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Diff for /src/lib/libc/time/NEWS between version 1.28 and 1.29

version 1.28, 2019/04/04 18:18:31 version 1.29, 2019/07/03 15:50:16
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 News for the tz database  News for the tz database
   
 Release 20198 - 2019-03-25 22:01:33 -0700  Release 2019b - 2019-07-01 00:09:53 -0700
   
     Briefly:
       Brazil no longer observes DST.
       'zic -b slim' outputs smaller TZif files; please try it out.
       Palestine's 2019 spring-forward transition was on 03-29, not 03-30.
   
     Changes to future timestamps
   
       Brazil has canceled DST and will stay on standard time indefinitely.
       (Thanks to Steffen Thorsen, Marcus Diniz, and Daniel Soares de
       Oliveira.)
   
       Predictions for Morocco now go through 2087 instead of 2037, to
       work around a problem on newlib when using TZif files output by
       zic 2019a or earlier.  (Problem reported by David Gauchard.)
   
     Changes to past and future timestamps
   
       Palestine's 2019 spring transition was 03-29 at 00:00, not 03-30
       at 01:00.  (Thanks to Sharef Mustafa and Even Scharning.)  Guess
       future transitions to be March's last Friday at 00:00.
   
     Changes to past timestamps
   
       Hong Kong's 1941-06-15 spring-forward transition was at 03:00, not
       03:30.  Its 1945 transition from JST to HKT was on 11-18 at 02:00,
       not 09-15 at 00:00.  In 1946 its spring-forward transition was on
       04-21 at 00:00, not the previous day at 03:30.  From 1946 through
       1952 its fall-back transitions occurred at 04:30, not at 03:30.
       In 1947 its fall-back transition was on 11-30, not 12-30.
       (Thanks to P Chan.)
   
     Changes to past time zone abbreviations
   
       Italy's 1866 transition to Rome Mean Time was on December 12, not
       September 22.  This affects only the time zone abbreviation for
       Europe/Rome between those dates.  (Thanks to Stephen Trainor and
       Luigi Rosa.)
   
     Changes affecting metadata only
   
       Add info about the Crimea situation in zone1970.tab and zone.tab.
       (Problem reported by Serhii Demediuk.)
   
     Changes to code
   
       zic's new -b option supports a way to control data bloat and to
       test for year-2038 bugs in software that reads TZif files.
       'zic -b fat' and 'zic -b slim' generate larger and smaller output;
       for example, changing from fat to slim shrinks the Europe/London
       file from 3648 to 1599 bytes, saving about 56%.  Fat and slim
       files represent the same set of timestamps and use the same TZif
       format as documented in tzfile(5) and in Internet RFC 8536.
       Fat format attempts to work around bugs or incompatibilities in
       older software, notably software that mishandles 64-bit TZif data
       or uses obsolete TZ strings like "EET-2EEST" that lack DST rules.
       Slim format is more efficient and does not work around 64-bit bugs
       or obsolete TZ strings.  Currently zic defaults to fat format
       unless you compile with -DZIC_BLOAT_DEFAULT=\"slim\"; this
       out-of-the-box default is intended to change in future releases
       as the buggy software often mishandles timestamps anyway.
   
       zic no longer treats a set of rules ending in 2037 specially.
       Previously, zic assumed that such a ruleset meant that future
       timestamps could not be predicted, and therefore omitted a
       POSIX-like TZ string in the TZif output.  The old behavior is no
       longer needed for current tzdata, and caused problems with newlib
       when used with older tzdata (reported by David Gauchard).
   
       zic no longer generates some artifact transitions.  For example,
       Europe/London no longer has a no-op transition in January 1996.
   
     Changes to build procedure
   
       tzdata.zi now assumes zic 2017c or later.  This shrinks tzdata.zi
       by a percent or so.
   
     Changes to documentation and commentary
   
       The Makefile now documents the POSIXRULES macro as being obsolete,
       and similarly, zic's -p POSIXRULES option is now documented as
       being obsolete.  Although the POSIXRULES feature still exists and
       works as before, in practice it is rarely used for its intended
       purpose, and it does not work either in the default reference
       implementation (for timestamps after 2037) or in common
       implementations such as GNU/Linux (for contemporary timestamps).
       Since POSIXRULES was designed primarily as a temporary transition
       facility for System V platforms that died off decades ago, it is
       being decommissioned rather than institutionalized.
   
       New info on Bonin Islands and Marcus (thanks to Wakaba and Phake Nick).
   
   
   Release 2019a - 2019-03-25 22:01:33 -0700
   
   Briefly:    Briefly:
     Palestine "springs forward" on 2019-03-30 instead of 2019-03-23.      Palestine "springs forward" on 2019-03-30 instead of 2019-03-23.
Line 481  Release 2018d - 2018-03-22 07:05:46 -070
Line 575  Release 2018d - 2018-03-22 07:05:46 -070
     The code is a bit more portable to MS-Windows.  Installers can      The code is a bit more portable to MS-Windows.  Installers can
     compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that      compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that
     reserve identifiers like 'localtime'.  (Thanks to Manuela      reserve identifiers like 'localtime'.  (Thanks to Manuela
     Friedrich).      Friedrich.)
   
   Changes to documentation and commentary    Changes to documentation and commentary
   
Line 2276  Release 2014f - 2014-08-05 17:42:36 -070
Line 2370  Release 2014f - 2014-08-05 17:42:36 -070
     warlord Jin Shuren in the data.      warlord Jin Shuren in the data.
   
     Commentary about the coverage of each Russian zone has been standardized.      Commentary about the coverage of each Russian zone has been standardized.
     (Thanks to Tim Parenti).      (Thanks to Tim Parenti.)
   
     There is new commentary about contemporary timekeeping in Ethiopia.      There is new commentary about contemporary timekeeping in Ethiopia.
   
Line 2724  Release 2013e - 2013-09-19 23:50:04 -070
Line 2818  Release 2013e - 2013-09-19 23:50:04 -070
   
     Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.      Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
     This affects Europe/Zurich timestamps from 1853 to 1894.  (Thanks      This affects Europe/Zurich timestamps from 1853 to 1894.  (Thanks
     to Alois Treindl).      to Alois Treindl.)
   
     Change the date of the circa-1850 Zurich transition from 1849-09-12      Change the date of the circa-1850 Zurich transition from 1849-09-12
     to 1853-07-16, overriding Shanks with data from Messerli about      to 1853-07-16, overriding Shanks with data from Messerli about
Line 3034  Release 2013a - 2013-02-27 09:20:35 -080
Line 3128  Release 2013a - 2013-02-27 09:20:35 -080
     (Thanks to Arthur David Olson.)      (Thanks to Arthur David Olson.)
   
     Improve the commentary about which districts observe what times      Improve the commentary about which districts observe what times
     in Russia.  (Thanks to Oscar van Vlijmen and Arthur David Olson).      in Russia.  (Thanks to Oscar van Vlijmen and Arthur David Olson.)
   
     Add web page links to tz.js.      Add web page links to tz.js.
   
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  Added in v.1.29
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