Annotation of src/external/public-domain/tz/dist/australasia, Revision 1.1.1.1.4.7
1.1 apb 1: # This file is in the public domain, so clarified as of
2: # 2009-05-17 by Arthur David Olson.
3:
4: # This file also includes Pacific islands.
5:
6: # Notes are at the end of this file
7:
8: ###############################################################################
9:
10: # Australia
11:
12: # Please see the notes below for the controversy about "EST" versus "AEST" etc.
13:
14: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
15: Rule Aus 1917 only - Jan 1 0:01 1:00 D
16: Rule Aus 1917 only - Mar 25 2:00 0 S
17: Rule Aus 1942 only - Jan 1 2:00 1:00 D
18: Rule Aus 1942 only - Mar 29 2:00 0 S
19: Rule Aus 1942 only - Sep 27 2:00 1:00 D
20: Rule Aus 1943 1944 - Mar lastSun 2:00 0 S
21: Rule Aus 1943 only - Oct 3 2:00 1:00 D
22: # Go with Whitman and the Australian National Standards Commission, which
23: # says W Australia didn't use DST in 1943/1944. Ignore Whitman's claim that
24: # 1944/1945 was just like 1943/1944.
25:
26: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
27: # Northern Territory
28: Zone Australia/Darwin 8:43:20 - LMT 1895 Feb
29: 9:00 - ACST 1899 May
30: 9:30 Aus AC%sT
31: # Western Australia
32: #
33: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
34: Rule AW 1974 only - Oct lastSun 2:00s 1:00 D
35: Rule AW 1975 only - Mar Sun>=1 2:00s 0 S
36: Rule AW 1983 only - Oct lastSun 2:00s 1:00 D
37: Rule AW 1984 only - Mar Sun>=1 2:00s 0 S
38: Rule AW 1991 only - Nov 17 2:00s 1:00 D
39: Rule AW 1992 only - Mar Sun>=1 2:00s 0 S
40: Rule AW 2006 only - Dec 3 2:00s 1:00 D
41: Rule AW 2007 2009 - Mar lastSun 2:00s 0 S
42: Rule AW 2007 2008 - Oct lastSun 2:00s 1:00 D
43: Zone Australia/Perth 7:43:24 - LMT 1895 Dec
44: 8:00 Aus AW%sT 1943 Jul
45: 8:00 AW AW%sT
46: Zone Australia/Eucla 8:35:28 - LMT 1895 Dec
1.1.1.1.4.6 snj 47: 8:45 Aus +0845/+0945 1943 Jul
48: 8:45 AW +0845/+0945
1.1 apb 49:
50: # Queensland
51: #
52: # From Alex Livingston (1996-11-01):
53: # I have heard or read more than once that some resort islands off the coast
54: # of Queensland chose to keep observing daylight-saving time even after
55: # Queensland ceased to.
56: #
57: # From Paul Eggert (1996-11-22):
58: # IATA SSIM (1993-02/1994-09) say that the Holiday Islands (Hayman, Lindeman,
59: # Hamilton) observed DST for two years after the rest of Queensland stopped.
60: # Hamilton is the largest, but there is also a Hamilton in Victoria,
61: # so use Lindeman.
62: #
1.1.1.1.4.4 snj 63: # From J William Piggott (2016-02-20):
64: # There is no location named Holiday Islands in Queensland Australia; holiday
65: # islands is a colloquial term used globally. Hayman and Lindeman are at the
66: # north and south extremes of the Whitsunday Islands archipelago, and
67: # Hamilton is in between; it is reasonable to believe that this time zone
68: # applies to all of the Whitsundays.
69: # http://www.australia.gov.au/about-australia/australian-story/austn-islands
70: #
1.1 apb 71: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
72: Rule AQ 1971 only - Oct lastSun 2:00s 1:00 D
73: Rule AQ 1972 only - Feb lastSun 2:00s 0 S
74: Rule AQ 1989 1991 - Oct lastSun 2:00s 1:00 D
75: Rule AQ 1990 1992 - Mar Sun>=1 2:00s 0 S
76: Rule Holiday 1992 1993 - Oct lastSun 2:00s 1:00 D
77: Rule Holiday 1993 1994 - Mar Sun>=1 2:00s 0 S
78: Zone Australia/Brisbane 10:12:08 - LMT 1895
79: 10:00 Aus AE%sT 1971
80: 10:00 AQ AE%sT
81: Zone Australia/Lindeman 9:55:56 - LMT 1895
82: 10:00 Aus AE%sT 1971
83: 10:00 AQ AE%sT 1992 Jul
84: 10:00 Holiday AE%sT
85:
86: # South Australia
87: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
88: Rule AS 1971 1985 - Oct lastSun 2:00s 1:00 D
89: Rule AS 1986 only - Oct 19 2:00s 1:00 D
90: Rule AS 1987 2007 - Oct lastSun 2:00s 1:00 D
91: Rule AS 1972 only - Feb 27 2:00s 0 S
92: Rule AS 1973 1985 - Mar Sun>=1 2:00s 0 S
93: Rule AS 1986 1990 - Mar Sun>=15 2:00s 0 S
94: Rule AS 1991 only - Mar 3 2:00s 0 S
95: Rule AS 1992 only - Mar 22 2:00s 0 S
96: Rule AS 1993 only - Mar 7 2:00s 0 S
97: Rule AS 1994 only - Mar 20 2:00s 0 S
98: Rule AS 1995 2005 - Mar lastSun 2:00s 0 S
99: Rule AS 2006 only - Apr 2 2:00s 0 S
100: Rule AS 2007 only - Mar lastSun 2:00s 0 S
101: Rule AS 2008 max - Apr Sun>=1 2:00s 0 S
102: Rule AS 2008 max - Oct Sun>=1 2:00s 1:00 D
103: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
104: Zone Australia/Adelaide 9:14:20 - LMT 1895 Feb
105: 9:00 - ACST 1899 May
106: 9:30 Aus AC%sT 1971
107: 9:30 AS AC%sT
108:
109: # Tasmania
110: #
111: # From Paul Eggert (2005-08-16):
1.1.1.1.4.1 snj 112: # http://www.bom.gov.au/climate/averages/tables/dst_times.shtml
1.1 apb 113: # says King Island didn't observe DST from WWII until late 1971.
114: #
115: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
116: Rule AT 1967 only - Oct Sun>=1 2:00s 1:00 D
117: Rule AT 1968 only - Mar lastSun 2:00s 0 S
118: Rule AT 1968 1985 - Oct lastSun 2:00s 1:00 D
119: Rule AT 1969 1971 - Mar Sun>=8 2:00s 0 S
120: Rule AT 1972 only - Feb lastSun 2:00s 0 S
121: Rule AT 1973 1981 - Mar Sun>=1 2:00s 0 S
122: Rule AT 1982 1983 - Mar lastSun 2:00s 0 S
123: Rule AT 1984 1986 - Mar Sun>=1 2:00s 0 S
124: Rule AT 1986 only - Oct Sun>=15 2:00s 1:00 D
125: Rule AT 1987 1990 - Mar Sun>=15 2:00s 0 S
126: Rule AT 1987 only - Oct Sun>=22 2:00s 1:00 D
127: Rule AT 1988 1990 - Oct lastSun 2:00s 1:00 D
128: Rule AT 1991 1999 - Oct Sun>=1 2:00s 1:00 D
129: Rule AT 1991 2005 - Mar lastSun 2:00s 0 S
130: Rule AT 2000 only - Aug lastSun 2:00s 1:00 D
131: Rule AT 2001 max - Oct Sun>=1 2:00s 1:00 D
132: Rule AT 2006 only - Apr Sun>=1 2:00s 0 S
133: Rule AT 2007 only - Mar lastSun 2:00s 0 S
134: Rule AT 2008 max - Apr Sun>=1 2:00s 0 S
135: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
136: Zone Australia/Hobart 9:49:16 - LMT 1895 Sep
1.1.1.1.4.1 snj 137: 10:00 - AEST 1916 Oct 1 2:00
1.1 apb 138: 10:00 1:00 AEDT 1917 Feb
139: 10:00 Aus AE%sT 1967
140: 10:00 AT AE%sT
141: Zone Australia/Currie 9:35:28 - LMT 1895 Sep
1.1.1.1.4.1 snj 142: 10:00 - AEST 1916 Oct 1 2:00
1.1 apb 143: 10:00 1:00 AEDT 1917 Feb
144: 10:00 Aus AE%sT 1971 Jul
145: 10:00 AT AE%sT
146:
147: # Victoria
148: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
149: Rule AV 1971 1985 - Oct lastSun 2:00s 1:00 D
150: Rule AV 1972 only - Feb lastSun 2:00s 0 S
151: Rule AV 1973 1985 - Mar Sun>=1 2:00s 0 S
152: Rule AV 1986 1990 - Mar Sun>=15 2:00s 0 S
153: Rule AV 1986 1987 - Oct Sun>=15 2:00s 1:00 D
154: Rule AV 1988 1999 - Oct lastSun 2:00s 1:00 D
155: Rule AV 1991 1994 - Mar Sun>=1 2:00s 0 S
156: Rule AV 1995 2005 - Mar lastSun 2:00s 0 S
157: Rule AV 2000 only - Aug lastSun 2:00s 1:00 D
158: Rule AV 2001 2007 - Oct lastSun 2:00s 1:00 D
159: Rule AV 2006 only - Apr Sun>=1 2:00s 0 S
160: Rule AV 2007 only - Mar lastSun 2:00s 0 S
161: Rule AV 2008 max - Apr Sun>=1 2:00s 0 S
162: Rule AV 2008 max - Oct Sun>=1 2:00s 1:00 D
163: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
164: Zone Australia/Melbourne 9:39:52 - LMT 1895 Feb
165: 10:00 Aus AE%sT 1971
166: 10:00 AV AE%sT
167:
168: # New South Wales
169: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
170: Rule AN 1971 1985 - Oct lastSun 2:00s 1:00 D
171: Rule AN 1972 only - Feb 27 2:00s 0 S
172: Rule AN 1973 1981 - Mar Sun>=1 2:00s 0 S
173: Rule AN 1982 only - Apr Sun>=1 2:00s 0 S
174: Rule AN 1983 1985 - Mar Sun>=1 2:00s 0 S
175: Rule AN 1986 1989 - Mar Sun>=15 2:00s 0 S
176: Rule AN 1986 only - Oct 19 2:00s 1:00 D
177: Rule AN 1987 1999 - Oct lastSun 2:00s 1:00 D
178: Rule AN 1990 1995 - Mar Sun>=1 2:00s 0 S
179: Rule AN 1996 2005 - Mar lastSun 2:00s 0 S
180: Rule AN 2000 only - Aug lastSun 2:00s 1:00 D
181: Rule AN 2001 2007 - Oct lastSun 2:00s 1:00 D
182: Rule AN 2006 only - Apr Sun>=1 2:00s 0 S
183: Rule AN 2007 only - Mar lastSun 2:00s 0 S
184: Rule AN 2008 max - Apr Sun>=1 2:00s 0 S
185: Rule AN 2008 max - Oct Sun>=1 2:00s 1:00 D
186: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
187: Zone Australia/Sydney 10:04:52 - LMT 1895 Feb
188: 10:00 Aus AE%sT 1971
189: 10:00 AN AE%sT
190: Zone Australia/Broken_Hill 9:25:48 - LMT 1895 Feb
191: 10:00 - AEST 1896 Aug 23
192: 9:00 - ACST 1899 May
193: 9:30 Aus AC%sT 1971
194: 9:30 AN AC%sT 2000
195: 9:30 AS AC%sT
196:
197: # Lord Howe Island
198: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
199: Rule LH 1981 1984 - Oct lastSun 2:00 1:00 D
200: Rule LH 1982 1985 - Mar Sun>=1 2:00 0 S
201: Rule LH 1985 only - Oct lastSun 2:00 0:30 D
202: Rule LH 1986 1989 - Mar Sun>=15 2:00 0 S
203: Rule LH 1986 only - Oct 19 2:00 0:30 D
204: Rule LH 1987 1999 - Oct lastSun 2:00 0:30 D
205: Rule LH 1990 1995 - Mar Sun>=1 2:00 0 S
206: Rule LH 1996 2005 - Mar lastSun 2:00 0 S
207: Rule LH 2000 only - Aug lastSun 2:00 0:30 D
208: Rule LH 2001 2007 - Oct lastSun 2:00 0:30 D
209: Rule LH 2006 only - Apr Sun>=1 2:00 0 S
210: Rule LH 2007 only - Mar lastSun 2:00 0 S
211: Rule LH 2008 max - Apr Sun>=1 2:00 0 S
212: Rule LH 2008 max - Oct Sun>=1 2:00 0:30 D
213: Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb
214: 10:00 - AEST 1981 Mar
1.1.1.1.4.6 snj 215: 10:30 LH +1030/+1130 1985 Jul
216: 10:30 LH +1030/+11
1.1 apb 217:
218: # Australian miscellany
219: #
220: # Ashmore Is, Cartier
221: # no indigenous inhabitants; only seasonal caretakers
222: # no times are set
223: #
224: # Coral Sea Is
225: # no indigenous inhabitants; only meteorologists
226: # no times are set
227: #
228: # Macquarie
229: # Permanent occupation (scientific station) 1911-1915 and since 25 March 1948;
230: # sealing and penguin oil station operated Nov 1899 to Apr 1919. See the
231: # Tasmania Parks & Wildlife Service history of sealing at Macquarie Island
1.1.1.1.4.1 snj 232: # http://www.parks.tas.gov.au/index.aspx?base=1828
233: # http://www.parks.tas.gov.au/index.aspx?base=1831
1.1 apb 234: # Guess that it was like Australia/Hobart while inhabited before 2010.
235: #
236: # From Steffen Thorsen (2010-03-10):
237: # We got these changes from the Australian Antarctic Division:
238: # - Macquarie Island will stay on UTC+11 for winter and therefore not
239: # switch back from daylight savings time when other parts of Australia do
240: # on 4 April.
241: #
242: # From Arthur David Olson (2013-05-23):
243: # The 1919 transition is overspecified below so pre-2013 zics
244: # will produce a binary file with an [A]EST-type as the first 32-bit type;
245: # this is required for correct handling of times before 1916 by
246: # pre-2013 versions of localtime.
1.1.1.1.4.5 snj 247: Zone Antarctica/Macquarie 0 - -00 1899 Nov
1.1.1.1.4.1 snj 248: 10:00 - AEST 1916 Oct 1 2:00
1.1 apb 249: 10:00 1:00 AEDT 1917 Feb
1.1.1.1.4.1 snj 250: 10:00 Aus AE%sT 1919 Apr 1 0:00s
1.1.1.1.4.5 snj 251: 0 - -00 1948 Mar 25
1.1 apb 252: 10:00 Aus AE%sT 1967
1.1.1.1.4.1 snj 253: 10:00 AT AE%sT 2010 Apr 4 3:00
1.1.1.1.4.6 snj 254: 11:00 - +11
1.1 apb 255:
256: # Christmas
257: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
258: Zone Indian/Christmas 7:02:52 - LMT 1895 Feb
1.1.1.1.4.6 snj 259: 7:00 - +07
1.1 apb 260:
261: # Cocos (Keeling) Is
262: # These islands were ruled by the Ross family from about 1830 to 1978.
263: # We don't know when standard time was introduced; for now, we guess 1900.
264: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
265: Zone Indian/Cocos 6:27:40 - LMT 1900
1.1.1.1.4.6 snj 266: 6:30 - +0630
1.1 apb 267:
268:
269: # Fiji
270:
271: # Milne gives 11:55:44 for Suva.
272:
273: # From Alexander Krivenyshev (2009-11-10):
274: # According to Fiji Broadcasting Corporation, Fiji plans to re-introduce DST
275: # from November 29th 2009 to April 25th 2010.
276: #
277: # "Daylight savings to commence this month"
278: # http://www.radiofiji.com.fj/fullstory.php?id=23719
279: # http://www.worldtimezone.com/dst_news/dst_news_fiji01.html
280:
281: # From Steffen Thorsen (2009-11-10):
282: # The Fiji Government has posted some more details about the approved
283: # amendments:
284: # http://www.fiji.gov.fj/publish/page_16198.shtml
285:
286: # From Steffen Thorsen (2010-03-03):
287: # The Cabinet in Fiji has decided to end DST about a month early, on
288: # 2010-03-28 at 03:00.
289: # The plan is to observe DST again, from 2010-10-24 to sometime in March
290: # 2011 (last Sunday a good guess?).
291: #
292: # Official source:
293: # http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=1096:3310-cabinet-approves-change-in-daylight-savings-dates&catid=49:cabinet-releases&Itemid=166
294: #
295: # A bit more background info here:
1.1.1.1.4.7! snj 296: # https://www.timeanddate.com/news/time/fiji-dst-ends-march-2010.html
1.1 apb 297:
298: # From Alexander Krivenyshev (2010-10-24):
299: # According to Radio Fiji and Fiji Times online, Fiji will end DST 3
300: # weeks earlier than expected - on March 6, 2011, not March 27, 2011...
301: # Here is confirmation from Government of the Republic of the Fiji Islands,
302: # Ministry of Information (fiji.gov.fj) web site:
303: # http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=2608:daylight-savings&catid=71:press-releases&Itemid=155
304: # http://www.worldtimezone.com/dst_news/dst_news_fiji04.html
305:
306: # From Steffen Thorsen (2011-10-03):
307: # Now the dates have been confirmed, and at least our start date
308: # assumption was correct (end date was one week wrong).
309: #
310: # http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=4966:daylight-saving-starts-in-fiji&catid=71:press-releases&Itemid=155
311: # which says
312: # Members of the public are reminded to change their time to one hour in
313: # advance at 2am to 3am on October 23, 2011 and one hour back at 3am to
314: # 2am on February 26 next year.
315:
316: # From Ken Rylander (2011-10-24)
317: # Another change to the Fiji DST end date. In the TZ database the end date for
318: # Fiji DST 2012, is currently Feb 26. This has been changed to Jan 22.
319: #
320: # http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=5017:amendments-to-daylight-savings&catid=71:press-releases&Itemid=155
321: # states:
322: #
323: # The end of daylight saving scheduled initially for the 26th of February 2012
324: # has been brought forward to the 22nd of January 2012.
325: # The commencement of daylight saving will remain unchanged and start
326: # on the 23rd of October, 2011.
327:
328: # From the Fiji Government Online Portal (2012-08-21) via Steffen Thorsen:
329: # The Minister for Labour, Industrial Relations and Employment Mr Jone Usamate
330: # today confirmed that Fiji will start daylight savings at 2 am on Sunday 21st
331: # October 2012 and end at 3 am on Sunday 20th January 2013.
332: # http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=6702&catid=71&Itemid=155
333:
334: # From the Fijian Government Media Center (2013-08-30) via David Wheeler:
335: # Fiji will start daylight savings on Sunday 27th October, 2013 ...
336: # move clocks forward by one hour from 2am
337: # http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVING-STARTS-ON-SUNDAY,-27th-OCTOBER-201.aspx
338:
339: # From Steffen Thorsen (2013-01-10):
340: # Fiji will end DST on 2014-01-19 02:00:
341: # http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVINGS-TO-END-THIS-MONTH-%281%29.aspx
342:
1.1.1.1.4.2 snj 343: # From Ken Rylander (2014-10-20):
344: # DST will start Nov. 2 this year.
345: # http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVING-STARTS-ON-SUNDAY,-NOVEMBER-2ND.aspx
346:
1.1.1.1.4.4 snj 347: # From a government order dated 2015-08-26 and published as Legal Notice No. 77
348: # in the Government of Fiji Gazette Supplement No. 24 (2015-08-28),
349: # via Ken Rylander (2015-09-02):
350: # the daylight saving period is 1 hour in advance of the standard time
351: # commencing at 2.00 am on Sunday 1st November, 2015 and ending at
352: # 3.00 am on Sunday 17th January, 2016.
353:
1.1.1.1.4.5 snj 354: # From Raymond Kumar (2016-10-04):
355: # http://www.fiji.gov.fj/Media-Center/Press-Releases/DAYLIGHT-SAVING-STARTS-ON-6th-NOVEMBER,-2016.aspx
356: # "Fiji's daylight savings will begin on Sunday, 6 November 2016, when
357: # clocks go forward an hour at 2am to 3am.... Daylight Saving will
358: # end at 3.00am on Sunday 15th January 2017."
359:
1.1.1.1.4.7! snj 360: # From Paul Eggert (2017-08-21):
! 361: # Dominic Fok writes (2017-08-20) that DST ends 2018-01-14, citing
! 362: # Extraordinary Government of Fiji Gazette Supplement No. 21 (2017-08-27),
! 363: # [Legal Notice No. 41] of an order of the previous day by J Usamate.
! 364: # For now, guess DST from 02:00 the first Sunday in November to 03:00
! 365: # the first Sunday on or after January 14. Although ad hoc, it matches
1.1.1.1.4.4 snj 366: # transitions since late 2014 and seems more likely to match future
1.1.1.1.4.2 snj 367: # practice than guessing no DST.
1.1 apb 368:
369: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
370: Rule Fiji 1998 1999 - Nov Sun>=1 2:00 1:00 S
371: Rule Fiji 1999 2000 - Feb lastSun 3:00 0 -
372: Rule Fiji 2009 only - Nov 29 2:00 1:00 S
373: Rule Fiji 2010 only - Mar lastSun 3:00 0 -
1.1.1.1.4.2 snj 374: Rule Fiji 2010 2013 - Oct Sun>=21 2:00 1:00 S
1.1 apb 375: Rule Fiji 2011 only - Mar Sun>=1 3:00 0 -
376: Rule Fiji 2012 2013 - Jan Sun>=18 3:00 0 -
1.1.1.1.4.2 snj 377: Rule Fiji 2014 only - Jan Sun>=18 2:00 0 -
378: Rule Fiji 2014 max - Nov Sun>=1 2:00 1:00 S
1.1.1.1.4.7! snj 379: Rule Fiji 2015 max - Jan Sun>=14 3:00 0 -
1.1 apb 380: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 381: Zone Pacific/Fiji 11:55:44 - LMT 1915 Oct 26 # Suva
1.1.1.1.4.6 snj 382: 12:00 Fiji +12/+13
1.1 apb 383:
384: # French Polynesia
385: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 386: Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct # Rikitea
1.1.1.1.4.6 snj 387: -9:00 - -09
1.1 apb 388: Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct
1.1.1.1.4.6 snj 389: -9:30 - -0930
1.1.1.1.4.1 snj 390: Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct # Papeete
1.1.1.1.4.6 snj 391: -10:00 - -10
1.1 apb 392: # Clipperton (near North America) is administered from French Polynesia;
393: # it is uninhabited.
394:
395: # Guam
396: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
397: Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31
1.1.1.1.4.1 snj 398: 9:39:00 - LMT 1901 # Agana
399: 10:00 - GST 2000 Dec 23 # Guam
1.1 apb 400: 10:00 - ChST # Chamorro Standard Time
1.1.1.1.4.3 snj 401: Link Pacific/Guam Pacific/Saipan # N Mariana Is
1.1 apb 402:
403: # Kiribati
404: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 405: Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki
1.1.1.1.4.6 snj 406: 12:00 - +12
1.1 apb 407: Zone Pacific/Enderbury -11:24:20 - LMT 1901
1.1.1.1.4.6 snj 408: -12:00 - -12 1979 Oct
409: -11:00 - -11 1995
410: 13:00 - +13
1.1 apb 411: Zone Pacific/Kiritimati -10:29:20 - LMT 1901
1.1.1.1.4.6 snj 412: -10:40 - -1040 1979 Oct
413: -10:00 - -10 1995
414: 14:00 - +14
1.1 apb 415:
416: # N Mariana Is
1.1.1.1.4.3 snj 417: # See Pacific/Guam.
1.1 apb 418:
419: # Marshall Is
420: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
421: Zone Pacific/Majuro 11:24:48 - LMT 1901
1.1.1.1.4.6 snj 422: 11:00 - +11 1969 Oct
423: 12:00 - +12
1.1 apb 424: Zone Pacific/Kwajalein 11:09:20 - LMT 1901
1.1.1.1.4.6 snj 425: 11:00 - +11 1969 Oct
426: -12:00 - -12 1993 Aug 20
427: 12:00 - +12
1.1 apb 428:
429: # Micronesia
430: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
431: Zone Pacific/Chuuk 10:07:08 - LMT 1901
1.1.1.1.4.6 snj 432: 10:00 - +10
1.1.1.1.4.1 snj 433: Zone Pacific/Pohnpei 10:32:52 - LMT 1901 # Kolonia
1.1.1.1.4.6 snj 434: 11:00 - +11
1.1 apb 435: Zone Pacific/Kosrae 10:51:56 - LMT 1901
1.1.1.1.4.6 snj 436: 11:00 - +11 1969 Oct
437: 12:00 - +12 1999
438: 11:00 - +11
1.1 apb 439:
440: # Nauru
441: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 442: Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe
1.1.1.1.4.6 snj 443: 11:30 - +1130 1942 Mar 15
444: 9:00 - +09 1944 Aug 15
445: 11:30 - +1130 1979 May
446: 12:00 - +12
1.1 apb 447:
448: # New Caledonia
449: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
450: Rule NC 1977 1978 - Dec Sun>=1 0:00 1:00 S
451: Rule NC 1978 1979 - Feb 27 0:00 0 -
452: Rule NC 1996 only - Dec 1 2:00s 1:00 S
453: # Shanks & Pottenger say the following was at 2:00; go with IATA.
454: Rule NC 1997 only - Mar 2 2:00s 0 -
455: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
456: Zone Pacific/Noumea 11:05:48 - LMT 1912 Jan 13 # Nouméa
1.1.1.1.4.6 snj 457: 11:00 NC +11/+12
1.1 apb 458:
459:
460: ###############################################################################
461:
462: # New Zealand
463:
464: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
465: Rule NZ 1927 only - Nov 6 2:00 1:00 S
466: Rule NZ 1928 only - Mar 4 2:00 0 M
467: Rule NZ 1928 1933 - Oct Sun>=8 2:00 0:30 S
468: Rule NZ 1929 1933 - Mar Sun>=15 2:00 0 M
469: Rule NZ 1934 1940 - Apr lastSun 2:00 0 M
470: Rule NZ 1934 1940 - Sep lastSun 2:00 0:30 S
471: Rule NZ 1946 only - Jan 1 0:00 0 S
472: # Since 1957 Chatham has been 45 minutes ahead of NZ, but there's no
473: # convenient single notation for the date and time of this transition
474: # so we must duplicate the Rule lines.
475: Rule NZ 1974 only - Nov Sun>=1 2:00s 1:00 D
476: Rule Chatham 1974 only - Nov Sun>=1 2:45s 1:00 D
477: Rule NZ 1975 only - Feb lastSun 2:00s 0 S
478: Rule Chatham 1975 only - Feb lastSun 2:45s 0 S
479: Rule NZ 1975 1988 - Oct lastSun 2:00s 1:00 D
480: Rule Chatham 1975 1988 - Oct lastSun 2:45s 1:00 D
481: Rule NZ 1976 1989 - Mar Sun>=1 2:00s 0 S
482: Rule Chatham 1976 1989 - Mar Sun>=1 2:45s 0 S
483: Rule NZ 1989 only - Oct Sun>=8 2:00s 1:00 D
484: Rule Chatham 1989 only - Oct Sun>=8 2:45s 1:00 D
485: Rule NZ 1990 2006 - Oct Sun>=1 2:00s 1:00 D
486: Rule Chatham 1990 2006 - Oct Sun>=1 2:45s 1:00 D
487: Rule NZ 1990 2007 - Mar Sun>=15 2:00s 0 S
488: Rule Chatham 1990 2007 - Mar Sun>=15 2:45s 0 S
489: Rule NZ 2007 max - Sep lastSun 2:00s 1:00 D
490: Rule Chatham 2007 max - Sep lastSun 2:45s 1:00 D
491: Rule NZ 2008 max - Apr Sun>=1 2:00s 0 S
492: Rule Chatham 2008 max - Apr Sun>=1 2:45s 0 S
493: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
494: Zone Pacific/Auckland 11:39:04 - LMT 1868 Nov 2
495: 11:30 NZ NZ%sT 1946 Jan 1
496: 12:00 NZ NZ%sT
497: Zone Pacific/Chatham 12:13:48 - LMT 1868 Nov 2
1.1.1.1.4.6 snj 498: 12:15 - +1215 1946 Jan 1
499: 12:45 Chatham +1245/+1345
1.1 apb 500:
501: Link Pacific/Auckland Antarctica/McMurdo
502:
503: # Auckland Is
504: # uninhabited; Māori and Moriori, colonial settlers, pastoralists, sealers,
505: # and scientific personnel have wintered
506:
507: # Campbell I
508: # minor whaling stations operated 1909/1914
509: # scientific station operated 1941/1995;
510: # previously whalers, sealers, pastoralists, and scientific personnel wintered
511: # was probably like Pacific/Auckland
512:
513: # Cook Is
514: # From Shanks & Pottenger:
515: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
516: Rule Cook 1978 only - Nov 12 0:00 0:30 HS
517: Rule Cook 1979 1991 - Mar Sun>=1 0:00 0 -
518: Rule Cook 1979 1990 - Oct lastSun 0:00 0:30 HS
519: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 520: Zone Pacific/Rarotonga -10:39:04 - LMT 1901 # Avarua
1.1.1.1.4.6 snj 521: -10:30 - -1030 1978 Nov 12
522: -10:00 Cook -10/-0930
1.1 apb 523:
524: ###############################################################################
525:
526:
527: # Niue
528: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 529: Zone Pacific/Niue -11:19:40 - LMT 1901 # Alofi
1.1.1.1.4.6 snj 530: -11:20 - -1120 1951
531: -11:30 - -1130 1978 Oct 1
532: -11:00 - -11
1.1 apb 533:
534: # Norfolk
535: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 536: Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston
1.1.1.1.4.6 snj 537: 11:12 - +1112 1951
538: 11:30 - +1130 1974 Oct 27 02:00
539: 11:30 1:00 +1230 1975 Mar 2 02:00
540: 11:30 - +1130 2015 Oct 4 02:00
541: 11:00 - +11
1.1 apb 542:
543: # Palau (Belau)
544: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 545: Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror
1.1.1.1.4.6 snj 546: 9:00 - +09
1.1 apb 547:
548: # Papua New Guinea
549: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
550: Zone Pacific/Port_Moresby 9:48:40 - LMT 1880
1.1.1.1.4.1 snj 551: 9:48:32 - PMMT 1895 # Port Moresby Mean Time
1.1.1.1.4.6 snj 552: 10:00 - +10
1.1.1.1.4.2 snj 553: #
554: # From Paul Eggert (2014-10-13):
555: # Base the Bougainville entry on the Arawa-Kieta region, which appears to have
556: # the most people even though it was devastated in the Bougainville Civil War.
557: #
1.1.1.1.4.5 snj 558: # Although Shanks gives 1942-03-15 / 1943-11-01 for UT +09, these dates
1.1.1.1.4.2 snj 559: # are apparently rough guesswork from the starts of military campaigns.
560: # The World War II entries below are instead based on Arawa-Kieta.
561: # The Japanese occupied Kieta in July 1942,
562: # according to the Pacific War Online Encyclopedia
1.1.1.1.4.7! snj 563: # https://pwencycl.kgbudge.com/B/o/Bougainville.htm
1.1.1.1.4.2 snj 564: # and seem to have controlled it until their 1945-08-21 surrender.
565: #
1.1.1.1.4.5 snj 566: # The Autonomous Region of Bougainville switched from UT +10 to +11
1.1.1.1.4.6 snj 567: # on 2014-12-28 at 02:00. They call +11 "Bougainville Standard Time".
568: # See:
1.1.1.1.4.2 snj 569: # http://www.bougainville24.com/bougainville-issues/bougainville-gets-own-timezone/
570: #
571: Zone Pacific/Bougainville 10:22:16 - LMT 1880
572: 9:48:32 - PMMT 1895
1.1.1.1.4.6 snj 573: 10:00 - +10 1942 Jul
574: 9:00 - +09 1945 Aug 21
575: 10:00 - +10 2014 Dec 28 2:00
576: 11:00 - +11
1.1 apb 577:
578: # Pitcairn
579: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 580: Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown
1.1.1.1.4.6 snj 581: -8:30 - -0830 1998 Apr 27 0:00
582: -8:00 - -08
1.1 apb 583:
584: # American Samoa
1.1.1.1.4.7! snj 585: Zone Pacific/Pago_Pago 12:37:12 - LMT 1892 Jul 5
1.1 apb 586: -11:22:48 - LMT 1911
1.1.1.1.4.1 snj 587: -11:00 - SST # S=Samoa
1.1.1.1.4.3 snj 588: Link Pacific/Pago_Pago Pacific/Midway # in US minor outlying islands
1.1 apb 589:
590: # Samoa (formerly and also known as Western Samoa)
591:
592: # From Steffen Thorsen (2009-10-16):
593: # We have been in contact with the government of Samoa again, and received
594: # the following info:
595: #
596: # "Cabinet has now approved Daylight Saving to be effected next year
597: # commencing from the last Sunday of September 2010 and conclude first
598: # Sunday of April 2011."
599: #
600: # Background info:
1.1.1.1.4.7! snj 601: # https://www.timeanddate.com/news/time/samoa-dst-plan-2009.html
1.1 apb 602: #
603: # Samoa's Daylight Saving Time Act 2009 is available here, but does not
604: # contain any dates:
605: # http://www.parliament.gov.ws/documents/acts/Daylight%20Saving%20Act%20%202009%20%28English%29%20-%20Final%207-7-091.pdf
606:
607: # From Laupue Raymond Hughes (2010-10-07):
608: # Please see
609: # http://www.mcil.gov.ws
610: # the Ministry of Commerce, Industry and Labour (sideframe) "Last Sunday
611: # September 2010 (26/09/10) - adjust clocks forward from 12:00 midnight
612: # to 01:00am and First Sunday April 2011 (03/04/11) - adjust clocks
613: # backwards from 1:00am to 12:00am"
614:
615: # From Laupue Raymond Hughes (2011-03-07):
616: # [http://www.mcil.gov.ws/ftcd/daylight_saving_2011.pdf]
617: #
618: # ... when the standard time strikes the hour of four o'clock (4.00am
619: # or 0400 Hours) on the 2nd April 2011, then all instruments used to
620: # measure standard time are to be adjusted/changed to three o'clock
621: # (3:00am or 0300Hrs).
622:
623: # From David Zülke (2011-05-09):
624: # Subject: Samoa to move timezone from east to west of international date line
625: #
626: # http://www.morningstar.co.uk/uk/markets/newsfeeditem.aspx?id=138501958347963
627:
628: # From Paul Eggert (2014-06-27):
629: # The International Date Line Act 2011
630: # http://www.parliament.gov.ws/images/ACTS/International_Date_Line_Act__2011_-_Eng.pdf
1.1.1.1.4.5 snj 631: # changed Samoa from UT -11 to +13, effective "12 o'clock midnight, on
1.1 apb 632: # Thursday 29th December 2011". The International Date Line was adjusted
633: # accordingly.
634:
635: # From Laupue Raymond Hughes (2011-09-02):
636: # http://www.mcil.gov.ws/mcil_publications.html
637: #
638: # here is the official website publication for Samoa DST and dateline change
639: #
640: # DST
641: # Year End Time Start Time
642: # 2011 - - - - - - 24 September 3:00am to 4:00am
643: # 2012 01 April 4:00am to 3:00am - - - - - -
644: #
645: # Dateline Change skip Friday 30th Dec 2011
646: # Thursday 29th December 2011 23:59:59 Hours
647: # Saturday 31st December 2011 00:00:00 Hours
648: #
649: # From Nicholas Pereira (2012-09-10):
650: # Daylight Saving Time commences on Sunday 30th September 2012 and
651: # ends on Sunday 7th of April 2013....
652: # http://www.mcil.gov.ws/mcil_publications.html
653: #
654: # From Paul Eggert (2014-07-08):
655: # That web page currently lists transitions for 2012/3 and 2013/4.
656: # Assume the pattern instituted in 2012 will continue indefinitely.
657:
658: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
659: Rule WS 2010 only - Sep lastSun 0:00 1 D
660: Rule WS 2011 only - Apr Sat>=1 4:00 0 S
661: Rule WS 2011 only - Sep lastSat 3:00 1 D
662: Rule WS 2012 max - Apr Sun>=1 4:00 0 S
663: Rule WS 2012 max - Sep lastSun 3:00 1 D
664: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.7! snj 665: Zone Pacific/Apia 12:33:04 - LMT 1892 Jul 5
1.1 apb 666: -11:26:56 - LMT 1911
1.1.1.1.4.6 snj 667: -11:30 - -1130 1950
668: -11:00 WS -11/-10 2011 Dec 29 24:00
669: 13:00 WS +13/+14
1.1 apb 670:
671: # Solomon Is
672: # excludes Bougainville, for which see Papua New Guinea
673: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 674: Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct # Honiara
1.1.1.1.4.6 snj 675: 11:00 - +11
1.1 apb 676:
1.1.1.1.4.6 snj 677: # Tokelau
1.1 apb 678: #
679: # From Gwillim Law (2011-12-29)
680: # A correspondent informed me that Tokelau, like Samoa, will be skipping
681: # December 31 this year ...
682: #
683: # From Steffen Thorsen (2012-07-25)
684: # ... we double checked by calling hotels and offices based in Tokelau asking
685: # about the time there, and they all told a time that agrees with UTC+13....
686: # Shanks says UTC-10 from 1901 [but] ... there is a good chance the change
687: # actually was to UTC-11 back then.
688: #
689: # From Paul Eggert (2012-07-25)
690: # A Google Books snippet of Appendix to the Journals of the House of
691: # Representatives of New Zealand, Session 1948,
1.1.1.1.4.7! snj 692: # <https://books.google.com/books?id=ZaVCAQAAIAAJ>, page 65, says Tokelau
1.1 apb 693: # was "11 hours slow on G.M.T." Go with Thorsen and assume Shanks & Pottenger
694: # are off by an hour starting in 1901.
695:
696: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
697: Zone Pacific/Fakaofo -11:24:56 - LMT 1901
1.1.1.1.4.6 snj 698: -11:00 - -11 2011 Dec 30
699: 13:00 - +13
1.1 apb 700:
701: # Tonga
702: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
703: Rule Tonga 1999 only - Oct 7 2:00s 1:00 S
704: Rule Tonga 2000 only - Mar 19 2:00s 0 -
705: Rule Tonga 2000 2001 - Nov Sun>=1 2:00 1:00 S
706: Rule Tonga 2001 2002 - Jan lastSun 2:00 0 -
1.1.1.1.4.7! snj 707: Rule Tonga 2016 only - Nov Sun>=1 2:00 1:00 S
! 708: Rule Tonga 2017 only - Jan Sun>=15 3:00 0 -
1.1 apb 709: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
710: Zone Pacific/Tongatapu 12:19:20 - LMT 1901
1.1.1.1.4.5 snj 711: 12:20 - +1220 1941
712: 13:00 - +13 1999
713: 13:00 Tonga +13/+14
1.1 apb 714:
715: # Tuvalu
716: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
717: Zone Pacific/Funafuti 11:56:52 - LMT 1901
1.1.1.1.4.6 snj 718: 12:00 - +12
1.1 apb 719:
720:
721: # US minor outlying islands
722:
723: # Howland, Baker
724: # Howland was mined for guano by American companies 1857-1878 and British
725: # 1886-1891; Baker was similar but exact dates are not known.
726: # Inhabited by civilians 1935-1942; U.S. military bases 1943-1944;
727: # uninhabited thereafter.
1.1.1.1.4.5 snj 728: # Howland observed Hawaii Standard Time (UT -10:30) in 1937;
1.1 apb 729: # see page 206 of Elgen M. Long and Marie K. Long,
730: # Amelia Earhart: the Mystery Solved, Simon & Schuster (2000).
731: # So most likely Howland and Baker observed Hawaii Time from 1935
732: # until they were abandoned after the war.
733:
734: # Jarvis
735: # Mined for guano by American companies 1857-1879 and British 1883?-1891?.
736: # Inhabited by civilians 1935-1942; IGY scientific base 1957-1958;
737: # uninhabited thereafter.
738: # no information; was probably like Pacific/Kiritimati
739:
740: # Johnston
741: #
1.1.1.1.4.6 snj 742: # From Paul Eggert (2017-02-10):
1.1 apb 743: # Sometimes Johnston kept Hawaii time, and sometimes it was an hour behind.
744: # Details are uncertain. We have no data for Johnston after 1970, so
1.1.1.1.4.6 snj 745: # treat it like Hawaii for now. Since Johnston is now uninhabited,
746: # its link to Pacific/Honolulu is in the 'backward' file.
1.1 apb 747: #
748: # In his memoirs of June 6th to October 4, 1945
749: # <http://www.315bw.org/Herb_Bach.htm> (2005), Herbert C. Bach writes,
750: # "We started our letdown to Kwajalein Atoll and landed there at 5:00 AM
751: # Johnston time, 1:30 AM Kwajalein time." This was in June 1945, and
752: # confirms that Johnston kept the same time as Honolulu in summer 1945.
753: #
754: # From Lyle McElhaney (2014-03-11):
755: # [W]hen JI was being used for that [atomic bomb] testing, the time being used
756: # was not Hawaiian time but rather the same time being used on the ships,
757: # which had a GMT offset of -11 hours. This apparently applied to at least the
758: # time from Operation Newsreel (Hardtack I/Teak shot, 1958-08-01) to the last
759: # Operation Fishbowl shot (Tightrope, 1962-11-04).... [See] Herman Hoerlin,
760: # "The United States High-Altitude Test Experience: A Review Emphasizing the
1.1.1.1.4.1 snj 761: # Impact on the Environment", Los Alamos LA-6405, Oct 1976.
1.1.1.1.4.7! snj 762: # https://www.fas.org/sgp/othergov/doe/lanl/docs1/00322994.pdf
1.1 apb 763: # See the table on page 4 where he lists GMT and local times for the tests; a
764: # footnote for the JI tests reads that local time is "JI time = Hawaii Time
765: # Minus One Hour".
766:
767: # Kingman
768: # uninhabited
769:
770: # Midway
1.1.1.1.4.3 snj 771: # See Pacific/Pago_Pago.
1.1 apb 772:
773: # Palmyra
774: # uninhabited since World War II; was probably like Pacific/Kiritimati
775:
776: # Wake
777: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
778: Zone Pacific/Wake 11:06:28 - LMT 1901
1.1.1.1.4.6 snj 779: 12:00 - +12
1.1 apb 780:
781:
782: # Vanuatu
783: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
784: Rule Vanuatu 1983 only - Sep 25 0:00 1:00 S
785: Rule Vanuatu 1984 1991 - Mar Sun>=23 0:00 0 -
786: Rule Vanuatu 1984 only - Oct 23 0:00 1:00 S
787: Rule Vanuatu 1985 1991 - Sep Sun>=23 0:00 1:00 S
788: Rule Vanuatu 1992 1993 - Jan Sun>=23 0:00 0 -
789: Rule Vanuatu 1992 only - Oct Sun>=23 0:00 1:00 S
790: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1.1.1.1.4.1 snj 791: Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
1.1.1.1.4.6 snj 792: 11:00 Vanuatu +11/+12
1.1 apb 793:
794: # Wallis and Futuna
795: # Zone NAME GMTOFF RULES FORMAT [UNTIL]
796: Zone Pacific/Wallis 12:15:20 - LMT 1901
1.1.1.1.4.6 snj 797: 12:00 - +12
1.1 apb 798:
799: ###############################################################################
800:
801: # NOTES
802:
1.1.1.1.4.1 snj 803: # This file is by no means authoritative; if you think you know better,
1.1 apb 804: # go ahead and edit the file (and please send any changes to
1.1.1.1.4.1 snj 805: # tz@iana.org for general use in the future). For more, please see
806: # the file CONTRIBUTING in the tz distribution.
1.1 apb 807:
1.1.1.1.4.6 snj 808: # From Paul Eggert (2017-02-10):
1.1.1.1.4.2 snj 809: #
810: # Unless otherwise specified, the source for data through 1990 is:
1.1 apb 811: # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
812: # San Diego: ACS Publications, Inc. (2003).
1.1.1.1.4.2 snj 813: # Unfortunately this book contains many errors and cites no sources.
1.1 apb 814: #
1.1.1.1.4.6 snj 815: # Many years ago Gwillim Law wrote that a good source
816: # for time zone data was the International Air Transport
1.1 apb 817: # Association's Standard Schedules Information Manual (IATA SSIM),
818: # published semiannually. Law sent in several helpful summaries
1.1.1.1.4.2 snj 819: # of the IATA's data after 1990. Except where otherwise noted,
820: # IATA SSIM is the source for entries after 1990.
1.1 apb 821: #
822: # Another source occasionally used is Edward W. Whitman, World Time Differences,
823: # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
824: # I found in the UCLA library.
825: #
826: # For data circa 1899, a common source is:
1.1.1.1.4.1 snj 827: # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
1.1.1.1.4.7! snj 828: # https://www.jstor.org/stable/1774359
1.1 apb 829: #
830: # A reliable and entertaining source about time zones is
831: # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
832: #
1.1.1.1.4.6 snj 833: # The following abbreviations are from other sources.
1.1 apb 834: # Corrections are welcome!
835: # std dst
836: # LMT Local Mean Time
837: # 8:00 AWST AWDT Western Australia
838: # 9:30 ACST ACDT Central Australia
839: # 10:00 AEST AEDT Eastern Australia
1.1.1.1.4.6 snj 840: # 10:00 GST Guam through 2000
1.1 apb 841: # 10:00 ChST Chamorro
842: # 11:30 NZMT NZST New Zealand through 1945
843: # 12:00 NZST NZDT New Zealand 1946-present
844: # -11:00 SST Samoa
845: # -10:00 HST Hawaii
846: #
847: # See the 'northamerica' file for Hawaii.
848: # See the 'southamerica' file for Easter I and the Galápagos Is.
849:
850: ###############################################################################
851:
852: # Australia
853:
854: # From Paul Eggert (2014-06-30):
855: # Daylight saving time has long been controversial in Australia, pitting
856: # region against region, rural against urban, and local against global.
857: # For example, in her review of Graeme Davison's _The Unforgiving
858: # Minute: how Australians learned to tell the time_ (1993), Perth native
859: # Phillipa J Martyr wrote, "The section entitled 'Saving Daylight' was
860: # very informative, but was (as can, sadly, only be expected from a
861: # Melbourne-based study) replete with the usual chuckleheaded
862: # Queenslanders and straw-chewing yokels from the West prattling fables
863: # about fading curtains and crazed farm animals."
864: # Electronic Journal of Australian and New Zealand History (1997-03-03)
865: # http://www.jcu.edu.au/aff/history/reviews/davison.htm
866:
867: # From Paul Eggert (2005-12-08):
868: # Implementation Dates of Daylight Saving Time within Australia
1.1.1.1.4.1 snj 869: # http://www.bom.gov.au/climate/averages/tables/dst_times.shtml
1.1 apb 870: # summarizes daylight saving issues in Australia.
871:
872: # From Arthur David Olson (2005-12-12):
873: # Lawlink NSW:Daylight Saving in New South Wales
1.1.1.1.4.1 snj 874: # http://www.lawlink.nsw.gov.au/lawlink/Corporate/ll_agdinfo.nsf/pages/community_relations_daylight_saving
1.1 apb 875: # covers New South Wales in particular.
876:
877: # From John Mackin (1991-03-06):
878: # We in Australia have _never_ referred to DST as 'daylight' time.
879: # It is called 'summer' time. Now by a happy coincidence, 'summer'
880: # and 'standard' happen to start with the same letter; hence, the
881: # abbreviation does _not_ change...
882: # The legislation does not actually define abbreviations, at least
883: # in this State, but the abbreviation is just commonly taken to be the
884: # initials of the phrase, and the legislation here uniformly uses
885: # the phrase 'summer time' and does not use the phrase 'daylight
886: # time'.
887: # Announcers on the Commonwealth radio network, the ABC (for Australian
888: # Broadcasting Commission), use the phrases 'Eastern Standard Time'
889: # or 'Eastern Summer Time'. (Note, though, that as I say in the
890: # current australasia file, there is really no such thing.) Announcers
891: # on its overseas service, Radio Australia, use the same phrases
892: # prefixed by the word 'Australian' when referring to local times;
893: # time announcements on that service, naturally enough, are made in UTC.
894:
895: # From Paul Eggert (2014-06-30):
896: #
897: # Inspired by Mackin's remarks quoted above, earlier versions of this
898: # file used "EST" for both Eastern Standard Time and Eastern Summer
899: # Time in Australia, and similarly for "CST", "CWST", and "WST".
900: # However, these abbreviations were confusing and were not common
901: # practice among Australians, and there were justifiable complaints
902: # about them, so I attempted to survey current Australian usage.
903: # For the tz database, the full English phrase is not that important;
904: # what matters is the abbreviation. It's difficult to survey the web
905: # directly for abbreviation usage, as there are so many false hits for
906: # strings like "EST" and "EDT", so I looked for pages that defined an
907: # abbreviation for eastern or central DST in Australia, and got the
908: # following numbers of unique hits for the listed Google queries:
909: #
910: # 10 "Eastern Daylight Time AEST" site:au [some are false hits]
911: # 10 "Eastern Summer Time AEST" site:au
912: # 10 "Summer Time AEDT" site:au
913: # 13 "EDST Eastern Daylight Saving Time" site:au
914: # 18 "Summer Time ESST" site:au
915: # 28 "Eastern Daylight Saving Time EDST" site:au
916: # 39 "EDT Eastern Daylight Time" site:au [some are false hits]
917: # 53 "Eastern Daylight Time EDT" site:au [some are false hits]
918: # 54 "AEDT Australian Eastern Daylight Time" site:au
919: # 182 "Eastern Daylight Time AEDT" site:au
920: #
921: # 17 "Central Daylight Time CDT" site:au [some are false hits]
922: # 46 "Central Daylight Time ACDT" site:au
923: #
924: # I tried several other variants (e.g., "Eastern Summer Time EST") but
925: # they all returned fewer than 10 unique hits. I also looked for pages
926: # mentioning both "western standard time" and an abbreviation, since
927: # there is no WST in the US to generate false hits, and found:
928: #
929: # 156 "western standard time" AWST site:au
930: # 226 "western standard time" WST site:au
931: #
932: # I then surveyed the top ten newspapers in Australia by circulation as
933: # listed in Wikipedia, using Google queries like "AEDT site:heraldsun.com.au"
934: # and obtaining estimated counts from the initial page of search results.
935: # All ten papers greatly preferred "AEDT" to "EDT". The papers
936: # surveyed were the Herald Sun, The Daily Telegraph, The Courier-Mail,
937: # The Sydney Morning Herald, The West Australian, The Age, The Advertiser,
938: # The Australian, The Financial Review, and The Herald (Newcastle).
939: #
940: # I also searched for historical usage, to see whether abbreviations
941: # like "AEDT" are new. A Trove search <http://trove.nla.gov.au/>
942: # found only one newspaper (The Canberra Times) with a house style
943: # dating back to the 1970s, I expect because other newspapers weren't
944: # fully indexed. The Canberra Times strongly preferred abbreviations
945: # like "AEDT". The first occurrence of "AEDT" was a World Weather
946: # column (1971-11-17, page 24), and of "ACDT" was a Scoreboard column
947: # (1993-01-24, p 16). The style was the typical usage but was not
948: # strictly enforced; for example, "Welcome to the twilight zones ..."
949: # (1994-10-29, p 1) uses the abbreviations AEST/AEDT, CST/CDT, and
950: # WST, and goes on to say, "The confusion and frustration some feel
951: # about the lack of uniformity among Australia's six states and two
952: # territories has prompted one group to form its very own political
953: # party -- the Sydney-based Daylight Saving Extension Party."
954: #
955: # I also surveyed federal government sources. They did not agree:
956: #
957: # The Australian Government (2014-03-26)
958: # http://australia.gov.au/about-australia/our-country/time
959: # (This document was produced by the Department of Finance.)
960: # AEST ACST AWST AEDT ACDT
961: #
962: # Bureau of Meteorology (2012-11-08)
963: # http://www.bom.gov.au/climate/averages/tables/daysavtm.shtml
964: # EST CST WST EDT CDT
965: #
966: # Civil Aviation Safety Authority (undated)
967: # http://services.casa.gov.au/outnback/inc/pages/episode3/episode-3_time_zones.shtml
968: # EST CST WST (no abbreviations given for DST)
969: #
970: # Geoscience Australia (2011-11-24)
971: # http://www.ga.gov.au/geodesy/astro/sunrise.jsp
972: # AEST ACST AWST AEDT ACDT
973: #
974: # Parliamentary Library (2008-11-10)
1.1.1.1.4.7! snj 975: # https://www.aph.gov.au/binaries/library/pubs/rp/2008-09/09rp14.pdf
1.1 apb 976: # EST CST WST preferred for standard time; AEST AEDT ACST ACDT also used
977: #
978: # The Transport Safety Bureau has an extensive series of accident reports,
979: # and investigators seem to use whatever abbreviation they like.
980: # Googling site:atsb.gov.au found the following number of unique hits:
981: # 311 "ESuT", 195 "EDT", 26 "AEDT", 83 "CSuT", 46 "CDT".
982: # "_SuT" tended to appear in older reports, and "A_DT" tended to
983: # appear in reports of events with international implications.
984: #
985: # From the above it appears that there is a working consensus in
986: # Australia to use trailing "DT" for daylight saving time; although
987: # some sources use trailing "SST" or "ST" or "SuT" they are by far in
988: # the minority. The case for leading "A" is weaker, but since it
989: # seems to be preferred in the overall web and is preferred in all
990: # the leading newspaper websites and in many government departments,
991: # it has a stronger case than omitting the leading "A". The current
992: # version of the database therefore uses abbreviations like "AEST" and
993: # "AEDT" for Australian time zones.
994:
995: # From Paul Eggert (1995-12-19):
996: # Shanks & Pottenger report 2:00 for all autumn changes in Australia and NZ.
997: # Mark Prior writes that his newspaper
998: # reports that NSW's fall 1995 change will occur at 2:00,
999: # but Robert Elz says it's been 3:00 in Victoria since 1970
1000: # and perhaps the newspaper's '2:00' is referring to standard time.
1001: # For now we'll continue to assume 2:00s for changes since 1960.
1002:
1003: # From Eric Ulevik (1998-01-05):
1004: #
1005: # Here are some URLs to Australian time legislation. These URLs are stable,
1006: # and should probably be included in the data file. There are probably more
1007: # relevant entries in this database.
1008: #
1009: # NSW (including LHI and Broken Hill):
1010: # Standard Time Act 1987 (updated 1995-04-04)
1.1.1.1.4.7! snj 1011: # https://www.austlii.edu.au/au/legis/nsw/consol_act/sta1987137/index.html
1.1 apb 1012: # ACT
1013: # Standard Time and Summer Time Act 1972
1.1.1.1.4.7! snj 1014: # https://www.austlii.edu.au/au/legis/act/consol_act/stasta1972279/index.html
1.1 apb 1015: # SA
1016: # Standard Time Act, 1898
1.1.1.1.4.7! snj 1017: # https://www.austlii.edu.au/au/legis/sa/consol_act/sta1898137/index.html
1.1 apb 1018:
1019: # From David Grosz (2005-06-13):
1020: # It was announced last week that Daylight Saving would be extended by
1021: # one week next year to allow for the 2006 Commonwealth Games.
1022: # Daylight Saving is now to end for next year only on the first Sunday
1023: # in April instead of the last Sunday in March.
1024: #
1025: # From Gwillim Law (2005-06-14):
1026: # I did some Googling and found that all of those states (and territory) plan
1027: # to extend DST together in 2006.
1028: # ACT: http://www.cmd.act.gov.au/mediareleases/fileread.cfm?file=86.txt
1029: # New South Wales: http://www.thecouriermail.news.com.au/common/story_page/0,5936,15538869%255E1702,00.html
1030: # South Australia: http://www.news.com.au/story/0,10117,15555031-1246,00.html
1031: # Tasmania: http://www.media.tas.gov.au/release.php?id=14772
1032: # Victoria: I wasn't able to find anything separate, but the other articles
1033: # allude to it.
1034: # But not Queensland
1035: # http://www.news.com.au/story/0,10117,15564030-1248,00.html
1036:
1037: # Northern Territory
1038:
1039: # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1040: # # The NORTHERN TERRITORY.. [ Courtesy N.T. Dept of the Chief Minister ]
1041: # # [ Nov 1990 ]
1042: # # N.T. have never utilised any DST due to sub-tropical/tropical location.
1043: # ...
1044: # Zone Australia/North 9:30 - CST
1045:
1046: # From Bradley White (1991-03-04):
1047: # A recent excerpt from an Australian newspaper...
1048: # the Northern Territory do[es] not have daylight saving.
1049:
1050: # Western Australia
1051:
1052: # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1053: # # The state of WESTERN AUSTRALIA.. [ Courtesy W.A. dept Premier+Cabinet ]
1054: # # [ Nov 1990 ]
1055: # # W.A. suffers from a great deal of public and political opposition to
1056: # # DST in principle. A bill is brought before parliament in most years, but
1057: # # usually defeated either in the upper house, or in party caucus
1058: # # before reaching parliament.
1059: # ...
1060: # Zone Australia/West 8:00 AW %sST
1061: # ...
1062: # Rule AW 1974 only - Oct lastSun 2:00 1:00 D
1063: # Rule AW 1975 only - Mar Sun>=1 3:00 0 W
1064: # Rule AW 1983 only - Oct lastSun 2:00 1:00 D
1065: # Rule AW 1984 only - Mar Sun>=1 3:00 0 W
1066:
1067: # From Bradley White (1991-03-04):
1068: # A recent excerpt from an Australian newspaper...
1069: # Western Australia...do[es] not have daylight saving.
1070:
1071: # From John D. Newman via Bradley White (1991-11-02):
1072: # Western Australia is still on "winter time". Some DH in Sydney
1073: # rang me at home a few days ago at 6.00am. (He had just arrived at
1074: # work at 9.00am.)
1075: # W.A. is switching to Summer Time on Nov 17th just to confuse
1076: # everybody again.
1077:
1078: # From Arthur David Olson (1992-03-08):
1079: # The 1992 ending date used in the rules is a best guess;
1080: # it matches what was used in the past.
1081:
1082: # The Australian Bureau of Meteorology FAQ
1.1.1.1.4.1 snj 1083: # http://www.bom.gov.au/faq/faqgen.htm
1.1 apb 1084: # (1999-09-27) writes that Giles Meteorological Station uses
1085: # South Australian time even though it's located in Western Australia.
1086:
1087: # Queensland
1088: # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1089: # # The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ]
1090: # # [ Dec 1990 ]
1091: # ...
1092: # Zone Australia/Queensland 10:00 AQ %sST
1093: # ...
1094: # Rule AQ 1971 only - Oct lastSun 2:00 1:00 D
1095: # Rule AQ 1972 only - Feb lastSun 3:00 0 E
1096: # Rule AQ 1989 max - Oct lastSun 2:00 1:00 D
1097: # Rule AQ 1990 max - Mar Sun>=1 3:00 0 E
1098:
1099: # From Bradley White (1989-12-24):
1100: # "Australia/Queensland" now observes daylight time (i.e. from
1101: # October 1989).
1102:
1103: # From Bradley White (1991-03-04):
1104: # A recent excerpt from an Australian newspaper...
1105: # ...Queensland...[has] agreed to end daylight saving
1106: # at 3am tomorrow (March 3)...
1107:
1108: # From John Mackin (1991-03-06):
1109: # I can certainly confirm for my part that Daylight Saving in NSW did in fact
1110: # end on Sunday, 3 March. I don't know at what hour, though. (It surprised
1111: # me.)
1112:
1113: # From Bradley White (1992-03-08):
1114: # ...there was recently a referendum in Queensland which resulted
1115: # in the experimental daylight saving system being abandoned. So, ...
1116: # ...
1117: # Rule QLD 1989 1991 - Oct lastSun 2:00 1:00 D
1118: # Rule QLD 1990 1992 - Mar Sun>=1 3:00 0 S
1119: # ...
1120:
1121: # From Arthur David Olson (1992-03-08):
1122: # The chosen rules the union of the 1971/1972 change and the 1989-1992 changes.
1123:
1124: # From Christopher Hunt (2006-11-21), after an advance warning
1125: # from Jesper Nørgaard Welen (2006-11-01):
1126: # WA are trialing DST for three years.
1.1.1.1.4.1 snj 1127: # http://www.parliament.wa.gov.au/parliament/bills.nsf/9A1B183144403DA54825721200088DF1/$File/Bill175-1B.pdf
1.1 apb 1128:
1129: # From Rives McDow (2002-04-09):
1130: # The most interesting region I have found consists of three towns on the
1131: # southern coast.... South Australia observes daylight saving time; Western
1132: # Australia does not. The two states are one and a half hours apart. The
1133: # residents decided to forget about this nonsense of changing the clock so
1134: # much and set the local time 20 hours and 45 minutes from the
1135: # international date line, or right in the middle of the time of South
1136: # Australia and Western Australia....
1137: #
1138: # From Paul Eggert (2002-04-09):
1139: # This is confirmed by the section entitled
1140: # "What's the deal with time zones???" in
1.1.1.1.4.1 snj 1141: # http://www.earthsci.unimelb.edu.au/~awatkins/null.html
1.1 apb 1142: #
1143: # From Alex Livingston (2006-12-07):
1144: # ... it was just on four years ago that I drove along the Eyre Highway,
1145: # which passes through eastern Western Australia close to the southern
1146: # coast of the continent.
1147: #
1148: # I paid particular attention to the time kept there. There can be no
1149: # dispute that UTC+08:45 was considered "the time" from the border
1150: # village just inside the border with South Australia to as far west
1151: # as just east of Caiguna. There can also be no dispute that Eucla is
1152: # the largest population centre in this zone....
1153: #
1154: # Now that Western Australia is observing daylight saving, the
1155: # question arose whether this part of the state would follow suit. I
1156: # just called the border village and confirmed that indeed they have,
1157: # meaning that they are now observing UTC+09:45.
1158: #
1159: # (2006-12-09):
1160: # I personally doubt that either experimentation with daylight saving
1161: # in WA or its introduction in SA had anything to do with the genesis
1162: # of this time zone. My hunch is that it's been around since well
1163: # before 1975. I remember seeing it noted on road maps decades ago.
1164:
1165: # From Paul Eggert (2006-12-15):
1166: # For lack of better info, assume the tradition dates back to the
1167: # introduction of standard time in 1895.
1168:
1169:
1170: # southeast Australia
1171: #
1172: # From Paul Eggert (2007-07-23):
1173: # Starting autumn 2008 Victoria, NSW, South Australia, Tasmania and the ACT
1174: # end DST the first Sunday in April and start DST the first Sunday in October.
1175: # http://www.theage.com.au/news/national/daylight-savings-to-span-six-months/2007/06/27/1182623966703.html
1176:
1177:
1178: # South Australia
1179:
1180: # From Bradley White (1991-03-04):
1181: # A recent excerpt from an Australian newspaper...
1182: # ...South Australia...[has] agreed to end daylight saving
1183: # at 3am tomorrow (March 3)...
1184:
1185: # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1186: # # The state of SOUTH AUSTRALIA....[ Courtesy of S.A. Dept of Labour ]
1187: # # [ Nov 1990 ]
1188: # ...
1189: # Zone Australia/South 9:30 AS %sST
1190: # ...
1191: # Rule AS 1971 max - Oct lastSun 2:00 1:00 D
1192: # Rule AS 1972 1985 - Mar Sun>=1 3:00 0 C
1193: # Rule AS 1986 1990 - Mar Sun>=15 3:00 0 C
1194: # Rule AS 1991 max - Mar Sun>=1 3:00 0 C
1195:
1196: # From Bradley White (1992-03-11):
1197: # Recent correspondence with a friend in Adelaide
1198: # contained the following exchange: "Due to the Adelaide Festival,
1199: # South Australia delays setting back our clocks for a few weeks."
1200:
1201: # From Robert Elz (1992-03-13):
1202: # I heard that apparently (or at least, it appears that)
1203: # South Aus will have an extra 3 weeks daylight saving every even
1204: # numbered year (from 1990). That's when the Adelaide Festival
1205: # is on...
1206:
1207: # From Robert Elz (1992-03-16, 00:57:07 +1000):
1208: # DST didn't end in Adelaide today (yesterday)....
1209: # But whether it's "4th Sunday" or "2nd last Sunday" I have no idea whatever...
1210: # (it's just as likely to be "the Sunday we pick for this year"...).
1211:
1212: # From Bradley White (1994-04-11):
1213: # If Sun, 15 March, 1992 was at +1030 as kre asserts, but yet Sun, 20 March,
1214: # 1994 was at +0930 as John Connolly's customer seems to assert, then I can
1215: # only conclude that the actual rule is more complicated....
1216:
1217: # From John Warburton (1994-10-07):
1218: # The new Daylight Savings dates for South Australia ...
1219: # was gazetted in the Government Hansard on Sep 26 1994....
1220: # start on last Sunday in October and end in last sunday in March.
1221:
1222: # From Paul Eggert (2007-07-23):
1223: # See "southeast Australia" above for 2008 and later.
1224:
1225: # Tasmania
1226:
1227: # The rules for 1967 through 1991 were reported by George Shepherd
1228: # via Simon Woodhead via Robert Elz (1991-03-06):
1229: # # The state of TASMANIA.. [Courtesy Tasmanian Dept of Premier + Cabinet ]
1230: # # [ Nov 1990 ]
1231:
1232: # From Bill Hart via Guy Harris (1991-10-10):
1233: # Oh yes, the new daylight savings rules are uniquely tasmanian, we have
1234: # 6 weeks a year now when we are out of sync with the rest of Australia
1235: # (but nothing new about that).
1236:
1237: # From Alex Livingston (1999-10-04):
1238: # I heard on the ABC (Australian Broadcasting Corporation) radio news on the
1239: # (long) weekend that Tasmania, which usually goes its own way in this regard,
1240: # has decided to join with most of NSW, the ACT, and most of Victoria
1241: # (Australia) and start daylight saving on the last Sunday in August in 2000
1242: # instead of the first Sunday in October.
1243:
1244: # Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules:
1245: # http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300
1246:
1247: # From Paul Eggert (2007-07-23):
1248: # See "southeast Australia" above for 2008 and later.
1249:
1250: # Victoria
1251:
1252: # The rules for 1971 through 1991 were reported by George Shepherd
1253: # via Simon Woodhead via Robert Elz (1991-03-06):
1254: # # The state of VICTORIA.. [ Courtesy of Vic. Dept of Premier + Cabinet ]
1255: # # [ Nov 1990 ]
1256:
1257: # From Scott Harrington (2001-08-29):
1258: # On KQED's "City Arts and Lectures" program last night I heard an
1259: # interesting story about daylight savings time. Dr. John Heilbron was
1260: # discussing his book "The Sun in the Church: Cathedrals as Solar
1261: # Observatories"[1], and in particular the Shrine of Remembrance[2] located
1262: # in Melbourne, Australia.
1263: #
1264: # Apparently the shrine's main purpose is a beam of sunlight which
1265: # illuminates a special spot on the floor at the 11th hour of the 11th day
1266: # of the 11th month (Remembrance Day) every year in memory of Australia's
1267: # fallen WWI soldiers. And if you go there on Nov. 11, at 11am local time,
1268: # you will indeed see the sunbeam illuminate the special spot at the
1269: # expected time.
1270: #
1271: # However, that is only because of some special mirror contraption that had
1272: # to be employed, since due to daylight savings time, the true solar time of
1273: # the remembrance moment occurs one hour later (or earlier?). Perhaps
1274: # someone with more information on this jury-rig can tell us more.
1275: #
1276: # [1] http://www.hup.harvard.edu/catalog/HEISUN.html
1277: # [2] http://www.shrine.org.au
1278:
1279: # From Paul Eggert (2007-07-23):
1280: # See "southeast Australia" above for 2008 and later.
1281:
1282: # New South Wales
1283:
1284: # From Arthur David Olson:
1285: # New South Wales and subjurisdictions have their own ideas of a fun time.
1286: # Based on law library research by John Mackin,
1287: # who notes:
1288: # In Australia, time is not legislated federally, but rather by the
1289: # individual states. Thus, while such terms as "Eastern Standard Time"
1290: # [I mean, of course, Australian EST, not any other kind] are in common
1291: # use, _they have NO REAL MEANING_, as they are not defined in the
1292: # legislation. This is very important to understand.
1293: # I have researched New South Wales time only...
1294:
1295: # From Eric Ulevik (1999-05-26):
1296: # DST will start in NSW on the last Sunday of August, rather than the usual
1.1.1.1.4.1 snj 1297: # October in 2000. See: Matthew Moore,
1298: # Two months more daylight saving, Sydney Morning Herald (1999-05-26).
1299: # http://www.smh.com.au/news/9905/26/pageone/pageone4.html
1.1 apb 1300:
1301: # From Paul Eggert (1999-09-27):
1302: # See the following official NSW source:
1303: # Daylight Saving in New South Wales.
1.1.1.1.4.1 snj 1304: # http://dir.gis.nsw.gov.au/cgi-bin/genobject/document/other/daylightsaving/tigGmZ
1.1 apb 1305: #
1306: # Narrabri Shire (NSW) council has announced it will ignore the extension of
1307: # daylight saving next year. See:
1308: # Narrabri Council to ignore daylight saving
1.1.1.1.4.1 snj 1309: # http://abc.net.au/news/regionals/neweng/monthly/regeng-22jul1999-1.htm
1.1 apb 1310: # (1999-07-22). For now, we'll wait to see if this really happens.
1311: #
1.1.1.1.4.7! snj 1312: # Victoria will follow NSW. See:
1.1 apb 1313: # Vic to extend daylight saving (1999-07-28)
1.1.1.1.4.1 snj 1314: # http://abc.net.au/local/news/olympics/1999/07/item19990728112314_1.htm
1.1 apb 1315: #
1316: # However, South Australia rejected the DST request. See:
1317: # South Australia rejects Olympics daylight savings request (1999-07-19)
1.1.1.1.4.1 snj 1318: # http://abc.net.au/news/olympics/1999/07/item19990719151754_1.htm
1.1 apb 1319: #
1320: # Queensland also will not observe DST for the Olympics. See:
1321: # Qld says no to daylight savings for Olympics
1.1.1.1.4.1 snj 1322: # http://abc.net.au/news/olympics/1999/06/item19990601114608_1.htm
1.1 apb 1323: # (1999-06-01), which quotes Queensland Premier Peter Beattie as saying
1324: # "Look you've got to remember in my family when this came up last time
1325: # I voted for it, my wife voted against it and she said to me it's all very
1326: # well for you, you don't have to worry about getting the children out of
1327: # bed, getting them to school, getting them to sleep at night.
1328: # I've been through all this argument domestically...my wife rules."
1329: #
1330: # Broken Hill will stick with South Australian time in 2000. See:
1331: # Broken Hill to be behind the times (1999-07-21)
1.1.1.1.4.1 snj 1332: # http://abc.net.au/news/regionals/brokenh/monthly/regbrok-21jul1999-6.htm
1.1 apb 1333:
1334: # IATA SSIM (1998-09) says that the spring 2000 change for Australian
1335: # Capital Territory, New South Wales except Lord Howe Island and Broken
1336: # Hill, and Victoria will be August 27, presumably due to the Sydney Olympics.
1337:
1338: # From Eric Ulevik, referring to Sydney's Sun Herald (2000-08-13), page 29:
1339: # The Queensland Premier Peter Beattie is encouraging northern NSW
1340: # towns to use Queensland time.
1341:
1342: # From Paul Eggert (2007-07-23):
1343: # See "southeast Australia" above for 2008 and later.
1344:
1345: # Yancowinna
1346:
1347: # From John Mackin (1989-01-04):
1348: # 'Broken Hill' means the County of Yancowinna.
1349:
1350: # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1351: # # YANCOWINNA.. [ Confirmation courtesy of Broken Hill Postmaster ]
1352: # # [ Dec 1990 ]
1353: # ...
1354: # # Yancowinna uses Central Standard Time, despite [its] location on the
1355: # # New South Wales side of the S.A. border. Most business and social dealings
1356: # # are with CST zones, therefore CST is legislated by local government
1357: # # although the switch to Summer Time occurs in line with N.S.W. There have
1358: # # been years when this did not apply, but the historical data is not
1359: # # presently available.
1360: # Zone Australia/Yancowinna 9:30 AY %sST
1361: # ...
1362: # Rule AY 1971 1985 - Oct lastSun 2:00 1:00 D
1363: # Rule AY 1972 only - Feb lastSun 3:00 0 C
1364: # [followed by other Rules]
1365:
1366: # Lord Howe Island
1367:
1368: # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1369: # LHI... [ Courtesy of Pauline Van Winsen ]
1370: # [ Dec 1990 ]
1371: # Lord Howe Island is located off the New South Wales coast, and is half an
1372: # hour ahead of NSW time.
1373:
1374: # From James Lonergan, Secretary, Lord Howe Island Board (2000-01-27):
1375: # Lord Howe Island summer time in 2000/2001 will commence on the same
1376: # date as the rest of NSW (i.e. 2000-08-27). For your information the
1377: # Lord Howe Island Board (controlling authority for the Island) is
1378: # seeking the community's views on various options for summer time
1379: # arrangements on the Island, e.g. advance clocks by 1 full hour
1380: # instead of only 30 minutes. [Dependent] on the wishes of residents
1381: # the Board may approach the NSW government to change the existing
1382: # arrangements. The starting date for summer time on the Island will
1383: # however always coincide with the rest of NSW.
1384:
1385: # From James Lonergan, Secretary, Lord Howe Island Board (2000-10-25):
1386: # Lord Howe Island advances clocks by 30 minutes during DST in NSW and retards
1387: # clocks by 30 minutes when DST finishes. Since DST was most recently
1388: # introduced in NSW, the "changeover" time on the Island has been 02:00 as
1389: # shown on clocks on LHI. I guess this means that for 30 minutes at the start
1390: # of DST, LHI is actually 1 hour ahead of the rest of NSW.
1391:
1392: # From Paul Eggert (2006-03-22):
1393: # For Lord Howe dates we use Shanks & Pottenger through 1989, and
1394: # Lonergan thereafter. For times we use Lonergan.
1395:
1396: # From Paul Eggert (2007-07-23):
1397: # See "southeast Australia" above for 2008 and later.
1398:
1399: # From Steffen Thorsen (2009-04-28):
1400: # According to the official press release, South Australia's extended daylight
1401: # saving period will continue with the same rules as used during the 2008-2009
1402: # summer (southern hemisphere).
1403: #
1404: # From
1405: # http://www.safework.sa.gov.au/uploaded_files/DaylightDatesSet.pdf
1406: # The extended daylight saving period that South Australia has been trialling
1407: # for over the last year is now set to be ongoing.
1408: # Daylight saving will continue to start on the first Sunday in October each
1409: # year and finish on the first Sunday in April the following year.
1410: # Industrial Relations Minister, Paul Caica, says this provides South Australia
1411: # with a consistent half hour time difference with NSW, Victoria, Tasmania and
1412: # the ACT for all 52 weeks of the year...
1413: #
1414: # We have a wrap-up here:
1.1.1.1.4.7! snj 1415: # https://www.timeanddate.com/news/time/south-australia-extends-dst.html
1.1 apb 1416: ###############################################################################
1417:
1418: # New Zealand
1419:
1420: # From Mark Davies (1990-10-03):
1421: # the 1989/90 year was a trial of an extended "daylight saving" period.
1422: # This trial was deemed successful and the extended period adopted for
1423: # subsequent years (with the addition of a further week at the start).
1424: # source - phone call to Ministry of Internal Affairs Head Office.
1425:
1426: # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1427: # # The Country of New Zealand (Australia's east island -) Gee they hate that!
1428: # # or is Australia the west island of N.Z.
1429: # # [ courtesy of Geoff Tribble.. Auckland N.Z. ]
1430: # # [ Nov 1990 ]
1431: # ...
1432: # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D
1433: # Rule NZ 1989 max - Oct Sun>=1 2:00 1:00 D
1434: # Rule NZ 1975 1989 - Mar Sun>=1 3:00 0 S
1435: # Rule NZ 1990 max - Mar lastSun 3:00 0 S
1436: # ...
1437: # Zone NZ 12:00 NZ NZ%sT # New Zealand
1438: # Zone NZ-CHAT 12:45 - NZ-CHAT # Chatham Island
1439:
1440: # From Arthur David Olson (1992-03-08):
1441: # The chosen rules use the Davies October 8 values for the start of DST in 1989
1442: # rather than the October 1 value.
1443:
1444: # From Paul Eggert (1995-12-19);
1445: # Shank & Pottenger report 2:00 for all autumn changes in Australia and NZ.
1446: # Robert Uzgalis writes that the New Zealand Daylight
1447: # Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard
1448: # time on both the first Sunday in October and the third Sunday in March.
1449: # As with Australia, we'll assume the tradition is 2:00s, not 2:00.
1450: #
1451: # From Paul Eggert (2006-03-22):
1452: # The Department of Internal Affairs (DIA) maintains a brief history,
1453: # as does Carol Squires; see tz-link.htm for the full references.
1454: # Use these sources in preference to Shanks & Pottenger.
1455: #
1456: # For Chatham, IATA SSIM (1991/1999) gives the NZ rules but with
1457: # transitions at 2:45 local standard time; this confirms that Chatham
1458: # is always exactly 45 minutes ahead of Auckland.
1459:
1460: # From Colin Sharples (2007-04-30):
1461: # DST will now start on the last Sunday in September, and end on the
1462: # first Sunday in April. The changes take effect this year, meaning
1463: # that DST will begin on 2007-09-30 2008-04-06.
1464: # http://www.dia.govt.nz/diawebsite.nsf/wpg_URL/Services-Daylight-Saving-Daylight-saving-to-be-extended
1465:
1466: # From Paul Eggert (2014-07-14):
1467: # Chatham Island time was formally standardized on 1957-01-01 by
1.1.1.1.4.1 snj 1468: # New Zealand's Standard Time Amendment Act 1956 (1956-10-26).
1.1.1.1.4.7! snj 1469: # https://www.austlii.edu.au/nz/legis/hist_act/staa19561956n100244.pdf
1.1 apb 1470: # According to Google Books snippet view, a speaker in the New Zealand
1471: # parliamentary debates in 1956 said "Clause 78 makes provision for standard
1472: # time in the Chatham Islands. The time there is 45 minutes in advance of New
1473: # Zealand time. I understand that is the time they keep locally, anyhow."
1474: # For now, assume this practice goes back to the introduction of standard time
1475: # in New Zealand, as this would make Chatham Islands time almost exactly match
1.1.1.1.4.5 snj 1476: # LMT back when New Zealand was at UT +11:30; also, assume Chatham Islands did
1.1 apb 1477: # not observe New Zealand's prewar DST.
1478:
1479: ###############################################################################
1480:
1481:
1482: # Fiji
1483:
1484: # Howse writes (p 153) that in 1879 the British governor of Fiji
1485: # enacted an ordinance standardizing the islands on Antipodean Time
1486: # instead of the American system (which was one day behind).
1487:
1488: # From Rives McDow (1998-10-08):
1489: # Fiji will introduce DST effective 0200 local time, 1998-11-01
1490: # until 0300 local time 1999-02-28. Each year the DST period will
1491: # be from the first Sunday in November until the last Sunday in February.
1492:
1493: # From Paul Eggert (2000-01-08):
1494: # IATA SSIM (1999-09) says DST ends 0100 local time. Go with McDow.
1495:
1496: # From the BBC World Service in
1497: # http://news.bbc.co.uk/2/hi/asia-pacific/205226.stm (1998-10-31 16:03 UTC):
1498: # The Fijian government says the main reasons for the time change is to
1499: # improve productivity and reduce road accidents.... [T]he move is also
1500: # intended to boost Fiji's ability to attract tourists to witness the dawning
1501: # of the new millennium.
1502:
1503: # http://www.fiji.gov.fj/press/2000_09/2000_09_13-05.shtml (2000-09-13)
1504: # reports that Fiji has discontinued DST.
1505:
1506:
1507: # Kiribati
1508:
1509: # From Paul Eggert (1996-01-22):
1510: # Today's _Wall Street Journal_ (page 1) reports that Kiribati
1511: # "declared it the same day [throughout] the country as of Jan. 1, 1995"
1512: # as part of the competition to be first into the 21st century.
1513:
1514:
1515: # Kwajalein
1516:
1517: # In comp.risks 14.87 (26 August 1993), Peter Neumann writes:
1518: # I wonder what happened in Kwajalein, where there was NO Friday,
1519: # 1993-08-20. Thursday night at midnight Kwajalein switched sides with
1520: # respect to the International Date Line, to rejoin its fellow islands,
1521: # going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink.
1522:
1523:
1524: # N Mariana Is, Guam
1525:
1526: # Howse writes (p 153) "The Spaniards, on the other hand, reached the
1527: # Philippines and the Ladrones from America," and implies that the Ladrones
1528: # (now called the Marianas) kept American date for quite some time.
1529: # For now, we assume the Ladrones switched at the same time as the Philippines;
1530: # see Asia/Manila.
1531:
1.1.1.1.4.5 snj 1532: # US Public Law 106-564 (2000-12-23) made UT +10 the official standard time,
1.1 apb 1533: # under the name "Chamorro Standard Time". There is no official abbreviation,
1534: # but Congressman Robert A. Underwood, author of the bill that became law,
1535: # wrote in a press release (2000-12-27) that he will seek the use of "ChST".
1536:
1537:
1538: # Micronesia
1539:
1540: # Alan Eugene Davis writes (1996-03-16),
1541: # "I am certain, having lived there for the past decade, that 'Truk'
1542: # (now properly known as Chuuk) ... is in the time zone GMT+10."
1543: #
1.1.1.1.4.5 snj 1544: # Shanks & Pottenger write that Truk switched from UT +10 to +11
1.1 apb 1545: # on 1978-10-01; ignore this for now.
1546:
1547: # From Paul Eggert (1999-10-29):
1548: # The Federated States of Micronesia Visitors Board writes in
1549: # The Federated States of Micronesia - Visitor Information (1999-01-26)
1.1.1.1.4.1 snj 1550: # http://www.fsmgov.org/info/clocks.html
1.1.1.1.4.5 snj 1551: # that Truk and Yap are UT +10, and Ponape and Kosrae are +11.
1552: # We don't know when Kosrae switched from +12; assume January 1 for now.
1.1 apb 1553:
1554:
1555: # Midway
1556:
1557: # From Charles T O'Connor, KMTH DJ (1956),
1558: # quoted in the KTMH section of the Radio Heritage Collection
1559: # <http://radiodx.com/spdxr/KMTH.htm> (2002-12-31):
1560: # For the past two months we've been on what is known as Daylight
1561: # Saving Time. This time has put us on air at 5am in the morning,
1562: # your time down there in New Zealand. Starting September 2, 1956
1563: # we'll again go back to Standard Time. This'll mean that we'll go to
1564: # air at 6am your time.
1565: #
1566: # From Paul Eggert (2003-03-23):
1567: # We don't know the date of that quote, but we'll guess they
1568: # started DST on June 3. Possibly DST was observed other years
1569: # in Midway, but we have no record of it.
1570:
1.1.1.1.4.4 snj 1571: # Norfolk
1572:
1573: # From Alexander Krivenyshev (2015-09-23):
1574: # Norfolk Island will change ... from +1130 to +1100:
1575: # https://www.comlaw.gov.au/Details/F2015L01483/Explanatory%20Statement/Text
1576: # ... at 12.30 am (by legal time in New South Wales) on 4 October 2015.
1577: # http://www.norfolkisland.gov.nf/nia/MediaRelease/Media%20Release%20Norfolk%20Island%20Standard%20Time%20Change.pdf
1578:
1579: # From Paul Eggert (2015-09-23):
1580: # Transitions before 2015 are from timeanddate.com, which consulted
1581: # the Norfolk Island Museum and the Australian Bureau of Meteorology's
1582: # Norfolk Island station, and found no record of Norfolk observing DST
1583: # other than in 1974/5. See:
1.1.1.1.4.7! snj 1584: # https://www.timeanddate.com/time/australia/norfolk-island.html
1.1 apb 1585:
1586: # Pitcairn
1587:
1588: # From Rives McDow (1999-11-08):
1589: # A Proclamation was signed by the Governor of Pitcairn on the 27th March 1998
1590: # with regard to Pitcairn Standard Time. The Proclamation is as follows.
1591: #
1592: # The local time for general purposes in the Islands shall be
1593: # Co-ordinated Universal time minus 8 hours and shall be known
1594: # as Pitcairn Standard Time.
1595: #
1596: # ... I have also seen Pitcairn listed as UTC minus 9 hours in several
1597: # references, and can only assume that this was an error in interpretation
1598: # somehow in light of this proclamation.
1599:
1600: # From Rives McDow (1999-11-09):
1601: # The Proclamation regarding Pitcairn time came into effect on 27 April 1998
1602: # ... at midnight.
1603:
1604: # From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave:
1605: # Betty Christian told me yesterday that their local time is the same as
1606: # Pacific Standard Time. They used to be 1/2 hour different from us here in
1607: # Sacramento but it was changed a couple of years ago.
1608:
1609:
1610: # (Western) Samoa and American Samoa
1611:
1.1.1.1.4.7! snj 1612: # Howse writes (p 153) that after the 1879 standardization on Antipodean
! 1613: # time by the British governor of Fiji, the King of Samoa decided to change
1.1 apb 1614: # "the date in his kingdom from the Antipodean to the American system,
1615: # ordaining - by a masterpiece of diplomatic flattery - that
1616: # the Fourth of July should be celebrated twice in that year."
1.1.1.1.4.7! snj 1617: # This happened in 1892, according to the Evening News (Sydney) of 1892-07-20.
! 1618: # https://www.staff.science.uu.nl/~gent0113/idl/idl.htm
1.1 apb 1619:
1.1.1.1.4.5 snj 1620: # Although Shanks & Pottenger says they both switched to UT -11:30
1621: # in 1911, and to -11 in 1950. many earlier sources give -11
1.1 apb 1622: # for American Samoa, e.g., the US National Bureau of Standards
1623: # circular "Standard Time Throughout the World", 1932.
1.1.1.1.4.5 snj 1624: # Assume American Samoa switched to -11 in 1911, not 1950,
1.1 apb 1625: # and that after 1950 they agreed until (western) Samoa skipped a
1626: # day in 2011. Assume also that the Samoas follow the US and New
1627: # Zealand's "ST"/"DT" style of daylight-saving abbreviations.
1628:
1.1.1.1.4.7! snj 1629:
1.1 apb 1630: # Tonga
1631:
1632: # From Paul Eggert (1996-01-22):
1633: # Today's _Wall Street Journal_ (p 1) reports that "Tonga has been plotting
1634: # to sneak ahead of [New Zealanders] by introducing daylight-saving time."
1635: # Since Kiribati has moved the Date Line it's not clear what Tonga will do.
1636:
1637: # Don Mundell writes in the 1997-02-20 Tonga Chronicle
1.1.1.1.4.1 snj 1638: # How Tonga became 'The Land where Time Begins':
1639: # http://www.tongatapu.net.to/tonga/homeland/timebegins.htm
1640: #
1.1 apb 1641: # Until 1941 Tonga maintained a standard time 50 minutes ahead of NZST
1642: # 12 hours and 20 minutes ahead of GMT. When New Zealand adjusted its
1643: # standard time in 1940s, Tonga had the choice of subtracting from its
1644: # local time to come on the same standard time as New Zealand or of
1645: # advancing its time to maintain the differential of 13 degrees
1646: # (approximately 50 minutes ahead of New Zealand time).
1647: #
1648: # Because His Majesty King Tāufaʻāhau Tupou IV, then Crown Prince
1649: # Tungī, preferred to ensure Tonga's title as the land where time
1650: # begins, the Legislative Assembly approved the latter change.
1651: #
1652: # But some of the older, more conservative members from the outer
1653: # islands objected. "If at midnight on Dec. 31, we move ahead 40
1654: # minutes, as your Royal Highness wishes, what becomes of the 40
1655: # minutes we have lost?"
1656: #
1657: # The Crown Prince, presented an unanswerable argument: "Remember that
1658: # on the World Day of Prayer, you would be the first people on Earth
1659: # to say your prayers in the morning."
1660:
1661: # From Paul Eggert (2006-03-22):
1662: # Shanks & Pottenger say the transition was on 1968-10-01; go with Mundell.
1663:
1664: # From Eric Ulevik (1999-05-03):
1665: # Tonga's director of tourism, who is also secretary of the National Millennium
1666: # Committee, has a plan to get Tonga back in front.
1667: # He has proposed a one-off move to tropical daylight saving for Tonga from
1668: # October to March, which has won approval in principle from the Tongan
1669: # Government.
1670:
1671: # From Steffen Thorsen (1999-09-09):
1672: # * Tonga will introduce DST in November
1673: #
1674: # I was given this link by John Letts:
1675: # http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm
1676: #
1677: # I have not been able to find exact dates for the transition in November
1678: # yet. By reading this article it seems like Fiji will be 14 hours ahead
1679: # of UTC as well, but as far as I know Fiji will only be 13 hours ahead
1680: # (12 + 1 hour DST).
1681:
1682: # From Arthur David Olson (1999-09-20):
1683: # According to <http://www.tongaonline.com/news/sept1799.html>:
1684: # "Daylight Savings Time will take effect on Oct. 2 through April 15, 2000
1685: # and annually thereafter from the first Saturday in October through the
1686: # third Saturday of April. Under the system approved by Privy Council on
1687: # Sept. 10, clocks must be turned ahead one hour on the opening day and
1688: # set back an hour on the closing date."
1689: # Alas, no indication of the time of day.
1690:
1691: # From Rives McDow (1999-10-06):
1692: # Tonga started its Daylight Saving on Saturday morning October 2nd at 0200am.
1693: # Daylight Saving ends on April 16 at 0300am which is Sunday morning.
1694:
1695: # From Steffen Thorsen (2000-10-31):
1696: # Back in March I found a notice on the website http://www.tongaonline.com
1697: # that Tonga changed back to standard time one month early, on March 19
1698: # instead of the original reported date April 16. Unfortunately, the article
1699: # is no longer available on the site, and I did not make a copy of the
1700: # text, and I have forgotten to report it here.
1701: # (Original URL was <http://www.tongaonline.com/news/march162000.htm>)
1702:
1703: # From Rives McDow (2000-12-01):
1704: # Tonga is observing DST as of 2000-11-04 and will stop on 2001-01-27.
1705:
1706: # From Sione Moala-Mafi (2001-09-20) via Rives McDow:
1707: # At 2:00am on the first Sunday of November, the standard time in the Kingdom
1708: # shall be moved forward by one hour to 3:00am. At 2:00am on the last Sunday
1709: # of January the standard time in the Kingdom shall be moved backward by one
1710: # hour to 1:00am.
1711:
1.1.1.1.4.5 snj 1712: # From Pulu ʻAnau (2002-11-05):
1.1 apb 1713: # The law was for 3 years, supposedly to get renewed. It wasn't.
1714:
1.1.1.1.4.5 snj 1715: # From Pulu ʻAnau (2016-10-27):
1716: # http://mic.gov.to/news-today/press-releases/6375-daylight-saving-set-to-run-from-6-november-2016-to-15-january-2017
1717: # Cannot find anyone who knows the rules, has seen the duration or has seen
1718: # the cabinet decision, but it appears we are following Fiji's rule set.
1719: #
1720: # From Tim Parenti (2016-10-26):
1721: # Assume Tonga will observe DST from the first Sunday in November at 02:00
1722: # through the third Sunday in January at 03:00, like Fiji, for now.
1.1 apb 1723:
1.1.1.1.4.7! snj 1724: # From David Wade (2017-10-18):
! 1725: # In August government was disolved by the King. The current prime minister
! 1726: # continued in office in care taker mode. It is easy to see that few
! 1727: # decisions will be made until elections 16th November.
! 1728: #
! 1729: # From Paul Eggert (2017-10-18):
! 1730: # For now, guess that DST is discontinued. That's what the IATA is guessing.
! 1731:
! 1732:
1.1 apb 1733: # Wake
1734:
1735: # From Vernice Anderson, Personal Secretary to Philip Jessup,
1736: # US Ambassador At Large (oral history interview, 1971-02-02):
1737: #
1738: # Saturday, the 14th [of October, 1950] - ... The time was all the
1739: # more confusing at that point, because we had crossed the
1740: # International Date Line, thus getting two Sundays. Furthermore, we
1741: # discovered that Wake Island had two hours of daylight saving time
1742: # making calculation of time in Washington difficult if not almost
1743: # impossible.
1744: #
1.1.1.1.4.7! snj 1745: # https://www.trumanlibrary.org/oralhist/andrsonv.htm
1.1 apb 1746:
1747: # From Paul Eggert (2003-03-23):
1748: # We have no other report of DST in Wake Island, so omit this info for now.
1749:
1750: ###############################################################################
1751:
1752: # The International Date Line
1753:
1754: # From Gwillim Law (2000-01-03):
1755: #
1756: # The International Date Line is not defined by any international standard,
1757: # convention, or treaty. Mapmakers are free to draw it as they please.
1758: # Reputable mapmakers will simply ensure that every point of land appears on
1759: # the correct side of the IDL, according to the date legally observed there.
1760: #
1761: # When Kiribati adopted a uniform date in 1995, thereby moving the Phoenix and
1762: # Line Islands to the west side of the IDL (or, if you prefer, moving the IDL
1763: # to the east side of the Phoenix and Line Islands), I suppose that most
1764: # mapmakers redrew the IDL following the boundary of Kiribati. Even that line
1765: # has a rather arbitrary nature. The straight-line boundaries between Pacific
1766: # island nations that are shown on many maps are based on an international
1767: # convention, but are not legally binding national borders.... The date is
1768: # governed by the IDL; therefore, even on the high seas, there may be some
1769: # places as late as fourteen hours later than UTC. And, since the IDL is not
1770: # an international standard, there are some places on the high seas where the
1771: # correct date is ambiguous.
1772:
1.1.1.1.4.7! snj 1773: # From Wikipedia <https://en.wikipedia.org/wiki/Time_zone> (2005-08-31):
1.1 apb 1774: # Before 1920, all ships kept local apparent time on the high seas by setting
1775: # their clocks at night or at the morning sight so that, given the ship's
1776: # speed and direction, it would be 12 o'clock when the Sun crossed the ship's
1777: # meridian (12 o'clock = local apparent noon). During 1917, at the
1778: # Anglo-French Conference on Time-keeping at Sea, it was recommended that all
1779: # ships, both military and civilian, should adopt hourly standard time zones
1780: # on the high seas. Whenever a ship was within the territorial waters of any
1781: # nation it would use that nation's standard time. The captain was permitted
1782: # to change his ship's clocks at a time of his choice following his ship's
1783: # entry into another zone time - he often chose midnight. These zones were
1784: # adopted by all major fleets between 1920 and 1925 but not by many
1785: # independent merchant ships until World War II.
1786:
1787: # From Paul Eggert, using references suggested by Oscar van Vlijmen
1788: # (2005-03-20):
1789: #
1790: # The American Practical Navigator (2002)
1.1.1.1.4.1 snj 1791: # http://pollux.nss.nima.mil/pubs/pubs_j_apn_sections.html?rid=187
1.1 apb 1792: # talks only about the 180-degree meridian with respect to ships in
1793: # international waters; it ignores the international date line.
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