovakia, not just Ireland. The main format now uses
1.25 christos 419: negative DST to model timestamps in Europe/Dublin (from 1971 on),
1.24 christos 420: Europe/Prague (1946/7), and Africa/Windhoek (1994/2017). This
421: does not affect UT offsets, only time zone abbreviations and the
422: tm_isdst flag. Also, this does not affect rearguard or vanguard
423: formats; effectively the main format now uses vanguard instead of
424: rearguard format. Data parsers that do not support negative DST
425: can still use data from the rearguard tarball described below.
426:
427: Changes to build procedure
428:
429: The command 'make tarballs' now also builds the tarball
430: tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz
431: except that it uses rearguard format intended for trailing-edge
432: data parsers.
433:
434: Changes to data format and to code
435:
436: The SAVE column of Rule and Zone lines can now have an 's' or 'd'
437: suffix, which specifies whether the adjusted time is standard time
438: or daylight saving time. If no suffix is given, daylight saving
439: time is used if and only if the SAVE column is nonzero; this is
440: the longstanding behavior. Although this new feature is not used
441: in tzdata, it could be used to specify the legal time in Namibia
442: 1994-2017, as opposed to the popular time (see below).
443:
1.25 christos 444: Changes to past timestamps
1.24 christos 445:
446: From 1994 through 2017 Namibia observed DST in winter, not summer.
447: That is, it used negative DST, as Ireland still does. This change
448: does not affect UTC offsets; it affects only the tm_isdst flag and
449: the abbreviation used during summer, which is now CAT, not WAST.
450: Although (as noted by Michael Deckers) summer and winter time were
451: both simply called "standard time" in Namibian law, in common
452: practice winter time was considered to be DST (as noted by Stephen
453: Colebourne). The full effect of this change is only in vanguard
1.25 christos 454: and main format; in rearguard format, the tm_isdst flag is still
1.24 christos 455: zero in winter and nonzero in summer.
456:
457: In 1946/7 Czechoslovakia also observed negative DST in winter.
1.25 christos 458: The full effect of this change is only in vanguard and main
459: formats; in rearguard format, it is modeled as plain GMT without
1.24 christos 460: daylight saving. Also, the dates of some 1944/5 DST transitions
461: in Czechoslovakia have been changed.
462:
463:
464: Release 2018d - 2018-03-22 07:05:46 -0700
465:
466: Briefly:
467:
468: Palestine starts DST a week earlier in 2018.
469: Add support for vanguard and rearguard data consumers.
470: Add subsecond precision to source data format, though not to data.
471:
1.25 christos 472: Changes to future timestamps
1.24 christos 473:
474: In 2018, Palestine starts DST on March 24, not March 31.
475: Adjust future predictions accordingly. (Thanks to Sharef Mustafa.)
476:
1.25 christos 477: Changes to past and future timestamps
1.24 christos 478:
479: Casey Station in Antarctica changed from +11 to +08 on 2018-03-11
480: at 04:00. (Thanks to Steffen Thorsen.)
481:
1.25 christos 482: Changes to past timestamps
1.24 christos 483:
484: Historical transitions for Uruguay, represented by
485: America/Montevideo, have been updated per official legal documents,
486: replacing previous data mainly originating from the inventions of
487: Shanks & Pottenger. This has resulted in adjustments ranging from
488: 30 to 90 minutes in either direction over at least two dozen
489: distinct periods ranging from one day to several years in length.
490: A mere handful of pre-1991 transitions are unaffected; data since
491: then has come from more reliable contemporaneous reporting. These
492: changes affect various timestamps in 1920-1923, 1936, 1939,
493: 1942-1943, 1959, 1966-1970, 1972, 1974-1980, and 1988-1990.
494: Additionally, Uruguay's pre-standard-time UT offset has been
495: adjusted westward by 7 seconds, from UT-03:44:44 to UT-03:44:51, to
496: match the location of the Observatory of the National Meteorological
497: Institute in Montevideo.
498: (Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.)
499:
500: Enderbury and Kiritimati skipped New Year's Eve 1994, not
501: New Year's Day 1995. (Thanks to Kerry Shetline.)
502:
503: Fix the 1912-01-01 transition for Portugal and its colonies.
504: This transition was at 00:00 according to the new UT offset, not
505: according to the old one. Also assume that Cape Verde switched on
506: the same date as the rest, not in 1907. This affects
507: Africa/Bissau, Africa/Sao_Tome, Asia/Macau, Atlantic/Azores,
508: Atlantic/Cape_Verde, Atlantic/Madeira, and Europe/Lisbon.
509: (Thanks to Michael Deckers.)
510:
511: Fix an off-by-1 error for pre-1913 timestamps in Jamaica and in
512: Turks & Caicos.
513:
514: Changes to past time zone abbreviations
515:
516: MMT took effect in Uruguay from 1908-06-10, not 1898-06-28. There
517: is no clock change associated with the transition.
518:
519: Changes to build procedure
520:
521: The new DATAFORM macro in the Makefile lets the installer choose
522: among three source data formats. The idea is to lessen downstream
523: disruption when data formats are improved.
524:
525: * DATAFORM=vanguard installs from the latest, bleeding-edge
526: format. DATAFORM=main (the default) installs from the format
527: used in the 'africa' etc. files. DATAFORM=rearguard installs
528: from a trailing-edge format. Eventually, elements of today's
529: vanguard format should move to the main format, and similarly
530: the main format's features should eventually move to the
531: rearguard format.
532:
533: * In the current version, the main and rearguard formats are
534: identical and match that of 2018c, so this change does not
535: affect default behavior. The vanguard format currently contains
536: one feature not in the main format: negative SAVE values. This
537: improves support for Ireland, which uses Irish Standard Time
538: (IST, UTC+01) in summer and GMT (UTC) in winter. tzcode has
539: supported negative SAVE values for decades, and this feature
540: should move to the main format soon. However, it will not move
541: to the rearguard format for quite some time because some
542: downstream parsers do not support it.
543:
544: * The build procedure constructs three files vanguard.zi, main.zi,
1.28 christos 545: and rearguard.zi, one for each format. Although the files
546: represent essentially the same data, they may have minor
547: discrepancies that users are not likely to notice. The files
1.24 christos 548: are intended for downstream data consumers and are not
549: installed. Zoneinfo parsers that do not support negative SAVE values
550: should start using rearguard.zi, so that they will be unaffected
551: when the negative-DST feature moves from vanguard to main.
552: Bleeding-edge Zoneinfo parsers that support the new features
553: already can use vanguard.zi; in this respect, current tzcode is
554: bleeding-edge.
555:
556: The Makefile should now be safe for parallelized builds, and 'make
557: -j to2050new.tzs' is now much faster on a multiprocessor host
558: with GNU Make.
559:
560: When built with -DSUPPRESS_TZDIR, the tzcode library no longer
561: prepends TZDIR/ to file names that do not begin with '/'. This is
562: not recommended for general use, due to its security implications.
563: (From a suggestion by Manuela Friedrich.)
564:
565: Changes to code
566:
567: zic now accepts subsecond precision in expressions like
568: 00:19:32.13, which is approximately the legal time of the
569: Netherlands from 1835 to 1937. However, because it is
570: questionable whether the few recorded uses of non-integer offsets
571: had subsecond precision in practice, there are no plans for tzdata
572: to use this feature. (Thanks to Steve Allen for pointing out
573: the limitations of historical data in this area.)
574:
575: The code is a bit more portable to MS-Windows. Installers can
576: compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that
577: reserve identifiers like 'localtime'. (Thanks to Manuela
1.29 ! christos 578: Friedrich.)
1.24 christos 579:
580: Changes to documentation and commentary
581:
582: theory.html now outlines tzdb's extensions to POSIX's model for
583: civil time, and has a section "POSIX features no longer needed"
584: that lists POSIX API components that are now vestigial.
585: (From suggestions by Steve Summit.) It also better distinguishes
586: time zones from tz regions. (From a suggestion by Guy Harris.)
587:
588: Commentary is now more consistent about using the phrase "daylight
589: saving time", to match the C name tm_isdst. Daylight saving time
590: need not occur in summer, and need not have a positive offset from
591: standard time.
592:
593: Commentary about historical transitions in Uruguay has been expanded
594: with links to many relevant legal documents.
595: (Thanks to Tim Parenti.)
596:
597: Commentary now uses some non-ASCII characters with Unicode value
598: less than U+0100, as they can be useful and should work even with
599: older editors such as XEmacs.
600:
601:
1.23 christos 602: Release 2018c - 2018-01-22 23:00:44 -0800
603:
604: Briefly:
1.24 christos 605: Revert Irish changes that relied on negative SAVE values.
1.23 christos 606:
607: Changes to tm_isdst
608:
609: Revert the 2018a change to Europe/Dublin. As before, this change
610: does not affect UT offsets or abbreviations; it affects only
611: whether timestamps are considered to be standard time or
612: daylight-saving time, as expressed in the tm_isdst flag of C's
613: struct tm type. This reversion is intended to be a temporary
614: workaround for problems discovered with downstream uses of
615: releases 2018a and 2018b, which implemented Irish time by using
1.24 christos 616: negative SAVE values in the Eire rules of the 'europe' file.
617: Although negative SAVE values have been part of tzcode for many
1.23 christos 618: years and are supported by many platforms, they were not
619: documented before 2018a and ICU and OpenJDK do not currently
620: support them. A mechanism to export data to platforms lacking
621: support for negative DST is planned to be developed before the
622: change is reapplied. (Problems reported by Deborah Goldsmith and
623: Stephen Colebourne.)
624:
1.25 christos 625: Changes to past timestamps
1.23 christos 626:
627: Japanese DST transitions (1948-1951) were Sundays at 00:00, not
628: Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.)
629:
630: Changes to build procedure
631:
632: The build procedure now works around mawk 1.3.3's lack of support
633: for character class expressions. (Problem reported by Ohyama.)
634:
635:
636: Release 2018b - 2018-01-17 23:24:48 -0800
637:
638: Briefly:
639: Fix a packaging problem in tz2018a, which was missing 'pacificnew'.
640:
641: Changes to build procedure
642:
643: The distribution now contains the file 'pacificnew' again.
644: This file was inadvertantly omitted in the 2018a distribution.
645: (Problem reported by Matias Fonzo.)
646:
647:
648: Release 2018a - 2018-01-12 22:29:21 -0800
649:
650: Briefly:
651: São Tomé and Príncipe switched from +00 to +01.
652: Brazil's DST will now start on November's first Sunday.
653: Ireland's standard time is now in the summer, not the winter.
654: Use Debian-style installation locations, instead of 4.3BSD-style.
655: New zic option -t.
656:
1.25 christos 657: Changes to past and future timestamps
1.23 christos 658:
659: São Tomé and Príncipe switched from +00 to +01 on 2018-01-01 at
660: 01:00. (Thanks to Steffen Thorsen and Michael Deckers.)
661:
1.25 christos 662: Changes to future timestamps
1.23 christos 663:
664: Starting in 2018 southern Brazil will begin DST on November's
665: first Sunday instead of October's third Sunday. (Thanks to
666: Steffen Thorsen.)
667:
1.25 christos 668: Changes to past timestamps
1.23 christos 669:
670: A discrepancy of 4 s in timestamps before 1931 in South Sudan has
671: been corrected. The 'backzone' and 'zone.tab' files did not agree
672: with the 'africa' and 'zone1970.tab' files. (Problem reported by
673: Michael Deckers.)
674:
675: The abbreviation invented for Bolivia Summer Time (1931-2) is now
676: BST instead of BOST, to be more consistent with the convention
677: used for Latvian Summer Time (1918-9) and for British Summer Time.
678:
679: Changes to tm_isdst
680:
681: Change Europe/Dublin so that it observes Irish Standard Time (UT
682: +01) in summer and GMT (as negative daylight-saving) in winter,
683: instead of observing standard time (GMT) in winter and Irish
684: Summer Time (UT +01) in summer. This change does not affect UT
685: offsets or abbreviations; it affects only whether timestamps are
686: considered to be standard time or daylight-saving time, as
687: expressed in the tm_isdst flag of C's struct tm type.
688: (Discrepancy noted by Derick Rethans.)
689:
690: Changes to build procedure
691:
692: The default installation locations have been changed to mostly
693: match Debian circa 2017, instead of being designed as an add-on to
694: 4.3BSD circa 1986. This affects the Makefile macros TOPDIR,
695: TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR,
696: USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor
697: locations more precisely. (This responds to suggestions from
698: Brian Inglis and from Steve Summit.)
699:
700: The default installation procedure no longer creates the
701: backward-compatibility link US/Pacific-New, which causes
702: confusion during user setup (e.g., see Debian bug 815200).
703: Use 'make BACKWARD="backward pacificnew"' to create the link
704: anyway, for now. Eventually we plan to remove the link entirely.
705:
706: tzdata.zi now contains a version-number comment.
707: (Suggested by Tom Lane.)
708:
709: The Makefile now quotes values like BACKWARD more carefully when
710: passing them to the shell. (Problem reported by Zefram.)
711:
712: Builders no longer need to specify -DHAVE_SNPRINTF on platforms
713: that have snprintf and use pre-C99 compilers. (Problem reported
714: by Jon Skeet.)
715:
716: Changes to code
717:
718: zic has a new option -t FILE that specifies the location of the
719: file that determines local time when TZ is unset. The default for
720: this location can be configured via the new TZDEFAULT makefile
721: macro, which defaults to /etc/localtime.
722:
723: Diagnostics and commentary now distinguish UT from UTC more
724: carefully; see theory.html for more information about UT vs UTC.
725:
726: zic has been ported to GCC 8's -Wstringop-truncation option.
727: (Problem reported by Martin Sebor.)
728:
729: Changes to documentation and commentary
730:
731: The zic man page now documents the longstanding behavior that
732: times and years can be out of the usual range, with negative times
733: counting backwards from midnight and with year 0 preceding year 1.
734: (Problem reported by Michael Deckers.)
735:
736: The theory.html file now mentions the POSIX limit of six chars
737: per abbreviation, and lists alphabetic abbreviations used.
738:
739: The files tz-art.htm and tz-link.htm have been renamed to
740: tz-art.html and tz-link.html, respectively, for consistency with
741: other file names and to simplify web server configuration.
742:
743:
1.22 christos 744: Release 2017c - 2017-10-20 14:49:34 -0700
745:
746: Briefly:
747: Northern Cyprus switches from +03 to +02/+03 on 2017-10-29.
748: Fiji ends DST 2018-01-14, not 2018-01-21.
749: Namibia switches from +01/+02 to +02 on 2018-04-01.
750: Sudan switches from +03 to +02 on 2017-11-01.
751: Tonga likely switches from +13/+14 to +13 on 2017-11-05.
752: Turks & Caicos switches from -04 to -05/-04 on 2018-11-04.
753: A new file tzdata.zi now holds a small text copy of all data.
754: The zic input format has been regularized slightly.
755:
1.25 christos 756: Changes to future timestamps
1.22 christos 757:
758: Northern Cyprus has decided to resume EU rules starting
759: 2017-10-29, thus reinstituting winter time.
760:
761: Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously
762: predicted. (Thanks to Dominic Fok.) Adjust future predictions
763: accordingly.
764:
765: Namibia will switch from +01 with DST to +02 all year on
766: 2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01
767: at 02:00. (Thanks to Steffen Thorsen.)
768:
769: Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed
770: Atyya and Yahia Abdalla.) South Sudan is not switching, so
771: Africa/Juba is no longer a link to Africa/Khartoum.
772:
773: Tonga has likely ended its experiment with DST, and will not
774: adjust its clocks on 2017-11-05. Although Tonga has not announced
775: whether it will continue to observe DST, the IATA is assuming that
776: it will not. (Thanks to David Wade.)
777:
778: Turks & Caicos will switch from -04 all year to -05 with US DST on
779: 2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04
780: at 02:00. (Thanks to Steffen Thorsen.)
781:
1.25 christos 782: Changes to past timestamps
1.22 christos 783:
784: Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03.
785: (Thanks to Arthur David Olson.)
786:
787: Detroit did not observe DST in 1967.
788:
789: Use railway time for Asia/Kolkata before 1941, by switching to
790: Madras local time (UT +052110) in 1870, then to IST (UT +0530) in
791: 1906. Also, treat 1941-2's +0630 as DST, like 1942-5.
792:
793: Europe/Dublin's 1946 and 1947 fallback transitions occurred at
794: 02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.)
795:
796: Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to
797: American time in 1892, not 1879. (Thanks to Michael Deckers.)
798:
799: Adjust the 1867 transition in Alaska to better reflect the
800: historical record, by changing it to occur on 1867-10-18 at 15:30
801: Sitka time rather than at the start of 1867-10-17 local time.
802: Although strictly speaking this is accurate only for Sitka,
803: the rest of Alaska's blanks need to be filled in somehow.
804:
805: Fix off-by-one errors in UT offsets for Adak and Nome before 1867.
806: (Thanks to Michael Deckers.)
807:
808: Add 7 s to the UT offset in Asia/Yangon before 1920.
809:
810: Changes to zone names
811:
812: Remove Canada/East-Saskatchewan from the 'backward' file, as it
813: exceeded the 14-character limit and was an unused misnomer anyway.
814:
815: Changes to build procedure
816:
817: To support applications that prefer to read time zone data in text
818: form, two zic input files tzdata.zi and leapseconds are now
819: installed by default. The commands 'zic tzdata.zi' and 'zic -L
820: leapseconds tzdata.zi' can reproduce the tzdata binary files
821: without and with leap seconds, respectively. To prevent these two
822: new files from being installed, use 'make TZDATA_TEXT=', and to
823: suppress leap seconds from the tzdata text installation, use 'make
824: TZDATA_TEXT=tzdata.zi'.
825:
826: 'make BACKWARD=' now suppresses backward-compatibility names
827: like 'US/Pacific' that are defined in the 'backward' and
828: 'pacificnew' files.
829:
830: 'make check' now works on systems that lack a UTF-8 locale,
831: or that lack the nsgmls program. Set UTF8_LOCALE to configure
832: the name of a UTF-8 locale, if you have one.
833:
834: Y2K runtime checks are no longer enabled by default. Add
835: -DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of
836: adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU
837: to disable them. (New name suggested by Brian Inglis.)
838:
839: The build procedure for zdump now works on AIX 7.1.
840: (Problem reported by Kees Dekker.)
841:
842: Changes to code
843:
844: zic and the reference runtime now reject multiple leap seconds
845: within 28 days of each other, or leap seconds before the Epoch.
846: As a result, support for double leap seconds, which was
847: obsolescent and undocumented, has been removed. Double leap
848: seconds were an error in the C89 standard; they have never existed
849: in civil timekeeping. (Thanks to Robert Elz and Bradley White for
850: noticing glitches in the code that uncovered this problem.)
851:
852: zic now warns about use of the obsolescent and undocumented -y
853: option, and about use of the obsolescent TYPE field of Rule lines.
854:
855: zic now allows unambiguous abbreviations like "Sa" and "Su" for
856: weekdays; formerly it rejected them due to a bug. Conversely, zic
857: no longer considers non-prefixes to be abbreviations; for example,
858: it no longer accepts "lF" as an abbreviation for "lastFriday".
859: Also, zic warns about the undocumented usage with a "last-"
860: prefix, e.g., "last-Fri".
861:
862: Similarly, zic now accepts the unambiguous abbreviation "L" for
863: "Link" in ordinary context and for "Leap" in leap-second context.
864: Conversely, zic no longer accepts non-prefixes such as "La" as
865: abbreviations for words like "Leap".
866:
867: zic no longer accepts leap second lines in ordinary input, or
868: ordinary lines in leap second input. Formerly, zic sometimes
869: warned about this undocumented usage and handled it incorrectly.
870:
871: The new macro HAVE_TZNAME governs whether the tzname external
872: variable is exported, instead of USG_COMPAT. USG_COMPAT now
873: governs only the external variables "timezone" and "daylight".
874: This change is needed because the three variables are not in the
875: same category: although POSIX requires tzname, it specifies the
876: other two variables as optional. Also, USG_COMPAT is now 1 or 0:
877: if not defined, the code attempts to guess it from other macros.
878:
879: localtime.c and difftime.c no longer require stdio.h, and .c files
880: other than zic.c no longer require sys/wait.h.
881:
882: zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.)
883:
884: Calculation of time_t extrema works around a bug in GCC 4.8.4
885: (Reported by Stan Shebs and Joseph Myers.)
886:
887: zic.c no longer mistranslates formats of line numbers in non-English
888: locales. (Problem reported by Benno Schulenberg.)
889:
890: Several minor changes have been made to the code to make it a
891: bit easier to port to MS-Windows and Solaris. (Thanks to Kees
892: Dekker for reporting the problems.)
893:
894: Changes to documentation and commentary
895:
896: The two new files 'theory.html' and 'calendars' contain the
897: contents of the removed file 'Theory'. The goal is to document
898: tzdb theory more accessibly.
899:
900: The zic man page now documents abbreviation rules.
901:
902: tz-link.htm now covers how to apply tzdata changes to clients.
903: (Thanks to Jorge Fábregas for the AIX link.) It also mentions MySQL.
904:
905: The leap-seconds.list URL has been updated to something that is
906: more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.)
907:
1.21 christos 908: Release 2017b - 2017-03-17 07:30:38 -0700
909:
910: Briefly: Haiti has resumed DST.
911:
1.25 christos 912: Changes to past and future timestamps
1.21 christos 913:
914: Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.)
915:
1.25 christos 916: Changes to past timestamps
1.21 christos 917:
918: Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01.
919:
920: Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430"
921: is one byte over the POSIX limit. (Problem reported by Derick Rethans.)
922:
1.22 christos 923: Changes to code
924:
925: The reference localtime implementation now falls back on the
926: current US daylight-saving transition rules rather than the
927: 1987-2006 rules. This fallback occurs only when (1) the TZ
1.25 christos 928: environment variable has a value like "AST4ADT" that asks
1.22 christos 929: for daylight saving time but does not specify the rules, (2) there
930: is no file by that name, and (3) the TZDEFRULES file cannot be
931: loaded. (Thanks to Tom Lane.)
932:
1.21 christos 933:
1.20 christos 934: Release 2017a - 2017-02-28 00:05:36 -0800
935:
936: Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia
937: discontinues DST.
938:
1.25 christos 939: Changes to future timestamps
1.20 christos 940:
941: Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.)
942:
943: Chile's Region of Magallanes moves from -04/-03 to -03 year-round.
944: Its clocks diverge from America/Santiago starting 2017-05-13 at
945: 23:00, hiving off a new zone America/Punta_Arenas. Although the
946: Chilean government says this change expires in May 2019, for now
947: assume it's permanent. (Thanks to Juan Correa and Deborah
948: Goldsmith.) This also affects Antarctica/Palmer.
949:
1.25 christos 950: Changes to past timestamps
1.20 christos 951:
1.25 christos 952: Fix many entries for historical timestamps for Europe/Madrid
1.20 christos 953: before 1979, to agree with tables compiled by Pere Planesas of the
954: National Astronomical Observatory of Spain. As a side effect,
1.25 christos 955: this changes some timestamps for Africa/Ceuta before 1929, which
1.20 christos 956: are probably guesswork anyway. (Thanks to Steve Allen and
957: Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for
958: correcting the 1901 transition.)
959:
960: Ecuador observed DST from 1992-11-28 to 1993-02-05.
961: (Thanks to Alois Treindl.)
962:
963: Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21.
964: (Thanks to Stepan Golosunov.)
965:
966: Changes to past and future time zone abbreviations
967:
968: Switch to numeric time zone abbreviations for South America, as
969: part of the ongoing project of removing invented abbreviations.
970: This avoids the need to invent an abbreviation for the new Chilean
971: new zone. Similarly, switch from invented to numeric time zone
972: abbreviations for Afghanistan, American Samoa, the Azores,
973: Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei,
974: Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is,
975: Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland,
976: Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia,
977: the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia,
978: Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau,
979: Papua New Guinea, the Philippines, Pitcairn, Qatar, Réunion, St
980: Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore,
981: Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and
982: Xinjiang; for 20-minute daylight saving time in Ghana before 1943;
983: for half-hour daylight saving time in Belize before 1944 and in
984: the Dominican Republic before 1975; and for Canary Islands before
985: 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for
986: Indian Summer Time before 1942, for Indonesia before around 1964,
987: for Kenya before 1960, for Liberia before 1973, for Madeira before
988: 1967, for Namibia before 1943, for the Netherlands in 1937-9, for
989: Pakistan before 1971, for Western Sahara before 1977, and for
990: Zaporozhye in 1880-1924.
991:
992: For Alaska time from 1900 through 1967, instead of "CAT" use the
993: abbreviation "AST", the abbreviation commonly used at the time
994: (Atlantic Standard Time had not been standardized yet). Use "AWT"
995: and "APT" instead of the invented abbreviations "CAWT" and "CAPT".
996:
997: Use "CST" and "CDT" instead of invented abbreviations for Macau
998: before 1999 and Taiwan before 1938, and use "JST" instead of the
999: invented abbreviation "JCST" for Japan and Korea before 1938.
1000:
1001: Change to database entry category
1002:
1003: Move the Pacific/Johnston link from 'australasia' to 'backward',
1004: since Johnston is now uninhabited.
1005:
1006: Changes to code
1007:
1008: zic no longer mishandles some transitions in January 2038 when it
1009: attempts to work around Qt bug 53071. This fixes a bug affecting
1010: Pacific/Tongatapu that was introduced in zic 2016e. localtime.c
1011: now contains a workaround, useful when loading a file generated by
1012: a buggy zic. (Problem and localtime.c fix reported by Bradley
1013: White.)
1014:
1015: zdump -i now outputs non-hour numeric time zone abbreviations
1016: without a colon, e.g., "+0530" rather than "+05:30". This agrees
1017: with zic %z and with common practice, and simplifies auditing of
1018: zdump output.
1019:
1020: zdump is now buildable again with -DUSE_LTZ=0.
1021: (Problem reported by Joseph Myers.)
1022:
1023: zdump.c now always includes private.h, to avoid code duplication
1024: with private.h. (Problem reported by Kees Dekker.)
1025:
1026: localtime.c no longer mishandles early or late timestamps
1027: when TZ is set to a POSIX-style string that specifies DST.
1028: (Problem reported by Kees Dekker.)
1029:
1030: date and strftime now cause %z to generate "-0000" instead of
1031: "+0000" when the UT offset is zero and the time zone abbreviation
1032: begins with "-".
1033:
1034: Changes to documentation and commentary
1035:
1036: The 'Theory' file now better documents choice of historical time
1037: zone abbreviations. (Problems reported by Michael Deckers.)
1038:
1039: tz-link.htm now covers leap smearing, which is popular in clouds.
1040:
1041:
1042: Release 2016j - 2016-11-22 23:17:13 -0800
1043:
1044: Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04.
1045:
1.25 christos 1046: Changes to future timestamps
1.20 christos 1047:
1048: Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00.
1049: This hives off a new zone Europe/Saratov from Europe/Volgograd.
1050: (Thanks to Yuri Konotopov and Stepan Golosunov.)
1051:
1.25 christos 1052: Changes to past timestamps
1.20 christos 1053:
1054: The new zone Asia/Atyrau for Atyraū Region, Kazakhstan, is like
1055: Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring
1056: 1999, not fall 1994. (Thanks to Stepan Golosunov.)
1057:
1058: Changes to past time zone abbreviations
1059:
1060: Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote
1061: summer time before 1948. The old use of "EET" was a typo.
1062:
1063: Changes to code
1064:
1065: zic no longer mishandles file systems that lack hard links, fixing
1066: bugs introduced in 2016g. (Problems reported by Tom Lane.)
1067: Also, when the destination already contains symbolic links, zic
1068: should now work better on systems where the 'link' system call
1069: does not follow symbolic links.
1070:
1071: Changes to documentation and commentary
1072:
1073: tz-link.htm now documents the relationship between release version
1074: numbers and development-repository commit tags. (Suggested by
1075: Paul Koning.)
1076:
1077: The 'Theory' file now documents UT.
1078:
1079: iso3166.tab now accents "Curaçao", and commentary now mentions
1080: the names "Cabo Verde" and "Czechia". (Thanks to Jiří Boháč.)
1081:
1082:
1.19 christos 1083: Release 2016i - 2016-11-01 23:19:52 -0700
1084:
1085: Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga
1086: reintroduces DST on 2016-11-06.
1087:
1.25 christos 1088: Changes to future timestamps
1.19 christos 1089:
1090: Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on
1091: 2017-01-15 at 03:00. Assume future observances in Tonga will be
1092: from the first Sunday in November through the third Sunday in
1093: January, like Fiji. (Thanks to Pulu ʻAnau.) Switch to numeric
1094: time zone abbreviations for this zone.
1095:
1.25 christos 1096: Changes to past and future timestamps
1.19 christos 1097:
1098: Northern Cyprus is now +03 year round, causing a split in Cyprus
1099: time zones starting 2016-10-30 at 04:00. This creates a zone
1100: Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.)
1101:
1102: Antarctica/Casey switched from +08 to +11 on 2016-10-22.
1103: (Thanks to Steffen Thorsen.)
1104:
1.25 christos 1105: Changes to past timestamps
1.19 christos 1106:
1.25 christos 1107: Several corrections were made for pre-1975 timestamps in Italy.
1.19 christos 1108: These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and
1109: Europe/Vatican.
1110:
1111: First, the 1893-11-01 00:00 transition in Italy used the new UT
1112: offset (+01), not the old (+00:49:56). (Thanks to Michael
1113: Deckers.)
1114:
1115: Second, rules for daylight saving in Italy were changed to agree
1116: with Italy's National Institute of Metrological Research (INRiM)
1117: except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian
1118: Inglis, and Michael Deckers):
1119:
1120: The 1916-06-03 transition was at 24:00, not 00:00.
1121:
1122: The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at
1123: 00:00, not 01:00.
1124:
1125: The 1917-09-30 and 1918-10-06 transitions were at 24:00, not
1126: 01:00.
1127:
1128: The 1944-09-17 transition was at 03:00, not 01:00. This
1129: particular change is taken from Italian law as INRiM's table,
1130: (which says 02:00) appears to have a typo here. Also, keep the
1131: 1944-04-03 transition for Europe/Rome, as Rome was controlled by
1132: Germany then.
1133:
1134: The 1967-1970 and 1972-1974 fallback transitions were at 01:00,
1135: not 00:00.
1136:
1137: Changes to code
1138:
1139: The code should now be buildable on AmigaOS merely by setting the
1140: appropriate Makefile variables. (From a patch by Carsten Larsen.)
1141:
1142:
1.18 christos 1143: Release 2016h - 2016-10-19 23:17:57 -0700
1144:
1.25 christos 1145: Changes to future timestamps
1.18 christos 1146:
1147: Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not
1148: 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that
1149: future fall transitions will be on the last Saturday of October
1150: at 01:00, which is consistent with predicted spring transitions
1151: on the last Saturday of March. (Thanks to Tim Parenti.)
1152:
1.25 christos 1153: Changes to past timestamps
1.18 christos 1154:
1155: In Turkey, transitions in 1986-1990 were at 01:00 standard time
1156: not at 02:00, and the spring 1994 transition was on March 20, not
1157: March 27. (Thanks to Kıvanç Yazan.)
1158:
1159: Changes to past and future time zone abbreviations
1160:
1161: Asia/Colombo now uses numeric time zone abbreviations like "+0530"
1162: instead of alphabetic ones like "IST" and "LKT". Various
1163: English-language sources use "IST", "LKT" and "SLST", with no
1164: working consensus. (Usage of "SLST" mentioned by Sadika
1165: Sumanapala.)
1166:
1167: Changes to code
1168:
1169: zic no longer mishandles relativizing file names when creating
1170: symbolic links like /etc/localtime, when these symbolic links
1171: are outside the usual directory hierarchy. This fixes a bug
1172: introduced in 2016g. (Problem reported by Andreas Stieger.)
1173:
1174: Changes to build procedure
1175:
1176: New rules 'traditional_tarballs' and 'traditional_signatures' for
1177: building just the traditional-format distribution. (Requested by
1178: Deborah Goldsmith.)
1179:
1180: The file 'version' is now put into the tzdata tarball too.
1181: (Requested by Howard Hinnant.)
1182:
1183: Changes to documentation and commentary
1184:
1185: The 'Theory' file now has a section on interface stability.
1186: (Requested by Paul Koning.) It also mentions features like
1187: tm_zone and localtime_rz that have long been supported by the
1188: reference code.
1189:
1190: tz-link.htm has improved coverage of time zone boundaries suitable
1191: for geolocation. (Thanks to heads-ups from Evan Siroky and Matt
1192: Johnson.)
1193:
1194: The US commentary now mentions Allen and the "day of two noons".
1195:
1196: The Fiji commentary mentions the government's 2016-10-03 press
1197: release. (Thanks to Raymond Kumar.)
1198:
1199:
1.17 christos 1200: Release 2016g - 2016-09-13 08:56:38 -0700
1201:
1.25 christos 1202: Changes to future timestamps
1.17 christos 1203:
1204: Turkey switched from EET/EEST (+02/+03) to permanent +03,
1205: effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather
1206: than an invented abbreviation for the new time.
1207:
1208: New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52.
1209: (Thanks to Tim Parenti.)
1210:
1.25 christos 1211: Changes to past timestamps
1.17 christos 1212:
1213: For America/Los_Angeles, spring-forward transition times have been
1214: corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in
1215: 1950-1966.
1216:
1217: For zones using Soviet time on 1919-07-01, transitions to UT-based
1218: time were at 00:00 UT, not at 02:00 local time. The affected
1219: zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and
1220: Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.)
1221:
1222: Changes to past and future time zone abbreviations
1223:
1224: The Factory zone now uses the time zone abbreviation -00 instead
1225: of a long English-language string, as -00 is now the normal way to
1226: represent an undefined time zone.
1227:
1228: Several zones in Antarctica and the former Soviet Union, along
1229: with zones intended for ships at sea that cannot use POSIX TZ
1230: strings, now use numeric time zone abbreviations instead of
1231: invented or obsolete alphanumeric abbreviations. The affected
1232: zones are Antarctica/Casey, Antarctica/Davis,
1233: Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera,
1234: Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok,
1235: Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita,
1236: Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga,
1237: Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin,
1238: Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi,
1239: Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg,
1240: Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11,
1241: Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5,
1242: Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2,
1243: Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8,
1244: Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad,
1245: Europe/Minsk, Europe/Samara, Europe/Volgograd, and
1246: Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM
1247: was replaced by +05, whereas MSK and MSD were kept as they are not
1248: our invention and are widely used.
1249:
1250: Changes to zone names
1251:
1252: Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link.
1253: (Thanks to David Massoud.)
1254:
1255: Changes to code
1256:
1257: zic no longer generates binary files containing POSIX TZ-like
1258: strings that disagree with the local time type after the last
1259: explicit transition in the data. This fixes a bug with
1.25 christos 1260: Africa/Casablanca and Africa/El_Aaiun in some year-2037 timestamps
1261: on the reference platform. (Thanks to Alexander Belopolsky for
1262: reporting the bug and suggesting a way forward.)
1.17 christos 1263:
1264: If the installed localtime and/or posixrules files are symbolic
1265: links, zic now keeps them symbolic links when updating them, for
1266: compatibility with platforms like OpenSUSE where other programs
1267: configure these files as symlinks.
1268:
1269: zic now avoids hard linking to symbolic links, avoids some
1270: unnecessary mkdir and stat system calls, and uses shorter file
1271: names internally.
1272:
1273: zdump has a new -i option to generate transitions in a
1274: more-compact but still human-readable format. This option is
1275: experimental, and the output format may change in future versions.
1276: (Thanks to Jon Skeet for suggesting that an option was needed,
1277: and thanks to Tim Parenti and Chris Rovick for further comments.)
1278:
1279: Changes to build procedure
1280:
1281: An experimental distribution format is available, in addition
1282: to the traditional format which will continue to be distributed.
1283: The new format is a tarball tzdb-VERSION.tar.lz with signature
1284: file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory
1285: tzdb-VERSION containing the code and data of the traditional
1286: two-tarball format, along with extra data that may be useful.
1287: (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others
1288: for comments about the experimental format.)
1289:
1290: The release version number is now more accurate in the usual case
1291: where releases are built from a Git repository. For example, if
1292: 23 commits and some working-file changes have been made since
1293: release 2016g, the version number is now something like
1294: '2016g-23-g50556e3-dirty' instead of the misleading '2016g'.
1.20 christos 1295: Tagged releases use the same version number format as before,
1.17 christos 1296: e.g., '2016g'. To support the more-accurate version number, its
1297: specification has moved from a line in the Makefile to a new
1298: source file 'version'.
1299:
1300: The experimental distribution contains a file to2050.tzs that
1301: contains what should be the output of 'zdump -i -c 2050' on
1302: primary zones. If this file is available, 'make check' now checks
1303: that zdump generates this output.
1304:
1305: 'make check_web' now works on Fedora-like distributions.
1306:
1307: Changes to documentation and commentary
1308:
1309: tzfile.5 now documents the new restriction on POSIX TZ-like
1310: strings that is now implemented by zic.
1311:
1312: Comments now cite URLs for some 1917-1921 Russian DST decrees.
1313: (Thanks to Alexander Belopolsky.)
1314:
1315: tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J
1316: (thanks to Meno Hochschild) and ThreeTen-Extra, and its
1317: description of Java 8 has been brought up to date (thanks to
1318: Stephen Colebourne). Its description of local time on Mars has
1319: been updated to match current practice, and URLs have been updated
1320: and some obsolete ones removed.
1321:
1322:
1.16 christos 1323: Release 2016f - 2016-07-05 16:26:51 +0200
1324:
1.25 christos 1325: Changes affecting future timestamps
1.16 christos 1326:
1327: The Egyptian government changed its mind on short notice, and
1328: Africa/Cairo will not introduce DST starting 2016-07-07 after all.
1329: (Thanks to Mina Samuel.)
1330:
1331: Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00.
1332: (Thanks to Stepan Golosunov.)
1333:
1.25 christos 1334: Changes to past and future timestamps
1.16 christos 1335:
1336: Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone
1337: abbreviations instead of invented ones.
1338:
1.25 christos 1339: Changes affecting past timestamps
1.16 christos 1340:
1341: Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00.
1342: (Thanks to Stepan Golosunov.)
1343:
1344:
1345: Release 2016e - 2016-06-14 08:46:16 -0700
1346:
1.25 christos 1347: Changes affecting future timestamps
1.16 christos 1348:
1349: Africa/Cairo observes DST in 2016 from July 7 to the end of October.
1350: Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.)
1351: For future years, guess April's last Thursday to October's last
1352: Thursday except for Ramadan.
1353:
1.25 christos 1354: Changes affecting past timestamps
1.16 christos 1355:
1356: Locations while uninhabited now use '-00', not 'zzz', as a
1357: placeholder time zone abbreviation. This is inspired by Internet
1358: RFC 3339 and is more consistent with numeric time zone
1359: abbreviations already used elsewhere. The change affects several
1360: arctic and antarctic locations, e.g., America/Cambridge_Bay before
1361: 1920 and Antarctica/Troll before 2005.
1362:
1363: Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was
1364: at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.)
1365:
1366: Changes to code
1367:
1368: zic now outputs a dummy transition at time 2**31 - 1 in zones
1369: whose POSIX-style TZ strings contain a '<'. This mostly works
1370: around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>.
1371: (Thanks to Zhanibek Adilbekov for reporting the Qt bug.)
1372:
1373: Changes affecting documentation and commentary
1374:
1375: tz-link.htm says why governments should give plenty of notice for
1376: time zone or DST changes, and refers to Matt Johnson's blog post.
1377:
1378: tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.)
1379:
1380:
1381: Release 2016d - 2016-04-17 22:50:29 -0700
1382:
1.25 christos 1383: Changes affecting future timestamps
1.16 christos 1384:
1385: America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30.
1386: (Thanks to Alexander Krivenyshev for the heads-up.)
1387:
1388: Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00.
1389: (Thanks to Alexander Krivenyshev and Matt Johnson.)
1390:
1391: New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers
1392: Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29
1393: at 02:00. (Thanks to Stepan Golosunov.)
1394:
1.25 christos 1395: Changes affecting past timestamps
1.16 christos 1396:
1397: New zone Europe/Kirov, split off from Europe/Volgograd. It covers
1398: Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on
1399: 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made
1400: the same change. (Thanks to Stepan Golosunov.)
1401:
1402: Russia and nearby locations had daylight-saving transitions on
1403: 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on
1404: 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan
1405: Golosunov.)
1406:
1407: Many corrections to historical time in Kazakhstan from 1991
1408: through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's
1409: invented time zone abbreviations with numeric abbreviations.
1410:
1411: Changes to commentary
1412:
1413: Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references).
1414:
1415:
1416: Release 2016c - 2016-03-23 00:51:27 -0700
1417:
1.25 christos 1418: Changes affecting future timestamps
1.16 christos 1419:
1420: Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.)
1421:
1422: Chile reverts from permanent to seasonal DST. (Thanks to Juan
1423: Correa for the heads-up, and to Tim Parenti for corrections.)
1424: Guess that future transitions are August's and May's second
1425: Saturdays at 24:00 mainland time. Also, call the period from
1426: 2014-09-07 through 2016-05-14 daylight saving time instead of
1427: standard time, as that seems more appropriate now.
1428:
1.25 christos 1429: Changes affecting past timestamps
1.16 christos 1430:
1431: Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to
1432: +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed
1433: from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26.
1434: (Thanks to Stepan Golosunov.)
1435:
1436: Changes to commentary
1437:
1438: Several updates and URLs for historical and proposed Russian changes.
1439: (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.)
1440:
1441:
1.15 christos 1442: Release 2016b - 2016-03-12 17:30:14 -0800
1443:
1.16 christos 1444: Compatibility note
1445:
1446: Starting with release 2016b, some data entries cause zic implementations
1447: derived from tz releases 2005j through 2015e to issue warnings like
1448: "time zone abbreviation differs from POSIX standard (+03)".
1449: These warnings should not otherwise affect zic's output and can safely be
1450: ignored on today's platforms, as the warnings refer to a restriction in
1451: POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the
1452: warnings is to upgrade to zic derived from tz releases 2015f and later.
1453:
1.25 christos 1454: Changes affecting future timestamps
1.15 christos 1455:
1456: New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and
1457: Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on
1458: 2016-03-27 at 02:00 local time. They need distinct zones since their
1459: post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and
1460: Altai Republic, Russia, which will switch from +06 to +07 on the same date
1461: and local time. The Astrakhan change is already official; the others have
1462: passed the first reading in the State Duma and are extremely likely.
1463: Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00.
1464: (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson
1465: and Stepan Golosunov for followup.)
1466:
1467: As a trial of a new system that needs less information to be made up,
1468: the new zones use numeric time zone abbreviations like "+04"
1469: instead of invented abbreviations like "ASTT".
1470:
1471: Haiti will not observe DST in 2016. (Thanks to Jean Antoine via
1472: Steffen Thorsen.)
1473:
1474: Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00.
1475: (Thanks to Hannah Kreitem.) Guess future transitions will be March's last
1476: Saturday at 01:00, not March's last Friday at 24:00.
1477:
1.25 christos 1478: Changes affecting past timestamps
1.15 christos 1479:
1480: Europe/Chisinau observed DST during 1990, and switched from +04 to
1481: +03 at 1990-05-06 02:00, instead of switching from +03 to +02.
1482: (Thanks to Stepan Golosunov.)
1483:
1484: 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not
1485: KUYT/KUYST. (Thanks to Stepan Golosunov.)
1486:
1487: Changes to code
1488:
1489: tzselect's diagnostics and checking, and checktab.awk's checking,
1490: have been improved. (Thanks to J William Piggott.)
1491:
1492: tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.)
1493:
1494: tzselect now tests Julian-date TZ settings more accurately.
1495: (Thanks to J William Piggott.)
1496:
1497: Changes to commentary
1498:
1499: Comments in zone tables have been improved. (Thanks to J William Piggott.)
1500:
1501: tzselect again limits its menu comments so that menus fit on a
1.24 christos 1502: 24×80 alphanumeric display.
1.15 christos 1503:
1504: A new web page tz-how-to.html. (Thanks to Bill Seymour.)
1505:
1506: In the Theory file, the description of possible time zone abbreviations in
1507: tzdata has been cleaned up, as the old description was unclear and
1508: inconsistent. (Thanks to Alain Mouette for reporting the problem.)
1509:
1510:
1511: Release 2016a - 2016-01-26 23:28:02 -0800
1512:
1.25 christos 1513: Changes affecting future timestamps
1.15 christos 1514:
1515: America/Cayman will not observe daylight saving this year after all.
1516: Revert our guess that it would. (Thanks to Matt Johnson.)
1517:
1518: Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00.
1519: (Thanks to Alexander Krivenyshev.)
1520:
1521: Asia/Tehran now has DST predictions for the year 2038 and later,
1522: to be March 21 00:00 to September 21 00:00. This is likely better
1523: than predicting no DST, albeit off by a day every now and then.
1524:
1.25 christos 1525: Changes affecting past and future timestamps
1.15 christos 1526:
1527: America/Metlakatla switched from PST all year to AKST/AKDT on
1528: 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.)
1529:
1530: America/Santa_Isabel has been removed, and replaced with a
1531: backward compatibility link to America/Tijuana. Its contents were
1532: apparently based on a misreading of Mexican legislation.
1533:
1.25 christos 1534: Changes affecting past timestamps
1.15 christos 1535:
1536: Asia/Karachi's two transition times in 2002 were off by a minute.
1537: (Thanks to Matt Johnson.)
1538:
1539: Changes affecting build procedure
1540:
1541: An installer can now combine leap seconds with use of the backzone file,
1542: e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'.
1543: The old 'make posix_packrat' rule is now marked as obsolescent.
1544: (Thanks to Ian Abbott for an initial implementation.)
1545:
1546: Changes affecting documentation and commentary
1547:
1548: A new file LICENSE makes it easier to see that the code and data
1549: are mostly public-domain. (Thanks to James Knight.) The three
1550: non-public-domain files now use the current (3-clause) BSD license
1551: instead of older versions of that license.
1552:
1553: tz-link.htm mentions the BDE library (thanks to Andrew Paprocki),
1554: CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section
1555: on editing tz source files (with a mention of Sublime zoneinfo,
1556: thanks to Gilmore Davidson).
1557:
1558: The Theory and asia files now mention the 2015 book "The Global
1559: Transformation of Time, 1870-1950", and cite a couple of reviews.
1560:
1561: The America/Chicago entry now documents the informal use of US
1562: central time in Fort Pierre, South Dakota. (Thanks to Rick
1563: McDermid, Matt Johnson, and Steve Jones.)
1564:
1565:
1.14 christos 1566: Release 2015g - 2015-10-01 00:39:51 -0700
1567:
1.25 christos 1568: Changes affecting future timestamps
1.14 christos 1569:
1570: Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25.
1571: (Thanks to Fatih.)
1572:
1573: Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time.
1574: (Thanks to Alexander Krivenyshev.)
1575:
1576: Fiji's 2016 fall-back transition is scheduled for January 17, not 24.
1577: (Thanks to Ken Rylander.)
1578:
1579: Fort Nelson, British Columbia will not fall back on 2015-11-01. It has
1580: effectively been on MST (-0700) since it advanced its clocks on 2015-03-08.
1581: New zone America/Fort_Nelson. (Thanks to Matt Johnson.)
1582:
1.25 christos 1583: Changes affecting past timestamps
1.14 christos 1584:
1585: Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00.
1586:
1587: Changes affecting code
1588:
1589: localtime no longer mishandles America/Anchorage after 2037.
1590: (Thanks to Bradley White for reporting the bug.)
1591:
1.15 christos 1592: On hosts with signed 32-bit time_t, localtime no longer mishandles
1593: Pacific/Fiji after 2038-01-16 14:00 UTC.
1594:
1.14 christos 1595: The localtime module allows the variables 'timezone', 'daylight',
1596: and 'altzone' to be in common storage shared with other modules,
1597: and declares them in case the system <time.h> does not.
1598: (Problems reported by Kees Dekker.)
1599:
1600: On platforms with tm_zone, strftime.c now assumes it is not NULL.
1601: This simplifies the code and is consistent with zdump.c.
1602: (Problem reported by Christos Zoulas.)
1603:
1604: Changes affecting documentation
1605:
1606: The tzfile man page now documents that transition times denote the
1607: starts (not the ends) of the corresponding time periods.
1608: (Ambiguity reported by Bill Seymour.)
1609:
1610:
1.13 christos 1611: Release 2015f - 2015-08-10 18:06:56 -0700
1612:
1.25 christos 1613: Changes affecting future timestamps
1.13 christos 1614:
1615: North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.)
1616: The abbreviation remains "KST". (Thanks to Robert Elz.)
1617:
1618: Uruguay no longer observes DST. (Thanks to Steffen Thorsen
1619: and Pablo Camargo.)
1620:
1.25 christos 1621: Changes affecting past and future timestamps
1.13 christos 1622:
1623: Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC.
1624: (Thanks to Roman Tudos.)
1625:
1626: Changes affecting data format and code
1627:
1628: zic's '-y YEARISTYPE' option is no longer documented. The TYPE
1629: field of a Rule line should now be '-'; the old values 'even',
1630: 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented.
1631: Although the implementation has not changed, these features do not
1632: work in the default installation, they are not used in the data,
1633: and they are now considered obsolescent.
1634:
1635: zic now checks that two rules don't take effect at the same time.
1636: (Thanks to Jon Skeet and Arthur David Olson.) Constraints on
1637: simultaneity are now documented.
1638:
1.23 christos 1639: The two characters '%z' in a zone format now stand for the UT
1640: offset, e.g., '-07' for seven hours behind UT and '+0530' for
1.13 christos 1641: five hours and thirty minutes ahead. This better supports time
1642: zone abbreviations conforming to POSIX.1-2001 and later.
1643:
1644: Changes affecting installed data files
1645:
1646: Comments for America/Halifax and America/Glace_Bay have been improved.
1647: (Thanks to Brian Inglis.)
1648:
1649: Data entries have been simplified for Atlantic/Canary, Europe/Simferopol,
1650: Europe/Sofia, and Europe/Tallinn. This yields slightly smaller
1651: installed data files for Europe/Simferopol and Europe/Tallinn.
1652: It does not affect timestamps. (Thanks to Howard Hinnant.)
1653:
1654: Changes affecting code
1655:
1656: zdump and zic no longer warn about valid time zone abbreviations
1657: like '-05'.
1658:
1659: Some Visual Studio 2013 warnings have been suppressed.
1660: (Thanks to Kees Dekker.)
1661:
1662: 'date' no longer sets the time of day and its -a, -d, -n and -t
1663: options have been removed. Long obsolescent, the implementation
1664: of these features had porting problems. Builders no longer need
1665: to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H.
1666: (Thanks to Kees Dekker for pointing out the problem.)
1667:
1668: Changes affecting documentation
1669:
1670: The Theory file mentions naming issues earlier, as these seem to be
1671: poorly publicized (thanks to Gilmore Davidson for reporting the problem).
1672:
1673: tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant).
1674:
1675: Mention that Herbert Samuel introduced the term "Summer Time".
1676:
1.12 christos 1677:
1678: Release 2015e - 2015-06-13 10:56:02 -0700
1679:
1.25 christos 1680: Changes affecting future timestamps
1.12 christos 1681:
1682: Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00,
1683: not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.)
1684:
1685: Assume Cayman Islands will observe DST starting next year, using US rules.
1686: Although it isn't guaranteed, it is the most likely.
1687:
1688: Changes affecting data format
1689:
1690: The file 'iso3166.tab' now uses UTF-8, so that its entries can better
1691: spell the names of Åland Islands, Côte d'Ivoire, and Réunion.
1692:
1693: Changes affecting code
1694:
1695: When displaying data, tzselect converts it to the current locale's
1696: encoding if the iconv command works. (Problem reported by random832.)
1697:
1698: tzselect no longer mishandles Dominica, fixing a bug introduced
1699: in Release 2014f. (Problem reported by Owen Leibman.)
1700:
1701: zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\".
1702: This fixes a bug introduced in Release 2014f.
1703: (Problem reported by Leonardo Chiquitto.)
1704:
1705:
1.11 christos 1706: Release 2015d - 2015-04-24 08:09:46 -0700
1707:
1.25 christos 1708: Changes affecting future timestamps
1.11 christos 1709:
1710: Egypt will not observe DST in 2015 and will consider canceling it
1711: permanently. For now, assume no DST indefinitely.
1712: (Thanks to Ahmed Nazmy and Tim Parenti.)
1713:
1.25 christos 1714: Changes affecting past timestamps
1.11 christos 1715:
1.17 christos 1716: America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not
1.11 christos 1717: 1966-07-01. Also, Yukon's time zone history is documented better.
1718: (Thanks to Brian Inglis and Dennis Ferguson.)
1719:
1720: Change affecting past and future time zone abbreviations
1721:
1722: The abbreviations for Hawaii-Aleutian standard and daylight times
1723: have been changed from HAST/HADT to HST/HDT, as per US Government
1724: Printing Office style. This affects only America/Adak since 1983,
1725: as America/Honolulu was already using the new style.
1726:
1727: Changes affecting code
1728:
1729: zic has some minor performance improvements.
1730:
1731:
1732: Release 2015c - 2015-04-11 08:55:55 -0700
1733:
1.25 christos 1734: Changes affecting future timestamps
1.11 christos 1735:
1736: Egypt's spring-forward transition is at 24:00 on April's last Thursday,
1737: not 00:00 on April's last Friday. 2015's transition will therefore be on
1738: Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes
1739: apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.)
1740:
1.25 christos 1741: Changes affecting past timestamps
1.11 christos 1742:
1.25 christos 1743: The following changes affect some pre-1991 Chile-related timestamps
1.11 christos 1744: in America/Santiago, Antarctica/Palmer, and Pacific/Easter.
1745:
1746: The 1910 transition was January 10, not January 1.
1747:
1748: The 1918 transition was September 10, not September 1.
1749:
1.17 christos 1750: The UT -04 time observed from 1932 to 1942 is now considered to
1751: be standard time, not year-round DST.
1.11 christos 1752:
1.17 christos 1753: Santiago observed DST (UT -03) from 1946-07-15 through
1754: 1946-08-31, then reverted to standard time, then switched to -05
1755: on 1947-04-01.
1.11 christos 1756:
1757: Assume transitions before 1968 were at 00:00, since we have no data
1758: saying otherwise.
1759:
1760: The spring 1988 transition was 1988-10-09, not 1988-10-02.
1761: The fall 1990 transition was 1990-03-11, not 1990-03-18.
1762:
1.23 christos 1763: Assume no UT offset change for Pacific/Easter on 1890-01-01,
1.11 christos 1764: and omit all transitions on Pacific/Easter from 1942 through 1946
1765: since we have no data suggesting that they existed.
1766:
1767: One more zone has been turned into a link, as it differed
1.25 christos 1768: from an existing zone only for older timestamps. As usual,
1769: this change affects UT offsets in pre-1970 timestamps only.
1.11 christos 1770: The zone's old contents have been moved to the 'backzone' file.
1771: The affected zone is America/Montreal.
1772:
1773: Changes affecting commentary
1774:
1775: Mention the TZUpdater tool.
1776:
1777: Mention "The Time Now". (Thanks to Brandon Ramsey.)
1778:
1779:
1.10 christos 1780: Release 2015b - 2015-03-19 23:28:11 -0700
1781:
1.25 christos 1782: Changes affecting future timestamps
1.10 christos 1783:
1784: Mongolia will start observing DST again this year, from the last
1785: Saturday in March at 02:00 to the last Saturday in September at 00:00.
1786: (Thanks to Ganbold Tsagaankhuu.)
1787:
1788: Palestine will start DST on March 28, not March 27. Also,
1789: correct the fall 2014 transition from September 26 to October 24.
1790: Adjust future predictions accordingly. (Thanks to Steffen Thorsen.)
1791:
1.25 christos 1792: Changes affecting past timestamps
1.10 christos 1793:
1794: The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a
1795: regression. (Thanks to Stuart Bishop for reporting the problem.)
1796:
1797: Some more zones have been turned into links, when they differed
1.25 christos 1798: from existing zones only for older timestamps. As usual,
1799: these changes affect UT offsets in pre-1970 timestamps only.
1.10 christos 1800: Their old contents have been moved to the 'backzone' file.
1801: The affected zones are: America/Antigua, America/Cayman,
1802: Pacific/Midway, and Pacific/Saipan.
1803:
1804: Changes affecting time zone abbreviations
1805:
1806: Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD".
1807: (Thanks to Hank W.)
1808:
1809: Changes affecting code
1810:
1811: Fix integer overflow bug in reference 'mktime' implementation.
1812: (Problem reported by Jörg Richter.)
1813:
1814: Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries
1815: to be used in the same executable as standard-library time_t functions.
1816: (Problems reported by Bradley White.)
1817:
1818: Changes affecting commentary
1819:
1820: Cite the recent Mexican decree changing Quintana Roo's time zone.
1821: (Thanks to Carlos Raúl Perasso.)
1822:
1823: Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.)
1824:
1825: Update info about Mars time.
1826:
1827:
1.9 christos 1828: Release 2015a - 2015-01-29 22:35:20 -0800
1829:
1.25 christos 1830: Changes affecting future timestamps
1.9 christos 1831:
1832: The Mexican state of Quintana Roo, represented by America/Cancun,
1833: will shift from Central Time with DST to Eastern Time without DST
1834: on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.)
1835:
1836: Chile will not change clocks in April or thereafter; its new standard time
1837: will be its old daylight saving time. This affects America/Santiago,
1838: Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.)
1839:
1840: New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49.
1841: (Thanks to Tim Parenti.)
1842:
1.25 christos 1843: Changes affecting past timestamps
1.9 christos 1844:
1845: Iceland observed DST in 1919 and 1921, and its 1939 fallback
1846: transition was Oct. 29, not Nov. 29. Remove incorrect data from
1847: Shanks about time in Iceland between 1837 and 1908.
1848:
1849: Some more zones have been turned into links, when they differed
1.25 christos 1850: from existing zones only for older timestamps. As usual,
1851: these changes affect UT offsets in pre-1970 timestamps only.
1.9 christos 1852: Their old contents have been moved to the 'backzone' file.
1853: The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait,
1854: and Asia/Muscat.
1855:
1856: Changes affecting code
1857:
1858: tzalloc now scrubs time zone abbreviations compatibly with the way
1859: that tzset always has, by replacing invalid bytes with '_' and by
1860: shortening too-long abbreviations.
1861:
1862: tzselect ports to POSIX awk implementations, no longer mishandles
1863: POSIX TZ settings when GNU awk is used, and reports POSIX TZ
1864: settings to the user. (Thanks to Stefan Kuhn.)
1865:
1866: Changes affecting build procedure
1867:
1868: 'make check' now checks for links to links in the data.
1869: One such link (for Africa/Asmera) has been fixed.
1870: (Thanks to Stephen Colebourne for pointing out the problem.)
1871:
1872: Changes affecting commentary
1873:
1874: The leapseconds file commentary now mentions the expiration date.
1875: (Problem reported by Martin Burnicki.)
1876:
1877: Update Mexican Library of Congress URL.
1878:
1879:
1.8 christos 1880: Release 2014j - 2014-11-10 17:37:11 -0800
1881:
1.25 christos 1882: Changes affecting current and future timestamps
1.8 christos 1883:
1.17 christos 1884: Turks & Caicos' switch from US eastern time to UT -04 year-round
1.8 christos 1885: did not occur on 2014-11-02 at 02:00. It's currently scheduled
1886: for 2015-11-01 at 02:00. (Thanks to Chris Walton.)
1887:
1.25 christos 1888: Changes affecting past timestamps
1.8 christos 1889:
1.25 christos 1890: Many pre-1989 timestamps have been corrected for Asia/Seoul and
1.8 christos 1891: Asia/Pyongyang, based on sources for the Korean-language Wikipedia
1892: entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no
1893: longer guess that Pyongyang mimicked Seoul time after World War II,
1894: as this is politically implausible.
1895:
1896: Some more zones have been turned into links, when they differed
1.25 christos 1897: from existing zones only for older timestamps. As usual,
1898: these changes affect UT offsets in pre-1970 timestamps only.
1.8 christos 1899: Their old contents have been moved to the 'backzone' file.
1900: The affected zones are: Africa/Addis_Ababa, Africa/Asmara,
1901: Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala,
1902: Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and
1903: Indian/Mayotte.
1904:
1905: Changes affecting commentary
1906:
1907: The commentary is less enthusiastic about Shanks as a source,
1908: and is more careful to distinguish UT from UTC.
1909:
1910:
1.7 christos 1911: Release 2014i - 2014-10-21 22:04:57 -0700
1912:
1.25 christos 1913: Changes affecting future timestamps
1.7 christos 1914:
1915: Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00.
1916: (Thanks to Ken Rylander for the heads-up.) Guess that future
1917: years will use a similar pattern.
1918:
1919: A new Zone Pacific/Bougainville, for the part of Papua New Guinea
1.17 christos 1920: that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00.
1.7 christos 1921: (Thanks to Kiley Walbom for the heads-up.)
1922:
1923: Changes affecting time zone abbreviations
1924:
1925: Since Belarus is not changing its clocks even though Moscow is,
1926: the time zone abbreviation in Europe/Minsk is changing from FET
1927: to its more-traditional value MSK on 2014-10-26 at 01:00.
1928: (Thanks to Alexander Bokovoy for the heads-up about Belarus.)
1929:
1.17 christos 1930: The new abbreviation IDT stands for the pre-1976 use of UT +08 in
1931: Indochina, to distinguish it better from ICT (+07).
1.7 christos 1932:
1.25 christos 1933: Changes affecting past timestamps
1.7 christos 1934:
1.25 christos 1935: Many timestamps have been corrected for Asia/Ho_Chi_Minh before 1976
1.7 christos 1936: (thanks to Trần Ngọc Quân for an indirect pointer to Trần Tiến Bình's
1937: authoritative book). Asia/Ho_Chi_Minh has been added to
1938: zone1970.tab, to give tzselect users in Vietnam two choices,
1939: since north and south Vietnam disagreed after our 1970 cutoff.
1940:
1941: Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as
1.25 christos 1942: they differed from existing zones only for older timestamps. As
1943: usual, these changes affect pre-1970 timestamps only. Their old
1.7 christos 1944: contents have been moved to the 'backzone' file.
1945:
1946: Changes affecting code
1947:
1948: The time-related library functions now set errno on failure, and
1949: some crashes in the new tzalloc-related library functions have
1950: been fixed. (Thanks to Christos Zoulas for reporting most of
1951: these problems and for suggesting fixes.)
1952:
1.20 christos 1953: If USG_COMPAT is defined and the requested timestamp is standard time,
1.7 christos 1954: the tz library's localtime and mktime functions now set the extern
1.20 christos 1955: variable timezone to a value appropriate for that timestamp; and
1.7 christos 1956: similarly for ALTZONE, daylight saving time, and the altzone variable.
1957: This change is a companion to the tzname change in 2014h, and is
1958: designed to make timezone and altzone more compatible with tzname.
1959:
1960: The tz library's functions now set errno to EOVERFLOW if they fail
1961: because the result cannot be represented. ctime and ctime_r now
1.20 christos 1962: return NULL and set errno when a timestamp is out of range, rather
1.7 christos 1963: than having undefined behavior.
1964:
1965: Some bugs associated with the new 2014g functions have been fixed.
1966: This includes a bug that largely incapacitated the new functions
1967: time2posix_z and posix2time_z. (Thanks to Christos Zoulas.)
1968: It also includes some uses of uninitialized variables after tzalloc.
1969: The new code uses the standard type 'ssize_t', which the Makefile
1970: now gives porting advice about.
1971:
1972: Changes affecting commentary
1973:
1974: Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis).
1975:
1976:
1.6 christos 1977: Release 2014h - 2014-09-25 18:59:03 -0700
1978:
1.20 christos 1979: Changes affecting past timestamps
1.6 christos 1980:
1981: America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28.
1982:
1983: Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01,
1984: not 1920-01-06. The old entry was based on a misinterpretation of Shanks.
1985:
1986: Some more zones have been turned into links, when they differed
1.20 christos 1987: from existing zones only for older timestamps. As usual,
1.23 christos 1988: these changes affect UT offsets in pre-1970 timestamps only.
1.6 christos 1989: Their old contents have been moved to the 'backzone' file.
1990: The affected zones are: Africa/Blantyre, Africa/Bujumbura,
1991: Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
1992: Africa/Lusaka, Africa/Maseru, and Africa/Mbabane.
1993:
1994: Changes affecting code
1995:
1996: zdump -V and -v now output gmtoff= values on all platforms,
1997: not merely on platforms defining TM_GMTOFF.
1998:
1999: The tz library's localtime and mktime functions now set tzname to a value
1.20 christos 2000: appropriate for the requested timestamp, and zdump now uses this
1.6 christos 2001: on platforms not defining TM_ZONE, fixing a 2014g regression.
2002: (Thanks to Tim Parenti for reporting the problem.)
2003:
2004: The tz library no longer sets tzname if localtime or mktime fails.
2005:
2006: zdump -c no longer mishandles transitions near year boundaries.
2007: (Thanks to Tim Parenti for reporting the problem.)
2008:
1.17 christos 2009: An access to uninitialized data has been fixed.
1.6 christos 2010: (Thanks to Jörg Richter for reporting the problem.)
2011:
2012: When THREAD_SAFE is defined, the code ports to the C11 memory model.
2013: A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined
2014: and two threads race to initialize data used by gmtime-like functions.
2015: (Thanks to Andy Heninger for reporting the problems.)
2016:
2017: Changes affecting build procedure
2018:
2019: 'make check' now checks better for properly-sorted data.
2020:
2021: Changes affecting documentation and commentary
2022:
2023: zdump's gmtoff=N output is now documented, and its isdst=D output
2024: is now documented to possibly output D values other than 0 or 1.
2025:
2026: zdump -c's treatment of years is now documented to use the
2027: Gregorian calendar and Universal Time without leap seconds,
2028: and its behavior at cutoff boundaries is now documented better.
2029: (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.)
2030:
2031: Programs are now documented to use the proleptic Gregorian calendar.
2032: (Thanks to Alan Barrett for the suggestion.)
2033:
2034: Fractional-second GMT offsets have been documented for civil time
2035: in 19th-century Chennai, Jakarta, and New York.
2036:
2037:
2038: Release 2014g - 2014-08-28 12:31:23 -0700
2039:
1.20 christos 2040: Changes affecting future timestamps
1.6 christos 2041:
1.17 christos 2042: Turks & Caicos is switching from US eastern time to UT -04
2043: year-round, modeled as a switch on 2014-11-02 at 02:00.
1.8 christos 2044: [As noted in 2014j, this switch was later delayed.]
1.6 christos 2045:
1.20 christos 2046: Changes affecting past timestamps
1.6 christos 2047:
2048: Time in Russia or the USSR before 1926 or so has been corrected by
2049: a few seconds in the following zones: Asia/Irkutsk,
2050: Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi,
2051: Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For
2052: Asia/Yekaterinburg the correction is a few minutes. (Thanks to
2053: Vladimir Karpinsky.)
2054:
2055: The Portuguese decree of 1911-05-26 took effect on 1912-01-01.
1.20 christos 2056: This affects 1911 timestamps in Africa/Bissau, Africa/Luanda,
1.6 christos 2057: Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912
2058: GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32.
2059: (Thanks to Stephen Colebourne for pointing to the decree.)
2060:
2061: Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59.
2062:
2063: A new file 'backzone' contains data which may appeal to
1.20 christos 2064: connoisseurs of old timestamps, although it is out of scope for
1.6 christos 2065: the tz database, is often poorly sourced, and contains some data
2066: that is known to be incorrect. The new file is not recommended
2067: for ordinary use and its entries are not installed by default.
2068: (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and
2069: Isle of Man entries.)
2070:
2071: Some more zones have been turned into links, when they differed
1.20 christos 2072: from existing zones only for older timestamps. As usual,
1.23 christos 2073: these changes affect UT offsets in pre-1970 timestamps only.
1.6 christos 2074: Their old contents have been moved to the 'backzone' file.
2075: The affected zones are: Africa/Bangui, Africa/Brazzaville,
2076: Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda,
2077: Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo.
2078:
2079: Changes affecting code
2080:
2081: Unless NETBSD_INSPIRED is defined to 0, the tz library now
2082: supplies functions for creating and using objects that represent
1.25 christos 2083: timezones. The new functions are tzalloc, tzfree, localtime_rz,
1.6 christos 2084: mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and
2085: time2posix_z. They are intended for performance: for example,
2086: localtime_rz (unlike localtime_r) is trivially thread-safe without
2087: locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired
2088: functions, and to Alan Barrett and Jonathan Lennox for helping to
2089: debug the change.)
2090:
2091: zdump now builds with the tz library unless USE_LTZ is defined to 0,
2092: This lets zdump use tz features even if the system library lacks them.
2093: To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0
2094: TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='.
2095:
2096: zdump now uses localtime_rz if available, as it's significantly faster,
1.25 christos 2097: and it can help zdump better diagnose invalid timezone names.
1.6 christos 2098: Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ
2099: defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is
2100: not available, zdump now uses localtime_r and tzset if available,
2101: as this is a bit cleaner and faster than plain localtime. Compile
2102: with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system
2103: lacks these two functions.
2104:
2105: If THREAD_SAFE is defined to 1, the tz library is now thread-safe.
2106: Although not needed for tz's own applications, which are single-threaded,
2107: this supports POSIX better if the tz library is used in multithreaded apps.
2108:
2109: Some crashes have been fixed when zdump or the tz library is given
2110: invalid or outlandish input.
2111:
2112: The tz library no longer mishandles leap seconds on platforms with
1.25 christos 2113: unsigned time_t in timezones that lack ordinary transitions after 1970.
1.6 christos 2114:
2115: The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not
2116: already defined, to make it easier to configure on common platforms.
2117: Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this.
2118:
2119: Unless the new macro UNINIT_TRAP is defined to 1, the tz code now
2120: assumes that reading uninitialized memory yields garbage values
2121: but does not cause other problems such as traps.
2122:
2123: If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now
1.20 christos 2124: more likely to guess right for ambiguous timestamps near
1.6 christos 2125: transitions where tm_isdst does not change.
2126:
2127: If HAVE_STRFTIME_L is defined to 1, the tz library now defines
2128: strftime_l for compatibility with recent versions of POSIX.
2129: Only the C locale is supported, though. HAVE_STRFTIME_L defaults
2130: to 1 on recent POSIX versions, and to 0 otherwise.
2131:
2132: tzselect -c now uses a hybrid distance measure that works better
2133: in Africa. (Thanks to Alan Barrett for noting the problem.)
2134:
2135: The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used,
2136: or when time_tz is defined.
2137:
2138: When HAVE_UTMPX_H is set the 'date' command now builds on systems
2139: whose <utmpx.h> file does not define WTMPX_FILE, and when setting
2140: the date it updates the wtmpx file if _PATH_WTMPX is defined.
2141: This affects GNU/Linux and similar systems.
2142:
2143: For easier maintenance later, some C code has been simplified,
2144: some lint has been removed, and the code has been tweaked so that
2145: plain 'make' is more likely to work.
2146:
2147: The C type 'bool' is now used for boolean values, instead of 'int'.
2148:
2149: The long-obsolete LOCALE_HOME code has been removed.
2150:
2151: The long-obsolete 'gtime' function has been removed.
2152:
2153: Changes affecting build procedure
2154:
2155: 'zdump' no longer links in ialloc.o, as it's not needed.
2156:
2157: 'make check_time_t_alternatives' no longer assumes GNU diff.
2158:
2159: Changes affecting distribution tarballs
2160:
2161: The files checktab.awk and zoneinfo2tdf.pl are now distributed in
2162: the tzdata tarball instead of the tzcode tarball, since they help
2163: maintain the data. The NEWS and Theory files are now also
2164: distributed in the tzdata tarball, as they're relevant for data.
2165: (Thanks to Alan Barrett for pointing this out.) Also, the
2166: leapseconds.awk file is no longer distributed in the tzcode
2167: tarball, since it belongs in the tzdata tarball (where 2014f
2168: inadvertently also distributed it).
2169:
2170: Changes affecting documentation and commentary
2171:
2172: A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for
2173: suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms
2174: for debugging it.)
2175:
2176: The man pages have been updated to use function prototypes,
2177: to document thread-safe variants like localtime_r, and to document
2178: the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and
2179: mktime_z.
2180:
2181: The fields in Link lines have been renamed to be more descriptive
2182: and more like the parameters of 'ln'. LINK-FROM has become TARGET,
2183: and LINK-TO has become LINK-NAME.
2184:
2185: tz-link.htm mentions the IETF's tzdist working group; Windows
2186: Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab.
2187:
2188: Some broken URLs have been fixed in the commentary. (Thanks to
2189: Lester Caine.)
2190:
2191: Commentary about Philippines DST has been updated, and commentary
2192: on pre-1970 time in India has been added.
2193:
2194:
1.5 christos 2195: Release 2014f - 2014-08-05 17:42:36 -0700
2196:
1.20 christos 2197: Changes affecting future timestamps
1.5 christos 2198:
2199: Russia will subtract an hour from most of its time zones on 2014-10-26
2200: at 02:00 local time. (Thanks to Alexander Krivenyshev.)
2201: There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky
2202: Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug
2203: (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast
2204: (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic
2205: (Europe/Samara) are not changing their clocks. The changed zones are
2206: Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd,
2207: Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk,
2208: Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga,
2209: Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours
2210: subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected,
2211: but not its UTC offset. Two zones are added: Asia/Chita (split
2212: from Asia/Yakutsk, and also with two hours subtracted) and
2213: Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour
2214: subtracted). (Thanks to Tim Parenti for much of the above.)
2215:
2216: Changes affecting time zone abbreviations
2217:
2218: Australian eastern time zone abbreviations are now AEST/AEDT not EST,
2219: and similarly for the other Australian zones. That is, for eastern
2220: standard and daylight saving time the abbreviations are AEST and AEDT
2221: instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT,
2222: and AWST/AWDT are now used instead of the former CST, CWST, and WST.
1.23 christos 2223: This change does not affect UT offsets, only time zone abbreviations.
1.5 christos 2224: (Thanks to Rich Tibbett and many others.)
2225:
1.17 christos 2226: Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07)
1.5 christos 2227: effective 2014-10-26 at 02:00 local time.
2228:
2229: The time zone abbreviation for Xinjiang Time (observed in Ürümqi)
2230: has been changed from URUT to XJT. (Thanks to Luther Ma.)
2231:
2232: Prefer MSK/MSD for Moscow time in Russia, even in other cities.
2233: Similarly, prefer EET/EEST for eastern European time in Russia.
2234:
2235: Change time zone abbreviations in (western) Samoa to use "ST" and
2236: "DT" suffixes, as this is more likely to match common practice.
2237: Prefix "W" to (western) Samoa time when its standard-time offset
2238: disagrees with that of American Samoa.
2239:
2240: America/Metlakatla now uses PST, not MeST, to abbreviate its time zone.
2241:
2242: Time zone abbreviations have been updated for Japan's two time
2243: zones used 1896-1937. JWST now stands for Western Standard
2244: Time, and JCST for Central Standard Time (formerly this was CJT).
2245: These abbreviations are now used for time in Korea, Taiwan,
2246: and Sakhalin while controlled by Japan.
2247:
1.20 christos 2248: Changes affecting past timestamps
1.5 christos 2249:
2250: China's five zones have been simplified to two, since the post-1970
2251: differences in the other three seem to have been imaginary. The
2252: zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been
2253: removed; backwards-compatibility links still work, albeit with
1.20 christos 2254: different behaviors for timestamps before May 1980. Asia/Urumqi's
1.17 christos 2255: 1980 transition to UT +08 has been removed, so that it is now at
2256: +06 and not +08. (Thanks to Luther Ma and to Alois Treindl;
1.5 christos 2257: Treindl sent helpful translations of two papers by Guo Qingsheng.)
2258:
2259: Some zones have been turned into links, when they differed from existing
1.23 christos 2260: zones only for older UT offsets where data entries were likely invented.
2261: These changes affect UT offsets in pre-1970 timestamps only. This is
1.5 christos 2262: similar to the change in release 2013e, except this time for western
2263: Africa. The affected zones are: Africa/Bamako, Africa/Banjul,
2264: Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome,
2265: Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and
2266: Atlantic/St_Helena. This also affects the backwards-compatibility
2267: link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne,
2268: Tim Parenti, and David Patte for reporting problems in earlier
2269: versions of this change.)
2270:
2271: Asia/Shanghai's pre-standard-time UT offset has been changed from
2272: 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its
2273: transition to standard time has been changed from 1928 to 1901.
2274:
2275: Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01,
2276: then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945.
2277: In 1946 it observed DST from 05-15 through 09-30; in 1947
2278: from 04-15 through 10-31; and in 1979 from 07-01 through 09-30.
2279: (Thanks to Yu-Cheng Chuang.)
2280:
2281: Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950.
2282:
2283: Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not
2284: 10-03 at 00:00. (Thanks to Konstantin Hyppönen.)
2285:
1.17 christos 2286: Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the
2287: period from 1911 to 1950.
1.5 christos 2288:
2289: Pacific/Chatham has been changed to New Zealand standard time plus
2290: 45 minutes for the period before 1957, reflecting a 1956 remark in
2291: the New Zealand parliament.
2292:
2293: Europe/Budapest has several pre-1946 corrections: in 1918 the transition
2294: out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in
2295: 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08
2296: not 04-06 at 02:00; and there was no DST in 1920.
2297:
2298: Africa/Accra is now assumed to have observed DST from 1920 through 1935.
2299:
2300: Time in Russia before 1927 or so has been corrected by a few seconds in
2301: the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi,
2302: Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and
2303: Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0
2304: point. (Thanks to Vladimir Karpinsky for the Moscow changes.)
2305:
2306: Changes affecting data format
2307:
2308: A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data.
2309: The new file's extended format allows multiple country codes per zone.
2310: The older file is still installed but is deprecated; its format is
2311: not changing and it will still be distributed for a while, but new
2312: applications should use the new file.
2313:
2314: The new file format simplifies maintenance of obscure locations.
2315: To test this, it adds coverage for the Crozet Islands and the
2316: Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.)
2317:
2318: The file 'iso3166.tab' is planned to switch from ASCII to UTF-8.
2319: It is still ASCII now, but commentary about the switch has been added.
2320: The new file 'zone1970.tab' already uses UTF-8.
2321:
2322: Changes affecting code
2323:
2324: 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE
2325: is defined. (Thanks to Elliott Hughes for reporting the problem.)
2326:
2327: 'zic' no longer mishandles input when ignoring case in locales that
2328: are not compatible with English, e.g., unibyte Turkish locales when
2329: compiled with HAVE_GETTEXT.
2330:
2331: Error diagnostics of 'zic' and 'yearistype' have been reworded so that
2332: they no longer use ASCII '-' as if it were a dash.
2333:
2334: 'zic' now rejects output file names that contain '.' or '..' components.
2335: (Thanks to Tim Parenti for reporting the problem.)
2336:
2337: 'zic -v' now warns about output file names that do not follow
2338: POSIX rules, or that contain a digit or '.'. (Thanks to Arthur
2339: David Olson for starting the ball rolling on this.)
2340:
2341: Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0.
2342:
2343: Changes affecting build procedure
2344:
2345: 'zic' no longer links in localtime.o and asctime.o, as they're not needed.
2346: (Thanks to John Cochran.)
2347:
2348: Changes affecting documentation and commentary
2349:
2350: The 'Theory' file documents legacy names, the longstanding
2351: exceptions to the POSIX-inspired file name rules.
2352:
2353: The 'zic' documentation clarifies the role of time types when
2354: interpreting dates. (Thanks to Arthur David Olson.)
2355:
2356: Documentation and commentary now prefer UTF-8 to US-ASCII,
2357: allowing the use of proper accents in foreign words and names.
2358: Code and data have not changed because of this. (Thanks to
2359: Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug
2360: this.)
2361:
2362: Non-HTML documentation and commentary now use plain-text URLs instead of
2363: HTML insertions, and are more consistent about bracketing URLs when they
2364: are not already surrounded by white space. (Thanks to suggestions by
2365: Steffen Nurpmeso.)
2366:
1.6 christos 2367: There is new commentary about Xujiahui Observatory, the five time-zone
1.5 christos 2368: project in China from 1918 to 1949, timekeeping in Japanese-occupied
2369: Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the
2370: warlord Jin Shuren in the data.
2371:
2372: Commentary about the coverage of each Russian zone has been standardized.
1.29 ! christos 2373: (Thanks to Tim Parenti.)
1.5 christos 2374:
2375: There is new commentary about contemporary timekeeping in Ethiopia.
2376:
2377: Obsolete comments about a 2007 proposal for DST in Kuwait has been removed.
2378:
2379: There is new commentary about time in Poland in 1919.
2380:
2381: Proper credit has been given to DST inventor George Vernon Hudson.
2382:
2383: Commentary about time in Metlakatla, AK and Resolute, NU has been
2384: improved, with a new source for the former.
2385:
2386: In zone.tab, Pacific/Easter no longer mentions Salas y Gómez, as it
2387: is uninhabited.
2388:
2389: Commentary about permanent Antarctic bases has been updated.
2390:
2391: Several typos have been corrected. (Thanks to Tim Parenti for
2392: contributing some of these fixes.)
2393:
2394: tz-link.htm now mentions the JavaScript libraries Moment Timezone,
2395: TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up
2396: from Matt Johnson.) Also, it mentions the Go 'latlong' package.
2397: (Thanks to a heads-up from Dirkjan Ochtman.)
2398:
2399: The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998
2400: have been removed. These obsolescent US Naval Observatory entries were no
2401: longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.)
2402:
2403:
1.4 christos 2404: Release 2014e - 2014-06-12 21:53:52 -0700
2405:
1.20 christos 2406: Changes affecting near-future timestamps
1.4 christos 2407:
2408: Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00.
2409: (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily
2410: switch to standard time at 24:00 the last Thursday before Ramadan, and
2411: back to DST at 00:00 the first Friday after Ramadan.
2412:
2413: Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks
2414: to Milamber Space Network.) Guess that from 2015 on Morocco will
2415: temporarily switch to standard time at 03:00 the last Saturday before
2416: Ramadan, and back to DST at 02:00 the first Saturday after Ramadan.
2417:
1.20 christos 2418: Changes affecting past timestamps
1.4 christos 2419:
2420: The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of
2421: "MSD" for Moscow's double daylight time in summer 1921. Also, a typo
2422: "VLASST" has been repaired to be "VLAST" for Vladivostok summer time
2423: in 1991. (Thanks to Hank W. for reporting the problems.)
2424:
2425: Changes affecting commentary
2426:
2427: tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the
2428: draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and
2429: removes stale pointers to World Time Explorer and WORLDTIME.
2430:
1.2 christos 2431:
1.3 christos 2432: Release 2014d - 2014-05-27 21:34:40 -0700
2433:
2434: Changes affecting code
2435:
1.20 christos 2436: zic no longer generates files containing timestamps before the Big Bang.
1.25 christos 2437: This works around GNOME glib bug 878
2438: <https://gitlab.gnome.org/GNOME/glib/issues/878>
1.3 christos 2439: (Thanks to Leonardo Chiquitto for reporting the bug, and to
2440: Arthur David Olson and James Cloos for suggesting improvements to the fix.)
2441:
2442: Changes affecting documentation
2443:
2444: tz-link.htm now mentions GNOME.
2445:
2446:
1.2 christos 2447: Release 2014c - 2014-05-13 07:44:13 -0700
2448:
1.20 christos 2449: Changes affecting near-future timestamps
1.2 christos 2450:
1.3 christos 2451: Egypt observes DST starting 2014-05-15 at 24:00.
2452: (Thanks to Ahmad El-Dardiry and Gunther Vermier.)
1.2 christos 2453: Details have not been announced, except that DST will not be observed
2454: during Ramadan. Guess that DST will stop during the same Ramadan dates as
2455: Morocco, and that Egypt's future spring and fall transitions will be the
2456: same as 2010 when it last observed DST, namely April's last Friday at
2457: 00:00 to September's last Thursday at 23:00 standard time. Also, guess
2458: that Ramadan transitions will be at 00:00 standard time.
2459:
2460: Changes affecting code
2461:
2462: zic now generates transitions for minimum time values, eliminating guesswork
1.20 christos 2463: when handling low-valued timestamps. (Thanks to Arthur David Olson.)
1.2 christos 2464:
2465: Port to Cygwin sans glibc. (Thanks to Arthur David Olson.)
2466:
2467: Changes affecting commentary and documentation
2468:
2469: Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.)
2470:
2471:
2472: Release 2014b - 2014-03-24 21:28:50 -0700
2473:
1.20 christos 2474: Changes affecting near-future timestamps
1.2 christos 2475:
2476: Crimea switches to Moscow time on 2014-03-30 at 02:00 local time.
2477: (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU.
2478:
2479: New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and
2480: Bengt-Inge Larsson.) This is currently an approximation; a better version
2481: will require the zic and localtime fixes mentioned below, and the plan is
2482: to wait for a while until at least the zic fixes propagate.
2483:
2484: Changes affecting code
2485:
2486: 'zic' and 'localtime' no longer reject locations needing four transitions
1.6 christos 2487: per year for the foreseeable future. (Thanks to Andrew Main (Zefram).)
1.2 christos 2488: Also, 'zic' avoids some unlikely failures due to integer overflow.
2489:
2490: Changes affecting build procedure
2491:
2492: 'make check' now detects Rule lines defined but never used.
2493: The NZAQ rules, an instance of this problem, have been removed.
2494:
2495: Changes affecting commentary and documentation
2496:
2497: Fix Tuesday/Thursday typo in description of time in Israel.
2498: (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.)
2499:
2500: Microsoft Windows 8.1 doesn't support tz database names. (Thanks
2501: to Donald MacQueen.) Instead, the Microsoft Windows Store app
2502: library supports them.
2503:
2504: Add comments about Johnston Island time in the 1960s.
2505: (Thanks to Lyle McElhaney.)
2506:
2507: Morocco's 2014 DST start will be as predicted.
2508: (Thanks to Sebastien Willemijns.)
2509:
2510:
2511: Release 2014a - 2014-03-07 23:30:29 -0800
2512:
1.20 christos 2513: Changes affecting near-future timestamps
1.2 christos 2514:
2515: Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for
2516: the heads-up, and to Tim Parenti for simplifying the update.)
2517:
1.20 christos 2518: Changes affecting past timestamps
1.2 christos 2519:
2520: Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00.
2521: (Thanks to Steffen Thorsen.)
2522:
2523: Ukraine switched from Moscow to Eastern European time on 1990-07-01
2524: (not 1992-01-01), and observed DST during the entire next winter.
2525: (Thanks to Vladimir in Moscow via Alois Treindl.)
2526:
2527: In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03.
2528: (Thanks to Avigdor Finkelstein.)
2529:
2530: Changes affecting code
2531:
2532: A uninitialized-storage bug in 'localtime' has been fixed.
2533: (Thanks to Logan Chien.)
2534:
2535: Changes affecting the build procedure
2536:
2537: The settings for 'make check_web' now default to Ubuntu 13.10.
2538:
2539: Changes affecting commentary and documentation
2540:
2541: The boundary of the US Pacific time zone is given more accurately.
2542: (Thanks to Alan Mintz.)
2543:
1.5 christos 2544: Chile's 2014 DST will be as predicted. (Thanks to José Miguel Garrido.)
1.2 christos 2545:
1.5 christos 2546: Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Raúl Perasso.)
1.2 christos 2547:
2548: Better descriptions of countries with same time zone history as
2549: Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.)
2550:
2551: Several changes affect tz-link.htm, the main web page.
2552:
2553: Mention Time.is (thanks to Even Scharning) and WX-now (thanks to
2554: David Braverman).
2555:
2556: Mention xCal (Internet RFC 6321) and jCal.
2557:
2558: Microsoft has some support for tz database names.
2559:
1.6 christos 2560: CLDR data formats include both XML and JSON.
1.2 christos 2561:
2562: Mention Maggiolo's map of solar vs standard time.
2563: (Thanks to Arthur David Olson.)
2564:
2565: Mention TZ4Net. (Thanks to Matt Johnson.)
2566:
2567: Mention the timezone-olson Haskell package.
2568:
1.5 christos 2569: Mention zeitverschiebung.net. (Thanks to Martin Jäger.)
1.2 christos 2570:
2571: Remove moribund links to daylight-savings-time.info and to
2572: Simple Timer + Clocks.
2573:
2574: Update two links. (Thanks to Oscar van Vlijmen.)
2575:
2576: Fix some formatting glitches, e.g., remove random newlines from
2577: abbr elements' title attributes.
2578:
2579:
1.1 christos 2580: Release 2013i - 2013-12-17 07:25:23 -0800
2581:
1.20 christos 2582: Changes affecting near-future timestamps:
1.1 christos 2583:
2584: Jordan switches back to standard time at 00:00 on December 20, 2013.
2585: The 2006-2011 transition schedule is planned to resume in 2014.
2586: (Thanks to Steffen Thorsen.)
2587:
1.20 christos 2588: Changes affecting past timestamps:
1.1 christos 2589:
2590: In 2004, Cuba began DST on March 28, not April 4.
2591: (Thanks to Steffen Thorsen.)
2592:
2593: Changes affecting code
2594:
2595: The compile-time flag NOSOLAR has been removed, as nowadays the
2596: benefit of slightly shrinking runtime table size is outweighed by the
2597: cost of disallowing potential future updates that exceed old limits.
2598:
2599: Changes affecting documentation and commentary
2600:
2601: The files solar87, solar88, and solar89 are no longer distributed.
1.5 christos 2602: They were a negative experiment - that is, a demonstration that
1.1 christos 2603: tz data can represent solar time only with some difficulty and error.
2604: Their presence in the distribution caused confusion, as Riyadh
2605: civil time was generally not solar time in those years.
2606:
2607: tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.)
2608:
1.2 christos 2609:
1.1 christos 2610: Release 2013h - 2013-10-25 15:32:32 -0700
2611:
1.20 christos 2612: Changes affecting current and future timestamps:
1.1 christos 2613:
1.17 christos 2614: Libya has switched its UT offset back to +02 without DST, instead
2615: of +01 with DST. (Thanks to Even Scharning.)
1.1 christos 2616:
2617: Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules.
2618: (Thanks to Gwillim Law.)
2619:
1.20 christos 2620: Changes affecting future timestamps:
1.1 christos 2621:
1.17 christos 2622: Acre and (we guess) western Amazonas will switch from UT -04 to -05
1.1 christos 2623: on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe.
2624: (Thanks to Steffen Thorsen.)
2625:
2626: Add entries for DST transitions in Morocco in the year 2038.
2627: This avoids some year-2038 glitches introduced in 2013g.
2628: (Thanks to Yoshito Umaoka for reporting the problem.)
2629:
2630: Changes affecting API
2631:
2632: The 'tzselect' command no longer requires the 'select' command,
2633: and should now work with /bin/sh on more platforms. It also works
2634: around a bug in BusyBox awk before version 1.21.0. (Thanks to
1.5 christos 2635: Patrick 'P. J.' McDermott and Alan Barrett.)
1.1 christos 2636:
2637: Changes affecting code
2638:
2639: Fix localtime overflow bugs with 32-bit unsigned time_t.
2640:
2641: zdump no longer assumes sscanf returns maximal values on overflow.
2642:
2643: Changes affecting the build procedure
2644:
2645: The builder can specify which programs to use, if any, instead of
2646: 'ar' and 'ranlib', and libtz.a is now built locally before being
2647: installed. (Thanks to Michael Forney.)
2648:
2649: A dependency typo in the 'zdump' rule has been fixed.
2650: (Thanks to Andrew Paprocki.)
2651:
2652: The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f'
2653: work as specified by POSIX.2-1992 or later; this is portable nowadays.
2654:
2655: 'make clean' no longer removes 'leapseconds', since it's
2656: host-independent and is part of the distribution.
2657:
2658: The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed.
2659:
2660: Changes affecting documentation and commentary
2661:
1.6 christos 2662: tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol
1.1 christos 2663: (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle).
2664:
2665: Update URLs in tz-link page. Add URLs for Microsoft Windows, since
2666: 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no
2667: longer maintained) and for old advisories. SOFA now does C.
2668:
2669: Release 2013g - 2013-09-30 21:08:26 -0700
2670:
1.20 christos 2671: Changes affecting current and near-future timestamps
1.1 christos 2672:
2673: Morocco now observes DST from the last Sunday in March to the last
2674: Sunday in October, not April to September respectively. (Thanks
2675: to Steffen Thorsen.)
2676:
2677: Changes affecting 'zic'
2678:
2679: 'zic' now runs on platforms that lack both hard links and symlinks.
2680: (Thanks to Theo Veenker for reporting the problem, for MinGW.)
2681: Also, fix some bugs on platforms that lack hard links but have symlinks.
2682:
2683: 'zic -v' again warns that Asia/Tehran has no POSIX environment variable
2684: to predict the far future, fixing a bug introduced in 2013e.
2685:
2686: Changes affecting the build procedure
2687:
2688: The 'leapseconds' file is again put into the tzdata tarball.
2689: Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to
2690: Matt Burgess and Ian Abbott.) The timestamps of these and other
2691: dependent files in tarballs are adjusted more consistently.
2692:
2693: Changes affecting documentation and commentary
2694:
2695: The README file is now part of the data tarball as well as the code.
2696: It now states that files are public domain unless otherwise specified.
2697: (Thanks to Andrew Main (Zefram) for asking for clarifications.)
2698: Its details about the 1989 release moved to a place of honor near
2699: the end of NEWS.
2700:
2701:
2702: Release 2013f - 2013-09-24 23:37:36 -0700
2703:
1.20 christos 2704: Changes affecting near-future timestamps
1.1 christos 2705:
2706: Tocantins will very likely not observe DST starting this spring.
2707: (Thanks to Steffen Thorsen.)
2708:
1.17 christos 2709: Jordan will likely stay at UT +03 indefinitely, and will not fall
1.1 christos 2710: back this fall.
2711:
2712: Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.)
2713:
2714: Changes affecting API
2715:
2716: The types of the global variables 'timezone' and 'altzone' (if present)
2717: have been changed back to 'long'. This is required for 'timezone'
2718: by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
2719: These variables were originally 'long' in the tz code, but were
2720: mistakenly changed to 'time_t' in 1987; nobody reported the
2721: incompatibility until now. The difference matters on x32, where
2722: 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.)
2723:
2724: Changes affecting the build procedure
2725:
2726: Avoid long strings in leapseconds.awk to work around a mawk bug.
2727: (Thanks to Cyril Baurand.)
2728:
2729: Changes affecting documentation and commentary
2730:
2731: New file 'NEWS' that contains release notes like this one.
2732:
2733: Paraguay's law does not specify DST transition time; 00:00 is customary.
2734: (Thanks to Waldemar Villamayor-Venialbo.)
2735:
2736: Minor capitalization fixes.
2737:
2738: Changes affecting version-control only
2739:
1.6 christos 2740: The experimental GitHub repository now contains annotated and
1.1 christos 2741: signed tags for recent releases, e.g., '2013e' for Release 2013e.
2742: Releases are tagged starting with 2012e; earlier releases were
2743: done differently, and tags would either not have a simple name or
2744: not exactly match what was released.
2745:
2746: 'make set-timestamps' is now simpler and a bit more portable.
2747:
2748:
2749: Release 2013e - 2013-09-19 23:50:04 -0700
2750:
1.20 christos 2751: Changes affecting near-future timestamps
1.1 christos 2752:
2753: This year Fiji will start DST on October 27, not October 20.
2754: (Thanks to David Wheeler for the heads-up.) For now, guess that
2755: Fiji will continue to spring forward the Sunday before the fourth
2756: Monday in October.
2757:
2758: Changes affecting current and future time zone abbreviations
2759:
2760: Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian
2761: time zone abbreviations since 1932. (Thanks to George Ziegler,
2762: Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and
2763: Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura,
2764: Asia/Makassar, and Asia/Pontianak.
2765:
1.17 christos 2766: Use ART (UT -03, standard time), rather than WARST (also -03, but
1.1 christos 2767: daylight saving time) for San Luis, Argentina since 2009.
2768:
1.20 christos 2769: Changes affecting Godthåb timestamps after 2037 if version mismatch
1.1 christos 2770:
2771: Allow POSIX-like TZ strings where the transition time's hour can
2772: range from -167 through 167, instead of the POSIX-required 0
2773: through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the
2774: new Fiji rules. This is a more-compact way to represent
1.20 christos 2775: far-future timestamps for America/Godthab, America/Santiago,
1.1 christos 2776: Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem,
2777: Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by
2778: this change. (Derived from a suggestion by Arthur David Olson.)
2779:
2780: Allow POSIX-like TZ strings where daylight saving time is in
2781: effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western
2782: Argentina Summer Time all year. This supports a more-compact way
2783: to represent the 2013d data for America/Argentina/San_Luis.
2784: Because of the change for San Luis noted above this change does not
2785: affect the current data. (Thanks to Andrew Main (Zefram) for
2786: suggestions that improved this change.)
2787:
2788: Where these two TZ changes take effect, there is a minor extension
2789: to the tz file format in that it allows new values for the
2790: embedded TZ-format string, and the tz file format version number
2791: has therefore been increased from 2 to 3 as a precaution.
2792: Version-2-based client code should continue to work as before for
1.20 christos 2793: all timestamps before 2038. Existing version-2-based client code
1.1 christos 2794: (tzcode, GNU/Linux, Solaris) has been tested on version-3-format
1.20 christos 2795: files, and typically works in practice even for timestamps after
1.1 christos 2796: 2037; the only known exception is America/Godthab.
2797:
1.20 christos 2798: Changes affecting timestamps before 1970
1.1 christos 2799:
2800: Pacific/Johnston is now a link to Pacific/Honolulu. This corrects
2801: some errors before 1947.
2802:
1.6 christos 2803: Some zones have been turned into links, when they differ from existing
2804: zones only in older data entries that were likely invented or that
2805: differ only in LMT or transitions from LMT. These changes affect
1.20 christos 2806: only timestamps before 1943. The affected zones are:
1.1 christos 2807: Africa/Juba, America/Anguilla, America/Aruba, America/Dominica,
2808: America/Grenada, America/Guadeloupe, America/Marigot,
2809: America/Montserrat, America/St_Barthelemy, America/St_Kitts,
2810: America/St_Lucia, America/St_Thomas, America/St_Vincent,
2811: America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for
2812: confirming that the old Europe/Vaduz zone was wrong and the new
2813: link is better for WWII-era times.)
2814:
2815: Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects
1.20 christos 2816: America/Cayman, America/Jamaica and America/Grand_Turk timestamps
1.1 christos 2817: from 1890 to 1912.
2818:
2819: Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
1.20 christos 2820: This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks
1.29 ! christos 2821: to Alois Treindl.)
1.1 christos 2822:
2823: Change the date of the circa-1850 Zurich transition from 1849-09-12
2824: to 1853-07-16, overriding Shanks with data from Messerli about
2825: postal and telegraph time in Switzerland.
2826:
2827: Changes affecting time zone abbreviations before 1970
2828:
2829: For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932,
2830: as Jakarta was called Batavia back then.
2831:
2832: Changes affecting API
2833:
2834: The 'zic' command now outputs a dummy transition when far-future
2835: data can't be summarized using a TZ string, and uses a 402-year
2836: window rather than a 400-year window. For the current data, this
2837: affects only the Asia/Tehran file. It does not affect any of the
1.20 christos 2838: timestamps that this file represents, so zdump outputs the same
1.1 christos 2839: information as before. (Thanks to Andrew Main (Zefram).)
2840:
2841: The 'date' command has a new '-r' option, which lets you specify
2842: the integer time to display, a la FreeBSD.
2843:
2844: The 'tzselect' command has two new options '-c' and '-n', which lets you
2845: select a zone based on latitude and longitude.
2846:
2847: The 'zic' command's '-v' option now warns about constructs that
2848: require the new version-3 binary file format. (Thanks to Arthur
2849: David Olson for the suggestion.)
2850:
2851: Support for floating-point time_t has been removed.
2852: It was always dicey, and POSIX no longer requires it.
2853: (Thanks to Eric Blake for suggesting to the POSIX committee to
2854: remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
2855: Heninger, Arthur David Olson, and Alois Treindl, for reporting
2856: bugs and elucidating some of the corners of the old floating-point
2857: implementation.)
2858:
2859: The signatures of 'offtime', 'timeoff', and 'gtime' have been
2860: changed back to the old practice of using 'long' to represent UT
2861: offsets. This had been inadvertently and mistakenly changed to
1.6 christos 2862: 'int_fast32_t'. (Thanks to Christos Zoulas.)
1.1 christos 2863:
2864: The code avoids undefined behavior on integer overflow in some
2865: more places, including gmtime, localtime, mktime and zdump.
2866:
2867: Changes affecting the zdump utility
2868:
2869: zdump now outputs "UT" when referring to Universal Time, not "UTC".
1.20 christos 2870: "UTC" does not make sense for timestamps that predate the introduction
1.1 christos 2871: of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen
2872: for clarifying UT vs UTC.)
2873:
2874: Data changes affecting behavior of tzselect and similar programs
2875:
2876: Country code BQ is now called the more-common name "Caribbean Netherlands"
2877: rather than the more-official "Bonaire, St Eustatius & Saba".
2878:
2879: Remove from zone.tab the names America/Montreal, America/Shiprock,
2880: and Antarctica/South_Pole, as they are equivalent to existing
1.20 christos 2881: same-country-code zones for post-1970 timestamps. The data entries for
1.1 christos 2882: these names are unchanged, so the names continue to work as before.
2883:
2884: Changes affecting code internals
2885:
2886: zic -c now runs way faster on 64-bit hosts when given large numbers.
2887:
2888: zic now uses vfprintf to avoid allocating and freeing some memory.
2889:
2890: tzselect now computes the list of continents from the data,
2891: rather than have it hard-coded.
2892:
2893: Minor changes pacify GCC 4.7.3 and GCC 4.8.1.
2894:
2895: Changes affecting the build procedure
2896:
2897: The 'leapseconds' file is now generated automatically from a
2898: new file 'leap-seconds.list', which is a copy of
1.22 christos 2899: <ftp://ftp.nist.gov/pub/time/leap-seconds.list>
1.1 christos 2900: A new source file 'leapseconds.awk' implements this.
2901: The goal is simplification of the future maintenance of 'leapseconds'.
2902:
2903: When building the 'posix' or 'right' subdirectories, if the
2904: subdirectory would be a copy of the default subdirectory, it is
2905: now made a symbolic link if that is supported. This saves about
2906: 2 MB of file system space.
2907:
2908: The links America/Shiprock and Antarctica/South_Pole have been
2909: moved to the 'backward' file. This affects only nondefault builds
2910: that omit 'backward'.
2911:
2912: Changes affecting version-control only
2913:
2914: .gitignore now ignores 'date'.
2915:
2916: Changes affecting documentation and commentary
2917:
2918: Changes to the 'tzfile' man page
2919:
2920: It now mentions that the binary file format may be extended in
2921: future versions by appending data.
2922:
2923: It now refers to the 'zdump' and 'zic' man pages.
2924:
2925: Changes to the 'zic' man page
2926:
2927: It lists conditions that elicit a warning with '-v'.
2928:
2929: It says that the behavior is unspecified when duplicate names
2930: are given, or if the source of one link is the target of another.
2931:
2932: Its examples are updated to match the latest data.
2933:
2934: The definition of white space has been clarified slightly.
2935: (Thanks to Michael Deckers.)
2936:
2937: Changes to the 'Theory' file
2938:
2939: There is a new section about the accuracy of the tz database,
2940: describing the many ways that errors can creep in, and
1.20 christos 2941: explaining why so many of the pre-1970 timestamps are wrong or
1.1 christos 2942: misleading (thanks to Steve Allen, Lester Caine, and Garrett
2943: Wollman for discussions that contributed to this).
2944:
2945: The 'Theory' file describes LMT better (this follows a
2946: suggestion by Guy Harris).
2947:
2948: It refers to the 2013 edition of POSIX rather than the 2004 edition.
2949:
2950: It's mentioned that excluding 'backward' should not affect the
2951: other data, and it suggests at least one zone.tab name per
2952: inhabited country (thanks to Stephen Colebourne).
2953:
2954: Some longstanding restrictions on names are documented, e.g.,
2955: 'America/New_York' precludes 'America/New_York/Bronx'.
2956:
2957: It gives more reasons for the 1970 cutoff.
2958:
2959: It now mentions which time_t variants are supported, such as
2960: signed integer time_t. (Thanks to Paul Goyette for reporting
2961: typos in an experimental version of this change.)
2962:
2963: (Thanks to Philip Newton for correcting typos in these changes.)
2964:
2965: Documentation and commentary is more careful to distinguish UT in
2966: general from UTC in particular. (Thanks to Steve Allen.)
2967:
2968: Add a better source for the Zurich 1894 transition.
2969: (Thanks to Pierre-Yves Berger.)
2970:
2971: Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.)
2972:
2973:
2974: Release 2013d - 2013-07-05 07:38:01 -0700
2975:
1.20 christos 2976: Changes affecting future timestamps:
1.1 christos 2977:
2978: Morocco's midsummer transitions this year are July 7 and August 10,
2979: not July 9 and August 8. (Thanks to Andrew Paprocki.)
2980:
2981: Israel now falls back on the last Sunday of October.
2982: (Thanks to Ephraim Silverberg.)
2983:
1.20 christos 2984: Changes affecting past timestamps:
1.1 christos 2985:
2986: Specify Jerusalem's location more precisely; this changes the pre-1880
2987: times by 2 s.
2988:
2989: Changing affecting metadata only:
2990:
2991: Fix typos in the entries for country codes BQ and SX.
2992:
2993: Changes affecting code:
2994:
2995: Rework the code to fix a bug with handling Australia/Macquarie on
2996: 32-bit hosts (thanks to Arthur David Olson).
2997:
2998: Port to platforms like NetBSD, where time_t can be wider than long.
2999:
3000: Add support for testing time_t types other than the system's.
3001: Run 'make check_time_t_alternatives' to try this out.
3002: Currently, the tests fail for unsigned time_t;
3003: this should get fixed at some point.
3004:
3005: Changes affecting documentation and commentary:
3006:
3007: Deemphasize the significance of national borders.
3008:
3009: Update the zdump man page.
3010:
3011: Remove obsolete NOID comment (thanks to Denis Excoffier).
3012:
3013: Update several URLs and comments in the web pages.
3014:
3015: Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler).
3016:
3017: Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka).
3018:
3019:
3020: Release 2013c - 2013-04-19 16:17:40 -0700
3021:
1.20 christos 3022: Changes affecting current and future timestamps:
1.1 christos 3023:
3024: Palestine observed DST starting March 29, 2013. (Thanks to
3025: Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST,
3026: with the predicted rules being the last Thursday in March at 24:00
3027: to the first Friday on or after September 21 at 01:00.
3028:
3029: Assume that the recent change to Paraguay's DST rules is permanent,
3030: by moving the end of DST to the 4th Sunday in March every year.
1.5 christos 3031: (Thanks to Carlos Raúl Perasso.)
1.1 christos 3032:
1.20 christos 3033: Changes affecting past timestamps:
1.1 christos 3034:
3035: Fix some historical data for Palestine to agree with that of
3036: timeanddate.com, as follows:
3037:
3038: The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not
3039: 00:00 Apr 1.
3040:
3041: The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not
3042: 02:00.
3043:
3044: The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27.
3045:
3046: The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2.
3047:
3048: The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01.
3049:
3050: The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00.
3051:
3052: Fix times of habitation for Macquarie to agree with the Tasmania
3053: Parks & Wildlife Service history, which indicates that permanent
3054: habitation was 1899-1919 and 1948 on.
3055:
3056: Changing affecting metadata only:
3057:
3058: Macquarie Island is politically part of Australia, not Antarctica.
3059: (Thanks to Tobias Conradi.)
3060:
3061: Sort Macquarie more-consistently with other parts of Australia.
3062: (Thanks to Tim Parenti.)
3063:
3064:
3065: Release 2013b - 2013-03-10 22:33:40 -0700
3066:
1.20 christos 3067: Changes affecting current and future timestamps:
1.1 christos 3068:
3069: Haiti uses US daylight-saving rules this year, and presumably future years.
1.20 christos 3070: This changes timestamps starting today. (Thanks to Steffen Thorsen.)
1.1 christos 3071:
3072: Paraguay will end DST on March 24 this year.
3073: (Thanks to Steffen Thorsen.) For now, assume it's just this year.
3074:
3075: Morocco does not observe DST during Ramadan;
3076: try to predict Ramadan in Morocco as best we can.
3077: (Thanks to Erik Homoet for the heads-up.)
3078:
3079: Changes affecting commentary:
3080:
3081: Update URLs in tz-link page. Add URLs for webOS, BB10, iOS.
3082: Update URL for Solaris. Mention Internet RFC 6557.
3083: Update Internet RFCs 2445->5545, 2822->5322.
3084: Switch from FTP to HTTP for Internet RFCs.
3085:
3086:
3087: Release 2013a - 2013-02-27 09:20:35 -0800
3088:
3089: Change affecting binary data format:
3090:
3091: The zone offset at the end of version-2-format zone files is now
1.5 christos 3092: allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.)
1.1 christos 3093:
1.20 christos 3094: Changes affecting current and future timestamps:
1.1 christos 3095:
3096: Chile's 2013 rules, and we guess rules for 2014 and later, will be
3097: the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC.
3098: (Thanks to Steffen Thorsen and Robert Elz.)
3099:
3100: New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen.
3101: (Thanks to Tobias Conradi and Arthur David Olson.)
3102:
1.20 christos 3103: Many changes affect historical timestamps before 1940.
1.1 christos 3104: These were deduced from: Milne J. Civil time. Geogr J. 1899
1.22 christos 3105: Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>.
1.1 christos 3106:
3107: Changes affecting the code:
3108:
3109: Fix zic bug that mishandled Egypt's 2010 changes (this also affected
3110: the data). (Thanks to Arthur David Olson.)
3111:
3112: Fix localtime bug when time_t is unsigned and data files were generated
3113: by a signed time_t system. (Thanks to Doug Bailey for reporting and
3114: to Arthur David Olson for fixing.)
3115:
3116: Allow the email address for bug reports to be set by the packager.
3117: The default is tz@iana.org, as before. (Thanks to Joseph S. Myers.)
3118:
3119: Update HTML checking to be compatible with Ubuntu 12.10.
3120:
3121: Check that files are a safe subset of ASCII. At some point we may
3122: relax this requirement to a safe subset of UTF-8. Without the
3123: check, some non-UTF-8 encodings were leaking into the distribution.
3124:
3125: Commentary changes:
3126:
3127: Restore a comment about copyright notices that was inadvertently deleted.
3128: (Thanks to Arthur David Olson.)
3129:
3130: Improve the commentary about which districts observe what times
1.29 ! christos 3131: in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson.)
1.1 christos 3132:
3133: Add web page links to tz.js.
3134:
3135: Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.)
3136:
3137:
3138: Release 2012j - 2012-11-12 18:34:49 -0800
3139:
3140: Libya moved to CET this weekend, but with DST planned next year.
3141: (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.)
3142:
3143: Signatures now have the extension .asc, not .sign, as that's more
3144: standard. (Thanks to Phil Pennock.)
3145:
3146: The output of 'zdump --version', and of 'zic --version', now
3147: uses a format that is more typical for --version.
3148: (Thanks to Joseph S. Myers.)
3149:
3150: The output of 'tzselect --help', 'zdump --help', and 'zic --help'
3151: now uses tz@iana.org rather than the old elsie address.
3152:
3153: zic -v now complains about abbreviations that are less than 3
3154: or more than 6 characters, as per Posix. Formerly, it checked
3155: for abbreviations that were more than 3.
3156:
3157: 'make public' no longer puts its temporary directory under /tmp,
3158: and uses the just-built zic rather than the system zic.
3159:
3160: Various fixes to documentation and commentary.
3161:
3162:
3163: Release 2012i - 2012-11-03 12:57:09 -0700
3164:
3165: Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.)
3166:
3167: Linker flags can now be specified via LDFLAGS.
3168: AWK now defaults to 'awk', not 'nawk'.
3169: The shell in tzselect now defaults to /bin/bash, but this can
3170: be overridden by specifying KSHELL.
1.6 christos 3171: The main web page now mentions the unofficial GitHub repository.
1.1 christos 3172: (Thanks to Mike Frysinger.)
3173:
3174: Tarball signatures can now be built by running 'make signatures'.
3175: There are also new makefile rules 'tarballs', 'check_public', and
3176: separate makefile rules for each tarball and signature file.
3177: A few makefile rules are now more portable to strict POSIX.
3178:
3179: The main web page now lists the canonical IANA URL.
3180:
3181:
3182: Release 2012h - 2012-10-26 22:49:10 -0700
3183:
3184: Bahia no longer has DST. (Thanks to Kelley Cook.)
3185:
3186: Tocantins has DST. (Thanks to Rodrigo Severo.)
3187:
3188: Israel has new DST rules next year. (Thanks to Ephraim Silverberg.)
3189:
3190: Jordan stays on DST this winter. (Thanks to Steffen Thorsen.)
3191:
3192: Web page updates.
3193:
3194: More C modernization, except that at Arthur David Olson's suggestion
3195: the instances of 'register' were kept.
3196:
3197:
3198: Release 2012g - 2012-10-17 20:59:45 -0700
3199:
3200: Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.)
3201:
3202: Palestine fall 2012. (Thanks to Steffen Thorsen.)
3203:
3204: Assume C89.
3205:
3206: To attack the version-number problem, this release ships the file
3207: 'Makefile' (which contains the release number) in both the tzcode and
3208: the tzdata tarballs. The two Makefiles are identical, and should be
3209: identical in any matching pair of tarballs, so it shouldn't matter
3210: which order you extract the tarballs. Perhaps we can come up with a
3211: better version-number scheme at some point; this scheme does have the
3212: virtue of not adding more files.
3213:
3214:
3215: Release 2012f - 2012-09-12 23:17:03 -0700
3216:
3217: * australasia (Pacific/Fiji): Fiji DST is October 21 through January
3218: 20 this year. (Thanks to Steffen Thorsen.)
3219:
3220:
3221: Release 2012e - 2012-08-02 20:44:55 -0700
3222:
1.17 christos 3223: * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14.
1.1 christos 3224: (Thanks to Steffen Thorsen.)
3225:
3226: * Use a single version number for both code and data.
3227:
3228: * .gitignore: New file.
3229:
3230: * Remove trailing white space.
3231:
3232:
3233: Release code2012c-data2012d - 2012-07-19 16:35:33 -0700
3234:
1.20 christos 3235: Changes for Morocco's timestamps, which take effect in a couple of
1.1 christos 3236: hours, along with infrastructure changes to accommodate how the tz
3237: code and data are released on IANA.
3238:
3239:
3240: Release data2012c - 2012-03-27 12:17:25 -0400
3241:
3242: africa
3243: Summer time changes for Morocco (to start late April 2012)
3244:
3245: asia
3246: Changes for 2012 for Gaza & the West Bank (Hebron) and Syria
3247:
3248: northamerica
3249: Haiti following US/Canada rules for 2012 (and we're assuming,
3250: for now anyway, for the future).
3251:
3252:
3253: Release 2012b - 2012-03-02 12:29:15 +0700
3254:
3255: There is just one change to tzcode2012b (compared with 2012a):
3256: the Makefile that was accidentally included with 2012a has been
3257: replaced with the version that should have been there, which is
3258: identical with the previous version (from tzcode2011i).
3259:
3260: There are just two changes in tzdata2012b compared with 2012a.
3261:
3262: Most significantly, summer time in Cuba has been delayed 3 weeks
3263: (now starts April 1 rather than March 11). Since Mar 11 (the old start
3264: date, as listed in 2012a) is just a little over a week away, this
3265: change is urgent.
3266:
3267: Less importantly, an excess tab in one of the changes in zone.tab
3268: in 2012a has been removed.
3269:
3270:
3271: Release 2012a - 2012-03-01 18:28:10 +0700
3272:
3273: The changes in tzcode2012a (compared to the previous version, 2011i)
3274: are entirely to the README and tz-art.htm and tz-link.htm files, if
3275: none of those concern you, you can ignore the code update. The changes
3276: reflect the changed addresses for the mailing list and the code and
3277: data distribution points & methods (and a link to DateTime::TimeZone::Tzfile
3278: has been added to tz-link.htm).
3279:
3280: In tzdata2012a (compared to the previous release, which was 2011n)
3281: the major changes are:
3282: Chile 2011/2012 and 2012/2013 summer time date adjustments.
3283: Falkland Islands onto permanent summer time (we're assuming for the
3284: foreseeable future, though 2012 is all we're fairly certain of.)
3285: Armenia has abolished Summer Time.
3286: Tokelau jumped the International Date Line back last December
3287: (just the same as their near neighbour, Samoa).
3288: America/Creston is a new zone for a small area of British Columbia
3289: There will be a leapsecond 2012-06-30 23:59:60 UTC.
3290:
3291: Other minor changes are:
3292: Corrections to 1918 Canadian summer time end dates.
1.6 christos 3293: Updated URL for UK time zone history (in comments)
1.1 christos 3294: A few typos in Le Corre's list of free French place names (comments)
3295:
3296:
3297: Release data2011n - 2011-10-30 14:57:54 +0700
3298:
3299: There are three changes of note - most urgently, Cuba (America/Havana)
3300: has extended summer time by two weeks, now to end on Nov 13, rather than
3301: the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic
3302: (Europe/Tiraspol) decided not to split from the rest of Moldova after
3303: all, and consequently that zone has been removed (again) and reinstated
3304: in the "backward" file as a link to Europe/Chisinau. And third, the
3305: end date for Fiji's summer time this summer was moved forward from the
3306: earlier planned Feb 26, to Jan 22.
3307:
3308: Apart from that, Moldova (MD) returns to a single entry in zone.tab
3309: (and the incorrect syntax that was in the 2011m version of that file
3310: is so fixed - it would have been fixed in a different way had this
3311: change not happened - that's the "missing" sccs version id).
3312:
3313:
3314: Release data2011m - 2011-10-24 21:42:16 +0700
3315:
3316: In particular, the typos in comments in the data (2011-11-17 should have
3317: been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that
3318: Tim Parenti noted) have been fixed, and the change for Ukraine has been
3319: made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to
3320: Tim Parenti, and also Denys Gavrysh)
3321:
3322: In addition, I added Europe/Tiraspol to zone.tab.
3323:
3324: This time, all the files have new version numbers... (including the files
3325: otherwise unchanged in 2011m that were changed in 2011l but didn't get new
3326: version numbers there...)
3327:
3328:
1.5 christos 3329: Release data2011l - 2011-10-10 11:15:43 +0700
1.1 christos 3330:
3331: There are just 2 changes that cause different generated tzdata files from
3332: zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil
3333: is included, but commented out. Compared with the diff I sent out last week,
3334: this version also includes attributions for the sources for the changes
3335: (in much the same format as ado used, but the html tags have not been
3336: checked, verified, or used in any way at all, so if there are errors there,
3337: please let me know.)
3338:
3339:
3340: Release data2011k - 2011-09-20 17:54:03 -0400
3341:
3342: [not summarized]
3343:
3344:
3345: Release data2011j - 2011-09-12 09:22:49 -0400
3346:
3347: (contemporary changes for Samoa; past changes for Kenya, Uganda, and
3348: Tanzania); there are also two spelling corrections to comments in
3349: the australasia file (with thanks to Christos Zoulas).
3350:
3351:
3352: Release 2011i - 2011-08-29 05:56:32 -0400
3353:
3354: [not summarized]
3355:
3356:
3357: Release data2011h - 2011-06-15 18:41:48 -0400
3358:
1.5 christos 3359: Russia and Curaçao changes
1.1 christos 3360:
3361:
3362: Release 2011g - 2011-04-25 09:07:22 -0400
3363:
3364: update the rules for Egypt to reflect its abandonment of DST this year
3365:
3366:
3367: Release 2011f - 2011-04-06 17:14:53 -0400
3368:
3369: [not summarized]
3370:
3371:
3372: Release 2011e - 2011-03-31 16:04:38 -0400
3373:
3374: Morocco, Chile, and tz-link changes
3375:
3376:
3377: Release 2011d - 2011-03-14 09:18:01 -0400
3378:
1.20 christos 3379: changes that impact present-day timestamps in Cuba, Samoa, and Turkey
1.1 christos 3380:
3381:
3382: Release 2011c - 2011-03-07 09:30:09 -0500
3383:
1.20 christos 3384: These do affect current timestamps in Chile and Annette Island, Canada.
1.1 christos 3385:
3386:
3387: Release 2011b - 2011-02-07 08:44:50 -0500
3388:
3389: [not summarized]
3390:
3391:
3392: Release 2011a - 2011-01-24 10:30:16 -0500
3393:
3394: [not summarized]
3395:
3396:
3397: Release data2010o - 2010-11-01 09:18:23 -0400
3398:
3399: change to the end of DST in Fiji in 2011
3400:
3401:
3402: Release 2010n - 2010-10-25 08:19:17 -0400
3403:
3404: [not summarized]
3405:
3406:
3407: Release 2010m - 2010-09-27 09:24:48 -0400
3408:
3409: Hong Kong, Vostok, and zic.c changes
3410:
3411:
3412: Release 2010l - 2010-08-16 06:57:25 -0400
3413:
3414: [not summarized]
3415:
3416:
3417: Release 2010k - 2010-07-26 10:42:27 -0400
3418:
3419: [not summarized]
3420:
3421:
3422: Release 2010j - 2010-05-10 09:07:48 -0400
3423:
1.5 christos 3424: changes for Bahía de Banderas and for version naming
1.1 christos 3425:
3426:
3427: Release data2010i - 2010-04-16 18:50:45 -0400
3428:
3429: the end of DST in Morocco on 2010-08-08
3430:
3431:
3432: Release data2010h - 2010-04-05 09:58:56 -0400
3433:
3434: [not summarized]
3435:
3436:
3437: Release data2010g - 2010-03-24 11:14:53 -0400
3438:
3439: [not summarized]
3440:
3441:
3442: Release 2010f - 2010-03-22 09:45:46 -0400
3443:
3444: [not summarized]
3445:
3446:
3447: Release data2010e - 2010-03-08 14:24:27 -0500
3448:
3449: corrects the Dhaka bug found by Danvin Ruangchan
3450:
3451:
3452: Release data2010d - 2010-03-06 07:26:01 -0500
3453:
3454: [not summarized]
3455:
3456:
3457: Release 2010c - 2010-03-01 09:20:58 -0500
3458:
3459: changes including KRE's suggestion for earlier initialization of
3460: "goahead" and "goback" structure elements
3461:
3462:
3463: Release code2010a - 2010-02-16 10:40:04 -0500
3464:
3465: [not summarized]
3466:
3467:
3468: Release data2010b - 2010-01-20 12:37:01 -0500
3469:
3470: Mexico changes
3471:
3472:
3473: Release data2010a - 2010-01-18 08:30:04 -0500
3474:
3475: changes to Dhaka
3476:
3477:
3478: Release data2009u - 2009-12-26 08:32:28 -0500
3479:
3480: changes to DST in Bangladesh
3481:
3482:
3483: Release 2009t - 2009-12-21 13:24:27 -0500
3484:
3485: [not summarized]
3486:
3487:
3488: Release data2009s - 2009-11-14 10:26:32 -0500
3489:
3490: (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change
3491:
3492:
3493: Release 2009r - 2009-11-09 10:10:31 -0500
3494:
3495: "antarctica" and "tz-link.htm" changes
3496:
3497:
3498: Release 2009q - 2009-11-02 09:12:40 -0500
3499:
3500: with two corrections as reported by Eric Muller and Philip Newton
3501:
3502:
3503: Release data2009p - 2009-10-23 15:05:27 -0400
3504:
3505: Argentina (including San Luis) changes (with the correction from
3506: Mariano Absatz)
3507:
3508:
3509: Release data2009o - 2009-10-14 16:49:38 -0400
3510:
3511: Samoa (commentary only), Pakistan, and Bangladesh changes
3512:
3513:
3514: Release data2009n - 2009-09-22 15:13:38 -0400
3515:
3516: added commentary for Argentina and a change to the end of DST in
3517: 2009 in Pakistan
3518:
3519:
3520: Release data2009m - 2009-09-03 10:23:43 -0400
3521:
3522: Samoa and Palestine changes
3523:
3524:
3525: Release data2009l - 2009-08-14 09:13:07 -0400
3526:
1.5 christos 3527: Samoa (comments only) and Egypt
1.1 christos 3528:
3529:
3530: Release 2009k - 2009-07-20 09:46:08 -0400
3531:
3532: [not summarized]
3533:
3534:
3535: Release data2009j - 2009-06-15 06:43:59 -0400
3536:
3537: Bangladesh change (with a short turnaround since the DST change is
3538: impending)
3539:
3540:
3541: Release 2009i - 2009-06-08 09:21:22 -0400
3542:
3543: updating for DST in Bangladesh this year
3544:
3545:
3546: Release 2009h - 2009-05-26 09:19:14 -0400
3547:
3548: [not summarized]
3549:
3550:
3551: Release data2009g - 2009-04-20 16:34:07 -0400
3552:
3553: Cairo
3554:
3555:
3556: Release data2009f - 2009-04-10 11:00:52 -0400
3557:
3558: correct DST in Pakistan
3559:
3560:
3561: Release 2009e - 2009-04-06 09:08:11 -0400
3562:
3563: [not summarized]
3564:
3565:
3566: Release 2009d - 2009-03-23 09:38:12 -0400
3567:
3568: Morocco, Tunisia, Argentina, and American Astronomical Society changes
3569:
3570:
3571: Release data2009c - 2009-03-16 09:47:51 -0400
3572:
3573: change to the start of Cuban DST
3574:
3575:
3576: Release 2009b - 2009-02-09 11:15:22 -0500
3577:
3578: [not summarized]
3579:
3580:
3581: Release 2009a - 2009-01-21 10:09:39 -0500
3582:
3583: [not summarized]
3584:
3585:
3586: Release data2008i - 2008-10-21 12:10:25 -0400
3587:
3588: southamerica and zone.tab files, with Argentina DST rule changes and
3589: United States zone reordering and recommenting
3590:
3591:
3592: Release 2008h - 2008-10-13 07:33:56 -0400
3593:
3594: [not summarized]
3595:
3596:
3597: Release 2008g - 2008-10-06 09:03:18 -0400
3598:
3599: Fix a broken HTML anchor and update Brazil's DST transitions;
3600: there's also a slight reordering of information in tz-art.htm.
3601:
3602:
3603: Release data2008f - 2008-09-09 22:33:26 -0400
3604:
3605: [not summarized]
3606:
3607:
3608: Release 2008e - 2008-07-28 14:11:17 -0400
3609:
1.5 christos 3610: changes by Arthur David Olson and Jesper Nørgaard Welen
1.1 christos 3611:
3612:
3613: Release data2008d - 2008-07-07 09:51:38 -0400
3614:
3615: changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo
3616:
3617:
3618: Release data2008c - 2008-05-19 17:48:03 -0400
3619:
3620: Pakistan, Morocco, and Mongolia
3621:
3622:
3623: Release data2008b - 2008-03-24 08:30:59 -0400
3624:
3625: including renaming Asia/Calcutta to Asia/Kolkata, with a backward
3626: link provided
3627:
3628:
3629: Release 2008a - 2008-03-08 05:42:16 -0500
3630:
3631: [not summarized]
3632:
3633:
3634: Release 2007k - 2007-12-31 10:25:22 -0500
3635:
3636: most importantly, changes to the "southamerica" file based on
3637: Argentina's readoption of daylight saving time
3638:
3639:
3640: Release 2007j - 2007-12-03 09:51:01 -0500
3641:
3642: 1. eliminate the "P" (parameter) macro;
3643:
3644: 2. the "noncontroversial" changes circulated on the time zone
3645: mailing list (less the changes to "logwtmp.c");
3646:
3647: 3. eliminate "too many transition" errors when "min" is used in time
3648: zone rules;
3649:
3650: 4. changes by Paul Eggert (including updated information for Venezuela).
3651:
3652:
3653: Release data2007i - 2007-10-30 10:28:11 -0400
3654:
3655: changes for Cuba and Syria
3656:
3657:
3658: Release 2007h - 2007-10-01 10:05:51 -0400
3659:
3660: changes by Paul Eggert, as well as an updated link to the ICU
3661: project in tz-link.htm
3662:
3663:
3664: Release 2007g - 2007-08-20 10:47:59 -0400
3665:
3666: changes by Paul Eggert
3667:
3668: The "leapseconds" file has been updated to incorporate the most
3669: recent International Earth Rotation and Reference Systems Service
3670: (IERS) bulletin.
3671:
3672: There's an addition to tz-art.htm regarding the television show "Medium".
3673:
3674:
3675: Release 2007f - 2007-05-07 10:46:46 -0400
3676:
3677: changes by Paul Eggert (including Haiti, Turks and Caicos, and New
3678: Zealand)
3679:
3680: changes to zic.c to allow hour values greater than 24 (along with
3681: Paul's improved time value overflow checking)
3682:
3683:
3684: Release 2007e - 2007-04-02 10:11:52 -0400
3685:
3686: Syria and Honduras changes by Paul Eggert
3687:
3688: zic.c variable renaming changes by Arthur David Olson
3689:
3690:
3691: Release 2007d - 2007-03-20 08:48:30 -0400
3692:
3693: changes by Paul Eggert
3694:
3695: the elimination of white space at the ends of lines
3696:
3697:
3698: Release 2007c - 2007-02-26 09:09:37 -0500
3699:
3700: changes by Paul Eggert
3701:
3702:
3703: Release 2007b - 2007-02-12 09:34:20 -0500
3704:
3705: Paul Eggert's proposed change to the quotation handling logic in zic.c.
3706:
3707: changes to the commentary in "leapseconds" reflecting the IERS
3708: announcement that there is to be no positive leap second at the end
3709: of June 2007.
3710:
3711:
3712: Release 2007a - 2007-01-08 12:28:29 -0500
3713:
3714: changes by Paul Eggert
3715:
3716: Derick Rethan's Asmara change
3717:
3718: Oscar van Vlijmen's Easter Island local mean time change
3719:
3720: symbolic link changes
3721:
3722:
3723: Release 2006p - 2006-11-27 08:54:27 -0500
3724:
3725: changes by Paul Eggert
3726:
3727:
3728: Release 2006o - 2006-11-06 09:18:07 -0500
3729:
3730: changes by Paul Eggert
3731:
3732:
3733: Release 2006n - 2006-10-10 11:32:06 -0400
3734:
3735: changes by Paul Eggert
3736:
3737:
3738: Release 2006m - 2006-10-02 15:32:35 -0400
3739:
3740: changes for Uruguay, Palestine, and Egypt by Paul Eggert
3741:
3742: (minimalist) changes to zic.8 to clarify "until" information
3743:
3744:
3745: Release data2006l - 2006-09-18 12:58:11 -0400
3746:
3747: Paul's best-effort work on this coming weekend's Egypt time change
3748:
3749:
3750: Release 2006k - 2006-08-28 12:19:09 -0400
3751:
3752: changes by Paul Eggert
3753:
3754:
3755: Release 2006j - 2006-08-21 09:56:32 -0400
3756:
3757: changes by Paul Eggert
3758:
3759:
3760: Release code2006i - 2006-08-07 12:30:55 -0400
3761:
3762: localtime.c fixes
3763:
3764: Ken Pizzini's conversion script
3765:
3766:
3767: Release code2006h - 2006-07-24 09:19:37 -0400
3768:
3769: adds public domain notices to four files
3770:
3771: includes a fix for transition times being off by a second
3772:
3773: adds a new recording to the "arts" file (information courtesy Colin Bowern)
3774:
3775:
3776: Release 2006g - 2006-05-08 17:18:09 -0400
3777:
3778: northamerica changes by Paul Eggert
3779:
3780:
3781: Release 2006f - 2006-05-01 11:46:00 -0400
3782:
3783: a missing version number problem is fixed (with thanks to Bradley
3784: White for catching the problem)
3785:
3786:
3787: Release 2006d - 2006-04-17 14:33:43 -0400
3788:
3789: changes by Paul Eggert
3790:
3791: added new items to tz-arts.htm that were found by Paul
3792:
3793:
3794: Release 2006c - 2006-04-03 10:09:32 -0400
3795:
3796: two sets of data changes by Paul Eggert
3797:
3798: a fencepost error fix in zic.c
3799:
3800: changes to zic.c and the "europe" file to minimize differences
3801: between output produced by the old 32-bit zic and the new 64-bit
3802: version
3803:
3804:
3805: Release 2006b - 2006-02-20 10:08:18 -0500
3806: [tz32code2006b + tz64code2006b + tzdata2006b]
3807:
3808: 64-bit code
3809:
3810: All SCCS IDs were bumped to "8.1" for this release.
3811:
3812:
3813: Release 2006a - 2006-01-30 08:59:31 -0500
3814:
3815: changes by Paul Eggert (in particular, Indiana time zone moves)
3816:
3817: an addition to the zic manual page to describe how special-case
3818: transitions are handled
3819:
3820:
3821: Release 2005r - 2005-12-27 09:27:13 -0500
3822:
3823: Canadian changes by Paul Eggert
3824:
3825: They also add "<pre>" directives to time zone data files and reflect
3826: changes to warning message logic in "zdump.c" (but with calls to
3827: "gettext" kept unbundled at the suggestion of Ken Pizzini).
3828:
3829:
3830: Release 2005q - 2005-12-13 09:17:09 -0500
3831:
3832: Nothing earth-shaking here:
3833: 1. Electronic mail addresses have been removed.
3834: 2. Casts of the return value of exit have been removed.
3835: 3. Casts of the argument of is.* macros have been added.
3836: 4. Indentation in one section of zic.c has been fixed.
3837: 5. References to dead URLs in the data files have been dealt with.
3838:
3839:
3840: Release 2005p - 2005-12-05 10:30:53 -0500
3841:
3842: "systemv", "tz-link.htm", and "zdump.c" changes
3843: (less the casts of arguments to the is* macros)
3844:
3845:
3846: Release 2005o - 2005-11-28 10:55:26 -0500
3847:
3848: Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert
3849:
3850: zdump.c lint fixes by Arthur David Olson
3851:
3852:
3853: Release 2005n - 2005-10-03 09:44:09 -0400
3854:
1.5 christos 3855: changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan
1.1 christos 3856: et al. changes)
3857:
3858:
3859: Release 2005m - 2005-08-29 12:15:40 -0400
3860:
3861: changes by Paul Eggert (with a small tweak to the tz-art change)
3862:
3863: a declaration of an unused variable has been removed from zdump.c
3864:
3865:
3866: Release 2005l - 2005-08-22 12:06:39 -0400
3867:
3868: changes by Paul Eggert
3869:
3870: overflow/underflow checks by Arthur David Olson, minus changes to
3871: the "Theory" file about the pending addition of 64-bit data (I grow
3872: less confident of the changes being accepted with each passing day,
3873: and the changes no longer increase the data files nine-fold--there's
3874: less than a doubling in size by my local Sun's reckoning)
3875:
3876:
3877: Release 2005k - 2005-07-14 14:14:24 -0400
3878:
3879: The "leapseconds" file has been edited to reflect the recently
3880: announced leap second at the end of 2005.
3881:
3882: I've also deleted electronic mail addresses from the files as an
3883: anti-spam measure.
3884:
3885:
3886: Release 2005j - 2005-06-13 14:34:13 -0400
3887:
3888: These reflect changes to limit the length of time zone abbreviations
3889: and the characters used in those abbreviations.
3890:
1.25 christos 3891: There are also changes to handle POSIX-style "quoted" timezone
1.1 christos 3892: environment variables.
3893:
3894: The changes were circulated on the time zone mailing list; the only
3895: change since then was the removal of a couple of minimum-length of
3896: abbreviation checks.
3897:
3898:
3899: Release data2005i - 2005-04-21 15:04:16 -0400
3900:
3901: changes (most importantly to Nicaragua and Haiti) by Paul Eggert
3902:
3903:
3904: Release 2005h - 2005-04-04 11:24:47 -0400
3905:
3906: changes by Paul Eggert
3907:
3908: minor changes to Makefile and zdump.c to produce more useful output
3909: when doing a "make typecheck"
3910:
3911:
3912: Release 2005g - 2005-03-14 10:11:21 -0500
3913:
3914: changes by Paul Eggert (a change to current DST rules in Uruguay and
3915: an update to a link to time zone software)
3916:
3917:
3918: Release 2005f - 2005-03-01 08:45:32 -0500
3919:
3920: data and documentation changes by Paul Eggert
3921:
3922:
3923: Release 2005e - 2005-02-10 15:59:44 -0500
3924:
3925: [not summarized]
3926:
3927:
3928: Release code2005d - 2005-01-31 09:21:47 -0500
3929:
3930: make zic complain about links to links if the -v flag is used
3931:
3932: have "make public" do more code checking
3933:
3934: add an include to "localtime.c" for the benefit of gcc systems
3935:
3936:
3937: Release 2005c - 2005-01-17 18:36:29 -0500
3938:
3939: get better results when mktime runs on a system where time_t is double
3940:
3941: changes to the data files (most importantly to Paraguay)
3942:
3943:
3944: Release 2005b - 2005-01-10 09:19:54 -0500
3945:
3946: Get localtime and gmtime working on systems with exotic time_t types.
3947:
3948: Update the leap second commentary in the "leapseconds" file.
3949:
3950:
3951: Release 2005a - 2005-01-01 13:13:44 -0500
3952:
3953: [not summarized]
3954:
3955:
3956: Release code2004i - 2004-12-14 13:42:58 -0500
3957:
3958: Deal with systems where time_t is unsigned.
3959:
3960:
3961: Release code2004h - 2004-12-07 11:40:18 -0500
3962:
3963: 64-bit-time_t changes
3964:
3965:
3966: Release 2004g - 2004-11-02 09:06:01 -0500
3967:
3968: update to Cuba (taking effect this weekend)
3969:
3970: other changes by Paul Eggert
3971:
3972: correction of the spelling of Oslo
3973:
3974: changed versions of difftime.c and private.h
3975:
3976:
3977: Release code2004f - 2004-10-21 10:25:22 -0400
3978:
3979: Cope with wide-ranging tm_year values.
3980:
3981:
3982: Release 2004e - 2004-10-11 14:47:21 -0400
3983:
3984: Brazil/Argentina/Israel changes by Paul Eggert
3985:
3986: changes to tz-link.htm by Paul
3987:
3988: one small fix to Makefile
3989:
3990:
3991: Release 2004d - 2004-09-22 08:27:29 -0400
3992:
3993: Avoid overflow problems when TM_YEAR_BASE is added to an integer.
3994:
3995:
3996: Release 2004c - 2004-08-11 12:06:26 -0400
3997:
3998: asctime-related changes
3999:
4000: (variants of) some of the documentation changes suggested by Paul Eggert
4001:
4002:
4003: Release 2004b - 2004-07-19 14:33:35 -0400
4004:
1.5 christos 4005: data changes by Paul Eggert - most importantly, updates for Argentina
1.1 christos 4006:
4007:
4008: Release 2004a - 2004-05-27 12:00:47 -0400
4009:
4010: changes by Paul Eggert
4011:
4012: Handle DST transitions that occur at the end of a month in some
4013: years but at the start of the following month in other years.
4014:
4015: Add a copy of the correspondence that's the basis for claims about
4016: DST in the Navajo Nation.
4017:
4018:
4019: Release 2003e - 2003-12-15 09:36:47 -0500
4020:
4021: changes by Arthur David Olson (primarily code changes)
4022:
4023: changes by Paul Eggert (primarily data changes)
4024:
4025: minor changes to "Makefile" and "northamerica" (in the latter case,
4026: optimization of the "Toronto" rules)
4027:
4028:
4029: Release 2003d - 2003-10-06 09:34:44 -0400
4030:
4031: changes by Paul Eggert
4032:
4033:
4034: Release 2003c - 2003-09-16 10:47:05 -0400
4035:
4036: Fix bad returns in zic.c's inleap function.
4037: Thanks to Bradley White for catching the problem!
4038:
4039:
4040: Release 2003b - 2003-09-16 07:13:44 -0400
4041:
4042: Add a "--version" option (and documentation) to the zic and zdump commands.
4043:
4044: changes to overflow/underflow checking in zic
4045:
4046: a localtime typo fix.
4047:
4048: Update the leapseconds and tz-art.htm files.
4049:
4050:
4051: Release 2003a - 2003-03-24 09:30:54 -0500
4052:
4053: changes by Paul Eggert
4054:
4055: a few additions and modifications to the tz-art.htm file
4056:
4057:
4058: Release 2002d - 2002-10-15 13:12:42 -0400
4059:
4060: changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab
4061:
4062: There's also a new time zone quote in "tz-art.htm".
4063:
4064:
4065: Release 2002c - 2002-04-04 11:55:20 -0500
4066:
4067: changes by Paul Eggert
4068:
4069: Change zic.c to avoid creating symlinks to files that don't exist.
4070:
4071:
4072: Release 2002b - 2002-01-28 12:56:03 -0500
4073:
4074: [These change notes are for Release 2002a, which was corrupted.
4075: 2002b was a corrected version of 2002a.]
4076:
4077: changes by Paul Eggert
4078:
4079: Update the "leapseconds" file to note that there'll be no leap
4080: second at the end of June, 2002.
4081:
4082: Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone.
4083:
4084: Change to "difftime.c" to avoid sizeof problems.
4085:
4086:
4087: Release 2001d - 2001-10-09 13:31:32 -0400
4088:
4089: changes by Paul Eggert
4090:
4091:
4092: Release 2001c - 2001-06-05 13:59:55 -0400
4093:
4094: changes by Paul Eggert and Andrew Brown
4095:
4096:
4097: Release 2001b - 2001-04-05 16:44:38 -0400
4098:
4099: changes by Paul Eggert (modulo jnorgard's typo fix)
4100:
1.5 christos 4101: tz-art.htm has been HTMLified.
1.1 christos 4102:
4103:
4104: Release 2001a - 2001-03-13 12:57:44 -0500
4105:
4106: changes by Paul Eggert
4107:
4108: An addition to the "leapseconds" file: comments with the text of the
4109: latest IERS leap second notice.
4110:
4111: Trailing white space has been removed from data file lines, and
4112: repeated spaces in "Rule Jordan" lines in the "asia" file have been
4113: converted to tabs.
4114:
4115:
4116: Release 2000h - 2000-12-14 15:33:38 -0500
4117:
4118: changes by Paul Eggert
4119:
4120: one typo fix in the "art" file
4121:
1.5 christos 4122: With providence, this is the last update of the millennium.
1.1 christos 4123:
4124:
4125: Release 2000g - 2000-10-10 11:35:22 -0400
4126:
4127: changes by Paul Eggert
4128:
4129: correction of John Mackin's name submitted by Robert Elz
4130:
4131: Garry Shandling's Daylight Saving Time joke (!?!) from the recent
4132: Emmy Awards broadcast.
4133:
4134:
4135: Release 2000f - 2000-08-10 09:31:58 -0400
4136:
4137: changes by Paul Eggert
4138:
4139: Added information in "tz-art.htm" on a Seinfeld reference to DST.
4140:
4141: Error checking and messages in the "yearistype" script have been
4142: improved.
4143:
4144:
4145: Release 2000e - 2000-07-31 09:27:54 -0400
4146:
4147: data changes by Paul Eggert
4148:
4149: a change to the default value of the defined constant HAVE_STRERROR
4150:
4151: the addition of a Dave Barry quote on DST to the tz-arts file
4152:
4153:
4154: Release 2000d - 2000-04-20 15:43:04 -0400
4155:
4156: changes to the documentation and code of strftime for C99 conformance
4157:
4158: a bug fix for date.c
4159:
4160: These are based on (though modified from) changes by Paul Eggert.
4161:
4162:
4163: Release 2000c - 2000-03-04 10:31:43 -0500
4164:
4165: changes by Paul Eggert
4166:
4167:
4168: Release 2000b - 2000-02-21 12:16:29 -0500
4169:
4170: changes by Paul Eggert and Joseph Myers
4171:
4172: modest tweaks to the tz-art.htm and tz-link.htm files
4173:
4174:
4175: Release 2000a - 2000-01-18 09:21:26 -0500
4176:
4177: changes by Paul Eggert
4178:
4179: The two hypertext documents have also been renamed.
4180:
4181:
4182: Release code1999i-data1999j - 1999-11-15 18:43:22 -0500
4183:
4184: Paul Eggert's changes
4185:
4186: additions to the "zic" manual page and the "Arts.htm" file
4187:
4188:
4189: Release code1999h-data1999i - 1999-11-08 14:55:21 -0500
4190:
4191: [not summarized]
4192:
4193:
4194: Release data1999h - 1999-10-07 03:50:29 -0400
4195:
4196: changes by Paul Eggert to "europe" (most importantly, fixing
4197: Lithuania and Estonia)
4198:
4199:
4200: Release 1999g - 1999-09-28 11:06:18 -0400
4201:
4202: data changes by Paul Eggert (most importantly, the change for
4203: Lebanon that buys correctness for this coming Sunday)
4204:
4205: The "code" file contains changes to "Makefile" and "checktab.awk" to
4206: allow better checking of time zone files before they are published.
4207:
4208:
4209: Release 1999f - 1999-09-23 09:48:14 -0400
4210:
4211: changes by Arthur David Olson and Paul Eggert
4212:
4213:
4214: Release 1999e - 1999-08-17 15:20:54 -0400
4215:
4216: changes circulated by Paul Eggert, although the change to handling
1.25 christos 4217: of DST-specifying timezone names has been commented out for now
1.1 christos 4218: (search for "XXX" in "localtime.c" for details). These files also
4219: do not make any changes to the start of DST in Brazil.
4220:
4221: In addition to Paul's changes, there are updates to "Arts.htm" and
4222: cleanups of URLs.
4223:
4224:
4225: Release 1999d - 1999-03-30 11:31:07 -0500
4226:
4227: changes by Paul Eggert
4228:
4229: The Makefile's "make public" rule has also been changed to do a test
4230: compile of each individual time zone data file (which should help
4231: avoid problems such as the one we had with Nicosia).
4232:
4233:
4234: Release 1999c - 1999-03-25 09:47:47 -0500
4235:
4236: changes by Paul Eggert, most importantly the change for Chile.
4237:
4238:
4239: Release 1999b - 1999-02-01 17:51:44 -0500
4240:
4241: changes by Paul Eggert
4242:
4243: code changes (suggested by Mani Varadarajan, mani at be.com) for
4244: correct handling of symbolic links when building using a relative directory
4245:
4246: code changes to generate correct messages for failed links
4247:
4248: updates to the URLs in Arts.htm
4249:
4250:
4251: Release 1999a - 1999-01-19 16:20:29 -0500
4252:
4253: error message internationalizations and corrections in zic.c and
4254: zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz,
4255: to whom thanks!)
4256:
4257:
4258: Release code1998h-data1998i - 1998-10-01 09:56:10 -0400
4259:
4260: changes for Brazil, Chile, and Germany
4261:
4262: support for use of "24:00" in the input files for the time zone compiler
4263:
4264:
4265: Release code1998g-data1998h - 1998-09-24 10:50:28 -0400
4266:
4267: changes by Paul Eggert
4268:
4269: correction to a define in the "private.h" file
4270:
4271:
4272: Release data1998g - 1998-08-11 03:28:35 -0000
4273: [tzdata1998g.tar.gz is missing!]
4274:
4275: Lithuanian change provided by mgedmin at pub.osf.it
4276:
4277: Move creation of the GMT link with Etc/GMT to "etcetera" (from
4278: "backward") to ensure that the GMT file is created even where folks
4279: don't want the "backward" links (as suggested by Paul Eggert).
4280:
4281:
4282: Release data1998f - 1998-07-20 13:50:00 -0000
4283: [tzdata1998f.tar.gz is missing!]
4284:
4285: Update the "leapseconds" file to include the newly-announced
4286: insertion at the end of 1998.
4287:
4288:
4289: Release code1998f - 1998-06-01 10:18:31 -0400
4290:
4291: addition to localtime.c by Guy Harris
4292:
4293:
4294: Release 1998e - 1998-05-28 09:56:26 -0400
4295:
4296: The Makefile is changed to produce zoneinfo-posix rather than
4297: zoneinfo/posix, and to produce zoneinfo-leaps rather than
4298: zoneinfo/right.
4299:
4300: data changes by Paul Eggert
4301:
4302: changes from Guy Harris to provide asctime_r and ctime_r
4303:
4304: A usno1998 file (substantially identical to usno1997) has been added.
4305:
4306:
4307: Release 1998d - 1998-05-14 11:58:34 -0400
4308:
4309: changes to comments (in particular, elimination of references to CIA maps).
4310: "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places
4311: where changes occur.
4312:
4313:
4314: Release 1998c - 1998-02-28 12:32:26 -0500
4315:
4316: changes by Paul Eggert (save the "French correction," on which I'll
4317: wait for the dust to settle)
4318:
4319: symlink changes
4320:
4321: changes and additions to Arts.htm
4322:
4323:
4324: Release 1998b - 1998-01-17 14:31:51 -0500
4325:
4326: URL cleanups and additions
4327:
4328:
4329: Release 1998a - 1998-01-13 12:37:35 -0500
4330:
4331: changes by Paul Eggert
4332:
4333:
4334: Release code1997i-data1997k - 1997-12-29 09:53:41 -0500
4335:
4336: changes by Paul Eggert, with minor modifications from Arthur David
4337: Olson to make the files more browser friendly
4338:
4339:
4340: Release code1997h-data1997j - 1997-12-18 17:47:35 -0500
4341:
1.25 christos 4342: minor changes to put "TZif" at the start of each timezone information file
1.1 christos 4343:
4344: a rule has also been added to the Makefile so you can
4345: make zones
4346: to just recompile the zone information files (rather than doing a
4347: full "make install" with its other effects).
4348:
4349:
4350: Release data1997i - 1997-10-07 08:45:38 -0400
4351:
4352: changes to Africa by Paul Eggert
4353:
4354:
4355: Release code1997g-data1997h - 1997-09-04 16:56:54 -0400
4356:
4357: corrections for Uruguay (and other locations)
4358:
4359: Arthur David Olson's simple-minded fix allowing mktime to both
4360: correctly handle leap seconds and correctly handle tm_sec values
4361: upon which arithmetic has been performed.
4362:
4363:
4364: Release code1997f-data1997g - 1997-07-19 13:15:02 -0400
4365:
4366: Paul Eggert's updates
4367:
4368: a small change to a function prototype;
4369:
1.5 christos 4370: "Music" has been renamed "Arts.htm", HTMLified, and augmented to
1.1 christos 4371: include information on Around the World in Eighty Days.
4372:
4373:
4374: Release code1997e-data1997f - 1997-05-03 18:52:34 -0400
4375:
4376: fixes to zic's error handling
4377:
4378: changes inspired by the item circulated on Slovenia
4379:
1.5 christos 4380: The description of Web resources has been HTMLified for browsing
1.1 christos 4381: convenience.
4382:
4383: A new piece of tz-related music has been added to the "Music" file.
4384:
4385:
4386: Release code1997d-data1997e - 1997-03-29 12:48:52 -0500
4387:
4388: Paul Eggert's latest suggestions
4389:
4390:
4391: Release code1997c-data1997d - 1997-03-07 20:37:54 -0500
4392:
4393: changes to "zic.c" to correct performance of the "-s" option
4394:
4395: a new file "usno1997"
4396:
4397:
4398: Release data1997c - 1997-03-04 09:58:18 -0500
4399:
4400: changes in Israel
4401:
4402:
4403: Release 1997b - 1997-02-27 18:34:19 -0500
4404:
4405: The data file incorporates the 1997 leap second.
4406:
4407: The code file incorporates Arthur David Olson's take on the
4408: zic/multiprocessor/directory-creation situation.
4409:
4410:
4411: Release 1997a - 1997-01-21 09:11:10 -0500
4412:
4413: Paul Eggert's Antarctica (and other changes)
4414:
4415: Arthur David Olson finessed the "getopt" issue by checking against
4416: both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1
4417: is returned while SunOS 5.5's manual says EOF is returned).
4418:
4419:
4420: Release code1996o-data1996n - 1996-12-27 21:42:05 -0500
4421:
4422: Paul Eggert's latest changes
4423:
4424:
4425: Release code1996n - 1996-12-16 09:42:02 -0500
4426:
4427: link snapping fix from Bruce Evans (via Garrett Wollman)
4428:
4429:
4430: Release data1996m - 1996-11-24 02:37:34 -0000
4431: [tzdata1996m.tar.gz is missing!]
4432:
4433: Paul Eggert's batch of changes
4434:
4435:
4436: Release code1996m-data1996l - 1996-11-05 14:00:12 -0500
4437:
4438: No functional changes here; the files have simply been changed to
4439: make more use of ISO style dates in comments. The names of the above
4440: files now include the year in full.
4441:
4442:
4443: Release code96l - 1996-09-08 17:12:20 -0400
4444:
4445: tzcode96k was missing a couple of pieces.
4446:
4447:
4448: Release 96k - 1996-09-08 16:06:22 -0400
4449:
4450: the latest round of changes from Paul Eggert
4451:
4452: the recent Year 2000 material
4453:
4454:
4455: Release code96j - 1996-07-30 13:18:53 -0400
4456:
4457: Set sp->typecnt as suggested by Timothy Patrick Murphy.
4458:
4459:
4460: Release code96i - 1996-07-27 20:11:35 -0400
4461:
4462: Paul's suggested patch for strftime %V week numbers
4463:
4464:
4465: Release data96i - 1996-07-01 18:13:04 -0400
4466:
4467: "northamerica" and "europe" changes by Paul Eggert
4468:
4469:
4470: Release code96h - 1996-06-05 08:02:21 -0400
4471:
4472: fix for handling transitions specified in Universal Time
4473:
4474: Some "public domain" notices have also been added.
4475:
4476:
4477: Release code96g - 1996-05-16 14:00:26 -0400
4478:
4479: fix for the simultaneous-DST-and-zone-change challenge
4480:
4481:
1.5 christos 4482: Release data96h - 1996-05-09 17:40:51 -0400
1.1 christos 4483:
4484: changes by Paul Eggert
4485:
4486:
4487: Release code96f-data96g - 1996-05-03 03:09:59 -0000
4488: [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!]
4489:
4490: The changes get us some of the way to fixing the problems noted in Paul
4491: Eggert's letter yesterday (in addition to a few others). The approach
4492: has been to make zic a bit smarter about figuring out what time zone
4493: abbreviations apply just after the time specified in the "UNTIL" part
4494: of a zone line. Putting the smarts in zic means avoiding having
4495: transition times show up in both "Zone" lines and "Rule" lines, which
4496: in turn avoids multiple transition time entries in time zone files.
4497: (This also makes the zic input files such as "europe" a bit shorter and
4498: should ease maintenance.)
4499:
4500:
4501: Release data96f - 1996-04-19 19:20:03 -0000
4502: [tzdata96f.tar.gz is missing!]
4503:
4504: The only changes are to the "northamerica" file; the time zone
4505: abbreviation for Denver is corrected to MST (and MDT), and the
4506: comments for Mexico have been updated.
4507:
4508:
4509: Release data96e - 1996-03-19 17:37:26 -0500
4510:
4511: Proposals by Paul Eggert, in particular the Portugal change that
4512: comes into play at the end of this month.
4513:
4514:
4515: Release data96d - 1996-03-18 20:49:39 -0500
4516:
4517: [not summarized]
4518:
4519:
1.5 christos 4520: Release code96e - 1996-02-29 15:43:27 -0000
1.1 christos 4521: [tzcode96e.tar.gz is missing!]
4522:
4523: internationalization changes and the fix to the documentation for strftime
4524:
4525:
4526: Release code96d-data96c - 1996-02-12 11:05:27 -0500
4527:
4528: The "code" file simply updates Bob Kridle's electronic address.
4529:
4530: The "data" file updates rules for Mexico.
4531:
4532:
4533: Release data96b - 1996-01-27 15:44:42 -0500
4534:
4535: Kiribati change
4536:
4537:
1.5 christos 4538: Release code96c - 1996-01-16 16:58:15 -0500
1.1 christos 4539:
4540: leap-year streamlining and binary-search changes
4541:
4542: fix to newctime.3
4543:
4544:
4545: Release code96b - 1996-01-10 20:42:39 -0500
4546:
4547: fixes and enhancements from Paul Eggert, including code that
4548: emulates the behavior of recent versions of the SunOS "date"
4549: command.
4550:
4551:
4552: Release 96a - 1996-01-06 09:08:24 -0500
4553:
4554: Israel updates
4555:
4556: fixes to strftime.c for correct ISO 8601 week number generation,
4557: plus support for two new formats ('G' and 'g') to give ISO 8601 year
4558: numbers (which are not necessarily the same as calendar year numbers)
4559:
4560:
4561: Release code95i-data95m - 1995-12-21 12:46:47 -0500
4562:
4563: The latest revisions from Paul Eggert are included, the usno1995
4564: file has been updated, and a new file ("WWW") covering useful URLs
4565: has been added.
4566:
4567:
4568: Release code95h-data95l - 1995-12-19 18:10:12 -0500
4569:
4570: A simplification of a macro definition, a change to data for Sudan,
4571: and (for last minute shoppers) notes in the "Music" file on the CD
4572: "Old Man Time".
4573:
4574:
4575: Release code95g-data95k - 1995-10-30 10:32:47 -0500
4576:
4577: (slightly reformatted) 8-bit-clean proposed patch
4578:
4579: minor patch: US/Eastern -> America/New_York
4580:
4581: snapshot of the USNO's latest data ("usno1995")
4582:
4583: some other minor cleanups
4584:
4585:
4586: Release code95f-data95j - 1995-10-28 21:01:34 -0000
4587: [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!]
4588:
4589: European cleanups
4590:
4591: support for 64-bit time_t's
4592:
4593: optimization in localtime.c
4594:
4595:
4596: Release code95e - 1995-10-13 13:23:57 -0400
4597:
4598: the mktime change to scan from future to past when trying to find time zone
4599: offsets
4600:
4601:
4602: Release data95i - 1995-09-26 10:43:26 -0400
4603:
1.5 christos 4604: For Canada/Central, guess that the Sun customer's "one week too
4605: early" was just a approximation, and the true error is one month
1.1 christos 4606: too early. This is consistent with the rest of Canada.
4607:
4608:
4609: Release data95h - 1995-09-21 11:26:48 -0400
4610:
4611: latest changes from Paul Eggert
4612:
4613:
4614: Release code95d - 1995-09-14 11:14:45 -0400
4615:
4616: the addition of a "Music" file, which documents four recorded
4617: versions of the tune "Save That Time".
4618:
4619:
4620: Release data95g - 1995-09-01 17:21:36 -0400
4621:
4622: "yearistype" correction
4623:
4624:
4625: Release data95f - 1995-08-28 20:46:56 -0400
4626:
4627: Paul Eggert's change to the australasia file
4628:
4629:
4630: Release data95e - 1995-07-08 18:02:34 -0400
4631:
4632: The only change is a leap second at the end of this year.
4633: Thanks to Bradley White for forwarding news on the leap second.
4634:
4635:
4636: Release data95d - 1995-07-03 13:26:22 -0400
4637:
4638: Paul Eggert's changes
4639:
4640:
4641: Release data95c - 1995-07-02 19:19:28 -0400
4642:
4643: changes to "asia", "backward", "europe", and "southamerica"
4644: (read: northamericacentrics need not apply)
4645:
4646:
4647: Release code95c - 1995-03-13 14:00:46 -0500
4648:
4649: one-line fix for sign extension problems in detzcode
4650:
4651:
4652: Release 95b - 1995-03-04 11:22:38 -0500
4653:
4654: Minor changes in both:
4655:
4656: The "code" file contains a workaround for the lack of "unistd.h" in
4657: Microsoft C++ version 7.
4658:
4659: The "data" file contains a fixed "Link" for America/Shiprock.
4660:
4661:
4662: Release 94h - 1994-12-10 12:51:14 -0500
4663:
4664: The files:
4665:
4666: * incorporate the changes to "zdump" and "date" to make changes to
4667: the "TZ" environment variable permanent;
4668:
4669: * incorporate the table changes by Paul Eggert;
4670:
4671: * include (and document) support for universal time specifications in
1.5 christos 4672: data files - but do not (yet) include use of this feature in the
1.1 christos 4673: data files.
4674:
1.5 christos 4675: Think of this as "TZ Classic" - the software has been set up not to break if
1.6 christos 4676: universal time shows up in its input, and data entries have been
4677: left as is so as not to break existing implementations.
1.1 christos 4678:
4679:
4680: Release data94f - 1994-08-20 12:56:09 -0400
4681:
4682: (with thanks!) the latest data updates from Paul Eggert
4683:
4684:
4685: Release data94e - 1994-06-04 13:13:53 -0400
4686:
4687: [not summarized]
4688:
4689:
4690: Release code94g - 1994-05-05 12:14:07 -0400
4691:
4692: fix missing "optind.c" and a reference to it in the Makefile
4693:
4694:
4695: Release code94f - 1994-05-05 13:00:33 -0000
4696: [tzcode94f.tar.gz is missing!]
4697:
4698: changes to avoid overflow in difftime, as well as changes to cope
4699: with the 52/53 challenge in strftime
4700:
4701:
4702: Release code94e - 1994-03-30 23:32:59 -0500
4703:
4704: change for the benefit of PCTS
4705:
4706:
4707: Release 94d - 1994-02-24 15:42:25 -0500
4708:
4709: Avoid clashes with POSIX semantics for zones such as GMT+4.
4710:
4711: Some other very minor housekeeping is also present.
4712:
4713:
4714: Release code94c - 1994-02-10 08:52:40 -0500
4715:
4716: Fix bug where mkdirs was broken unless you compile with
4717: -fwritable-strings (which is generally losing to do).
4718:
4719:
4720: Release 94b - 1994-02-07 10:04:33 -0500
4721:
4722: work by Paul Eggert who notes:
4723:
4724: I found another book of time zone histories by E W Whitman; it's not
4725: as extensive as Shanks but has a few goodies of its own. I used it
4726: to update the tables. I also fixed some more as a result of
4727: correspondence with Adam David and Peter Ilieve, and move some stray
1.5 christos 4728: links from 'europe' to 'backward'. I corrected some scanning errors
1.1 christos 4729: in usno1989.
4730:
4731: As far as the code goes, I fixed zic to allow years in the range
4732: INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900.
4733: And I cleaned up the zic documentation a little bit.
4734:
4735:
4736: Release data94a - 1994-02-03 08:58:54 -0500
4737:
4738: It simply incorporates the recently announced leap second into the
4739: "leapseconds" file.
4740:
4741:
4742: Release 93g - 1993-11-22 17:28:27 -0500
4743:
4744: Paul Eggert has provided a good deal of historic information (based
4745: on Shanks), and there are some code changes to deal with the buglets
4746: that crawled out in dealing with the new information.
4747:
4748:
4749: Release 93f - 1993-10-15 12:27:46 -0400
4750:
4751: Paul Eggert's changes
4752:
4753:
4754: Release 93e - 1993-09-05 21:21:44 -0400
4755:
1.6 christos 4756: This has updated data for Israel, England, and Kwajalein. There's
1.1 christos 4757: also an update to "zdump" to cope with Kwajalein's 24-hour jump.
4758: Thanks to Paul Eggert and Peter Ilieve for the changes.
4759:
4760:
4761: Release 93d - 1993-06-17 23:34:17 -0400
4762:
4763: new fix and new data on Israel
4764:
4765:
4766: Release 93c - 1993-06-06 19:31:55 -0400
4767:
4768: [not summarized]
4769:
4770:
4771: Release 93b - 1993-02-02 14:53:58 -0500
4772:
4773: updated "leapseconds" file
4774:
4775:
4776: Release 93 - 1993-01-08 07:01:06 -0500
4777:
1.5 christos 4778: At kre's suggestion, the package has been split in two - a code piece
1.1 christos 4779: (which also includes documentation) that's only of use to folks who
4780: want to recompile things and a data piece useful to anyone who can
4781: run "zic".
4782:
4783: The new version has a few changes to the data files, a few
4784: portability changes, and an off-by-one fix (with thanks to
1.5 christos 4785: Tom Karzes at deshaw.com for providing a description and a
1.1 christos 4786: solution).
4787:
4788:
4789: Release 92c - 1992-11-21 17:35:36 -0000
4790: [tz92c.tar.Z is missing!]
4791:
4792: The fallout from the latest round of DST transitions.
4793:
4794: There are changes for Portugal, Saskatchewan, and "Pacific-New";
4795: there's also a change to "zic.c" that makes it portable to more systems.
4796:
4797:
4798: Release 92 - 1992-04-25 18:17:03 -0000
4799: [tz92.tar.Z is missing!]
4800:
4801: By popular demand (well, at any rate, following a request by kre at munnari)
4802:
4803:
4804: The 1989 update of the time zone package featured:
4805:
4806: * POSIXization (including interpretation of POSIX-style TZ environment
4807: variables, provided by Guy Harris),
4808: * ANSIfication (including versions of "mktime" and "difftime"),
4809: * SVIDulation (an "altzone" variable)
4810: * MACHination (the "gtime" function)
4811: * corrections to some time zone data (including corrections to the rules
4812: for Great Britain and New Zealand)
4813: * reference data from the United States Naval Observatory for folks who
4814: want to do additional time zones
4815: * and the 1989 data for Saudi Arabia.
4816:
4817: (Since this code will be treated as "part of the implementation" in some
4818: places and as "part of the application" in others, there's no good way to
4819: name functions, such as timegm, that are not part of the proposed ANSI C
4820: standard; such functions have kept their old, underscore-free names in this
4821: update.)
4822:
4823: And the "dysize" function has disappeared; it was present to allow
4824: compilation of the "date" command on old BSD systems, and a version of "date"
4825: is now provided in the package. The "date" command is not created when you
4826: "make all" since it may lack options provided by the version distributed with
4827: your operating system, or may not interact with the system in the same way
4828: the native version does.
4829:
4830: Since POSIX frowns on correct leap second handling, the default behavior of
4831: the "zic" command (in the absence of a "-L" option) has been changed to omit
4832: leap second information from its output files.
4833:
4834:
4835: -----
4836: Notes
4837:
4838: This file contains copies of the part of each release announcement
4839: that talks about the changes in that release. The text has been
4840: adapted and reformatted for the purposes of this file.
4841:
1.17 christos 4842: Traditionally a release R consists of a pair of tarball files,
1.1 christos 4843: tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g.,
4844: code2010a, data2012c) consist of just one or the other tarball, and a
4845: few (e.g., code2012c-data2012d) have tarballs with mixed version
1.17 christos 4846: numbers. Recent releases also come in an experimental format
4847: consisting of a single tarball tzdb-R.tar.lz with extra data.
1.1 christos 4848:
1.20 christos 4849: Release timestamps are taken from the release's commit (for newer,
1.17 christos 4850: Git-based releases), from the newest file in the tarball (for older
1.1 christos 4851: releases, where this info is available) or from the email announcing
1.25 christos 4852: the release (if all else fails; these are marked with a time zone
4853: abbreviation of -0000 and an "is missing!" comment).
1.1 christos 4854:
4855: Earlier versions of the code and data were not announced on the tz
4856: list and are not summarized here.
4857:
4858: This file is in the public domain.
1.5 christos 4859:
4860: Local Variables:
4861: coding: utf-8
4862: End:
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