1 News for the tz database
3 Release 2014e - 2014-06-12 21:53:52 -0700
5 Changes affecting near-future time stamps
7 Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00.
8 (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily
9 switch to standard time at 24:00 the last Thursday before Ramadan, and
10 back to DST at 00:00 the first Friday after Ramadan.
12 Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks
13 to Milamber Space Network.) Guess that from 2015 on Morocco will
14 temporarily switch to standard time at 03:00 the last Saturday before
15 Ramadan, and back to DST at 02:00 the first Saturday after Ramadan.
17 Changes affecting past time stamps
19 The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of
20 "MSD" for Moscow's double daylight time in summer 1921. Also, a typo
21 "VLASST" has been repaired to be "VLAST" for Vladivostok summer time
22 in 1991. (Thanks to Hank W. for reporting the problems.)
24 Changes affecting commentary
26 tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the
27 draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and
28 removes stale pointers to World Time Explorer and WORLDTIME.
31 Release 2014d - 2014-05-27 21:34:40 -0700
33 Changes affecting code
35 zic no longer generates files containing time stamps before the Big Bang.
36 This works around GNOME bug 730332
37 <https://bugzilla.gnome.org/show_bug.cgi?id=730332>.
38 (Thanks to Leonardo Chiquitto for reporting the bug, and to
39 Arthur David Olson and James Cloos for suggesting improvements to the fix.)
41 Changes affecting documentation
43 tz-link.htm now mentions GNOME.
46 Release 2014c - 2014-05-13 07:44:13 -0700
48 Changes affecting near-future time stamps
50 Egypt observes DST starting 2014-05-15 at 24:00.
51 (Thanks to Ahmad El-Dardiry and Gunther Vermier.)
52 Details have not been announced, except that DST will not be observed
53 during Ramadan. Guess that DST will stop during the same Ramadan dates as
54 Morocco, and that Egypt's future spring and fall transitions will be the
55 same as 2010 when it last observed DST, namely April's last Friday at
56 00:00 to September's last Thursday at 23:00 standard time. Also, guess
57 that Ramadan transitions will be at 00:00 standard time.
59 Changes affecting code
61 zic now generates transitions for minimum time values, eliminating guesswork
62 when handling low-valued time stamps. (Thanks to Arthur David Olson.)
64 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.)
66 Changes affecting commentary and documentation
68 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.)
71 Release 2014b - 2014-03-24 21:28:50 -0700
73 Changes affecting near-future time stamps
75 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time.
76 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU.
78 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and
79 Bengt-Inge Larsson.) This is currently an approximation; a better version
80 will require the zic and localtime fixes mentioned below, and the plan is
81 to wait for a while until at least the zic fixes propagate.
83 Changes affecting code
85 'zic' and 'localtime' no longer reject locations needing four transitions
86 per year for the forseeable future. (Thanks to Andrew Main (Zefram).)
87 Also, 'zic' avoids some unlikely failures due to integer overflow.
89 Changes affecting build procedure
91 'make check' now detects Rule lines defined but never used.
92 The NZAQ rules, an instance of this problem, have been removed.
94 Changes affecting commentary and documentation
96 Fix Tuesday/Thursday typo in description of time in Israel.
97 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.)
99 Microsoft Windows 8.1 doesn't support tz database names. (Thanks
100 to Donald MacQueen.) Instead, the Microsoft Windows Store app
101 library supports them.
103 Add comments about Johnston Island time in the 1960s.
104 (Thanks to Lyle McElhaney.)
106 Morocco's 2014 DST start will be as predicted.
107 (Thanks to Sebastien Willemijns.)
110 Release 2014a - 2014-03-07 23:30:29 -0800
112 Changes affecting near-future time stamps
114 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for
115 the heads-up, and to Tim Parenti for simplifying the update.)
117 Changes affecting past time stamps
119 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00.
120 (Thanks to Steffen Thorsen.)
122 Ukraine switched from Moscow to Eastern European time on 1990-07-01
123 (not 1992-01-01), and observed DST during the entire next winter.
124 (Thanks to Vladimir in Moscow via Alois Treindl.)
126 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03.
127 (Thanks to Avigdor Finkelstein.)
129 Changes affecting code
131 A uninitialized-storage bug in 'localtime' has been fixed.
132 (Thanks to Logan Chien.)
134 Changes affecting the build procedure
136 The settings for 'make check_web' now default to Ubuntu 13.10.
138 Changes affecting commentary and documentation
140 The boundary of the US Pacific time zone is given more accurately.
141 (Thanks to Alan Mintz.)
143 Chile's 2014 DST will be as predicted. (Thanks to Jose Miguel Garrido.)
145 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Raul Perasso.)
147 Better descriptions of countries with same time zone history as
148 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.)
150 Several changes affect tz-link.htm, the main web page.
152 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to
155 Mention xCal (Internet RFC 6321) and jCal.
157 Microsoft has some support for tz database names.
159 CLDR data is available in both XML and JSON form.
161 Mention Maggiolo's map of solar vs standard time.
162 (Thanks to Arthur David Olson.)
164 Mention TZ4Net. (Thanks to Matt Johnson.)
166 Mention the timezone-olson Haskell package.
168 Mention zeitverschiebung.net. (Thanks to Martin Jaeger.)
170 Remove moribund links to daylight-savings-time.info and to
171 Simple Timer + Clocks.
173 Update two links. (Thanks to Oscar van Vlijmen.)
175 Fix some formatting glitches, e.g., remove random newlines from
176 abbr elements' title attributes.
179 Release 2013i - 2013-12-17 07:25:23 -0800
181 Changes affecting near-future time stamps:
183 Jordan switches back to standard time at 00:00 on December 20, 2013.
184 The 2006-2011 transition schedule is planned to resume in 2014.
185 (Thanks to Steffen Thorsen.)
187 Changes affecting past time stamps:
189 In 2004, Cuba began DST on March 28, not April 4.
190 (Thanks to Steffen Thorsen.)
192 Changes affecting code
194 The compile-time flag NOSOLAR has been removed, as nowadays the
195 benefit of slightly shrinking runtime table size is outweighed by the
196 cost of disallowing potential future updates that exceed old limits.
198 Changes affecting documentation and commentary
200 The files solar87, solar88, and solar89 are no longer distributed.
201 They were a negative experiment -- that is, a demonstration that
202 tz data can represent solar time only with some difficulty and error.
203 Their presence in the distribution caused confusion, as Riyadh
204 civil time was generally not solar time in those years.
206 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.)
209 Release 2013h - 2013-10-25 15:32:32 -0700
211 Changes affecting current and future time stamps:
213 Libya has switched its time zone back to UTC+2 without DST,
214 instead of UTC+1 with DST. (Thanks to Even Scharning.)
216 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules.
217 (Thanks to Gwillim Law.)
219 Changes affecting future time stamps:
221 Acre and (we guess) western Amazonas will switch from UTC-4 to UTC-5
222 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe.
223 (Thanks to Steffen Thorsen.)
225 Add entries for DST transitions in Morocco in the year 2038.
226 This avoids some year-2038 glitches introduced in 2013g.
227 (Thanks to Yoshito Umaoka for reporting the problem.)
229 Changes affecting API
231 The 'tzselect' command no longer requires the 'select' command,
232 and should now work with /bin/sh on more platforms. It also works
233 around a bug in BusyBox awk before version 1.21.0. (Thanks to
234 Patrick 'P. J.' McDermott.)
236 Changes affecting code
238 Fix localtime overflow bugs with 32-bit unsigned time_t.
240 zdump no longer assumes sscanf returns maximal values on overflow.
242 Changes affecting the build procedure
244 The builder can specify which programs to use, if any, instead of
245 'ar' and 'ranlib', and libtz.a is now built locally before being
246 installed. (Thanks to Michael Forney.)
248 A dependency typo in the 'zdump' rule has been fixed.
249 (Thanks to Andrew Paprocki.)
251 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f'
252 work as specified by POSIX.2-1992 or later; this is portable nowadays.
254 'make clean' no longer removes 'leapseconds', since it's
255 host-independent and is part of the distribution.
257 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed.
259 Changes affecting documentation and commentary
261 tz-link.htm now mentions TC TIMEZONE's draft timezone service protocol
262 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle).
264 Update URLs in tz-link page. Add URLs for Microsoft Windows, since
265 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no
266 longer maintained) and for old advisories. SOFA now does C.
268 Release 2013g - 2013-09-30 21:08:26 -0700
270 Changes affecting current and near-future time stamps
272 Morocco now observes DST from the last Sunday in March to the last
273 Sunday in October, not April to September respectively. (Thanks
276 Changes affecting 'zic'
278 'zic' now runs on platforms that lack both hard links and symlinks.
279 (Thanks to Theo Veenker for reporting the problem, for MinGW.)
280 Also, fix some bugs on platforms that lack hard links but have symlinks.
282 'zic -v' again warns that Asia/Tehran has no POSIX environment variable
283 to predict the far future, fixing a bug introduced in 2013e.
285 Changes affecting the build procedure
287 The 'leapseconds' file is again put into the tzdata tarball.
288 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to
289 Matt Burgess and Ian Abbott.) The timestamps of these and other
290 dependent files in tarballs are adjusted more consistently.
292 Changes affecting documentation and commentary
294 The README file is now part of the data tarball as well as the code.
295 It now states that files are public domain unless otherwise specified.
296 (Thanks to Andrew Main (Zefram) for asking for clarifications.)
297 Its details about the 1989 release moved to a place of honor near
301 Release 2013f - 2013-09-24 23:37:36 -0700
303 Changes affecting near-future time stamps
305 Tocantins will very likely not observe DST starting this spring.
306 (Thanks to Steffen Thorsen.)
308 Jordan will likely stay at UTC+3 indefinitely, and will not fall
311 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.)
313 Changes affecting API
315 The types of the global variables 'timezone' and 'altzone' (if present)
316 have been changed back to 'long'. This is required for 'timezone'
317 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
318 These variables were originally 'long' in the tz code, but were
319 mistakenly changed to 'time_t' in 1987; nobody reported the
320 incompatibility until now. The difference matters on x32, where
321 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.)
323 Changes affecting the build procedure
325 Avoid long strings in leapseconds.awk to work around a mawk bug.
326 (Thanks to Cyril Baurand.)
328 Changes affecting documentation and commentary
330 New file 'NEWS' that contains release notes like this one.
332 Paraguay's law does not specify DST transition time; 00:00 is customary.
333 (Thanks to Waldemar Villamayor-Venialbo.)
335 Minor capitalization fixes.
337 Changes affecting version-control only
339 The experimental github repository now contains annotated and
340 signed tags for recent releases, e.g., '2013e' for Release 2013e.
341 Releases are tagged starting with 2012e; earlier releases were
342 done differently, and tags would either not have a simple name or
343 not exactly match what was released.
345 'make set-timestamps' is now simpler and a bit more portable.
348 Release 2013e - 2013-09-19 23:50:04 -0700
350 Changes affecting near-future time stamps
352 This year Fiji will start DST on October 27, not October 20.
353 (Thanks to David Wheeler for the heads-up.) For now, guess that
354 Fiji will continue to spring forward the Sunday before the fourth
357 Changes affecting current and future time zone abbreviations
359 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian
360 time zone abbreviations since 1932. (Thanks to George Ziegler,
361 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and
362 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura,
363 Asia/Makassar, and Asia/Pontianak.
365 Use ART (UTC-3, standard time), rather than WARST (also UTC-3, but
366 daylight saving time) for San Luis, Argentina since 2009.
368 Changes affecting Godthab time stamps after 2037 if version mismatch
370 Allow POSIX-like TZ strings where the transition time's hour can
371 range from -167 through 167, instead of the POSIX-required 0
372 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the
373 new Fiji rules. This is a more-compact way to represent
374 far-future time stamps for America/Godthab, America/Santiago,
375 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem,
376 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by
377 this change. (Derived from a suggestion by Arthur David Olson.)
379 Allow POSIX-like TZ strings where daylight saving time is in
380 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western
381 Argentina Summer Time all year. This supports a more-compact way
382 to represent the 2013d data for America/Argentina/San_Luis.
383 Because of the change for San Luis noted above this change does not
384 affect the current data. (Thanks to Andrew Main (Zefram) for
385 suggestions that improved this change.)
387 Where these two TZ changes take effect, there is a minor extension
388 to the tz file format in that it allows new values for the
389 embedded TZ-format string, and the tz file format version number
390 has therefore been increased from 2 to 3 as a precaution.
391 Version-2-based client code should continue to work as before for
392 all time stamps before 2038. Existing version-2-based client code
393 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format
394 files, and typically works in practice even for time stamps after
395 2037; the only known exception is America/Godthab.
397 Changes affecting time stamps before 1970
399 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects
400 some errors before 1947.
402 Some zones have been turned into links, when they differ from
403 existing zones only in older data that was likely invented or that
404 differs only in LMT or transition from LMT. These changes affect
405 only time stamps before 1943. The affected zones are:
406 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica,
407 America/Grenada, America/Guadeloupe, America/Marigot,
408 America/Montserrat, America/St_Barthelemy, America/St_Kitts,
409 America/St_Lucia, America/St_Thomas, America/St_Vincent,
410 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for
411 confirming that the old Europe/Vaduz zone was wrong and the new
412 link is better for WWII-era times.)
414 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects
415 America/Cayman, America/Jamaica and America/Grand_Turk time stamps
418 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
419 This affects Europe/Zurich time stamps from 1853 to 1894. (Thanks
422 Change the date of the circa-1850 Zurich transition from 1849-09-12
423 to 1853-07-16, overriding Shanks with data from Messerli about
424 postal and telegraph time in Switzerland.
426 Changes affecting time zone abbreviations before 1970
428 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932,
429 as Jakarta was called Batavia back then.
431 Changes affecting API
433 The 'zic' command now outputs a dummy transition when far-future
434 data can't be summarized using a TZ string, and uses a 402-year
435 window rather than a 400-year window. For the current data, this
436 affects only the Asia/Tehran file. It does not affect any of the
437 time stamps that this file represents, so zdump outputs the same
438 information as before. (Thanks to Andrew Main (Zefram).)
440 The 'date' command has a new '-r' option, which lets you specify
441 the integer time to display, a la FreeBSD.
443 The 'tzselect' command has two new options '-c' and '-n', which lets you
444 select a zone based on latitude and longitude.
446 The 'zic' command's '-v' option now warns about constructs that
447 require the new version-3 binary file format. (Thanks to Arthur
448 David Olson for the suggestion.)
450 Support for floating-point time_t has been removed.
451 It was always dicey, and POSIX no longer requires it.
452 (Thanks to Eric Blake for suggesting to the POSIX committee to
453 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
454 Heninger, Arthur David Olson, and Alois Treindl, for reporting
455 bugs and elucidating some of the corners of the old floating-point
458 The signatures of 'offtime', 'timeoff', and 'gtime' have been
459 changed back to the old practice of using 'long' to represent UT
460 offsets. This had been inadvertently and mistakenly changed to
461 'int_fast32_t'. (Thanks to Christos Zoulos.)
463 The code avoids undefined behavior on integer overflow in some
464 more places, including gmtime, localtime, mktime and zdump.
466 Changes affecting the zdump utility
468 zdump now outputs "UT" when referring to Universal Time, not "UTC".
469 "UTC" does not make sense for time stamps that predate the introduction
470 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen
471 for clarifying UT vs UTC.)
473 Data changes affecting behavior of tzselect and similar programs
475 Country code BQ is now called the more-common name "Caribbean Netherlands"
476 rather than the more-official "Bonaire, St Eustatius & Saba".
478 Remove from zone.tab the names America/Montreal, America/Shiprock,
479 and Antarctica/South_Pole, as they are equivalent to existing
480 same-country-code zones for post-1970 time stamps. The data for
481 these names are unchanged, so the names continue to work as before.
483 Changes affecting code internals
485 zic -c now runs way faster on 64-bit hosts when given large numbers.
487 zic now uses vfprintf to avoid allocating and freeing some memory.
489 tzselect now computes the list of continents from the data,
490 rather than have it hard-coded.
492 Minor changes pacify GCC 4.7.3 and GCC 4.8.1.
494 Changes affecting the build procedure
496 The 'leapseconds' file is now generated automatically from a
497 new file 'leap-seconds.list', which is a copy of
498 <ftp://time.nist.gov/pub/leap-seconds.list>.
499 A new source file 'leapseconds.awk' implements this.
500 The goal is simplification of the future maintenance of 'leapseconds'.
502 When building the 'posix' or 'right' subdirectories, if the
503 subdirectory would be a copy of the default subdirectory, it is
504 now made a symbolic link if that is supported. This saves about
505 2 MB of file system space.
507 The links America/Shiprock and Antarctica/South_Pole have been
508 moved to the 'backward' file. This affects only nondefault builds
509 that omit 'backward'.
511 Changes affecting version-control only
513 .gitignore now ignores 'date'.
515 Changes affecting documentation and commentary
517 Changes to the 'tzfile' man page
519 It now mentions that the binary file format may be extended in
520 future versions by appending data.
522 It now refers to the 'zdump' and 'zic' man pages.
524 Changes to the 'zic' man page
526 It lists conditions that elicit a warning with '-v'.
528 It says that the behavior is unspecified when duplicate names
529 are given, or if the source of one link is the target of another.
531 Its examples are updated to match the latest data.
533 The definition of white space has been clarified slightly.
534 (Thanks to Michael Deckers.)
536 Changes to the 'Theory' file
538 There is a new section about the accuracy of the tz database,
539 describing the many ways that errors can creep in, and
540 explaining why so many of the pre-1970 time stamps are wrong or
541 misleading (thanks to Steve Allen, Lester Caine, and Garrett
542 Wollman for discussions that contributed to this).
544 The 'Theory' file describes LMT better (this follows a
545 suggestion by Guy Harris).
547 It refers to the 2013 edition of POSIX rather than the 2004 edition.
549 It's mentioned that excluding 'backward' should not affect the
550 other data, and it suggests at least one zone.tab name per
551 inhabited country (thanks to Stephen Colebourne).
553 Some longstanding restrictions on names are documented, e.g.,
554 'America/New_York' precludes 'America/New_York/Bronx'.
556 It gives more reasons for the 1970 cutoff.
558 It now mentions which time_t variants are supported, such as
559 signed integer time_t. (Thanks to Paul Goyette for reporting
560 typos in an experimental version of this change.)
562 (Thanks to Philip Newton for correcting typos in these changes.)
564 Documentation and commentary is more careful to distinguish UT in
565 general from UTC in particular. (Thanks to Steve Allen.)
567 Add a better source for the Zurich 1894 transition.
568 (Thanks to Pierre-Yves Berger.)
570 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.)
573 Release 2013d - 2013-07-05 07:38:01 -0700
575 Changes affecting future time stamps:
577 Morocco's midsummer transitions this year are July 7 and August 10,
578 not July 9 and August 8. (Thanks to Andrew Paprocki.)
580 Israel now falls back on the last Sunday of October.
581 (Thanks to Ephraim Silverberg.)
583 Changes affecting past time stamps:
585 Specify Jerusalem's location more precisely; this changes the pre-1880
588 Changing affecting metadata only:
590 Fix typos in the entries for country codes BQ and SX.
592 Changes affecting code:
594 Rework the code to fix a bug with handling Australia/Macquarie on
595 32-bit hosts (thanks to Arthur David Olson).
597 Port to platforms like NetBSD, where time_t can be wider than long.
599 Add support for testing time_t types other than the system's.
600 Run 'make check_time_t_alternatives' to try this out.
601 Currently, the tests fail for unsigned time_t;
602 this should get fixed at some point.
604 Changes affecting documentation and commentary:
606 Deemphasize the significance of national borders.
608 Update the zdump man page.
610 Remove obsolete NOID comment (thanks to Denis Excoffier).
612 Update several URLs and comments in the web pages.
614 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler).
616 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka).
619 Release 2013c - 2013-04-19 16:17:40 -0700
621 Changes affecting current and future time stamps:
623 Palestine observed DST starting March 29, 2013. (Thanks to
624 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST,
625 with the predicted rules being the last Thursday in March at 24:00
626 to the first Friday on or after September 21 at 01:00.
628 Assume that the recent change to Paraguay's DST rules is permanent,
629 by moving the end of DST to the 4th Sunday in March every year.
630 (Thanks to Carlos Raul Perasso.)
632 Changes affecting past time stamps:
634 Fix some historical data for Palestine to agree with that of
635 timeanddate.com, as follows:
637 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not
640 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not
643 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27.
645 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2.
647 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01.
649 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00.
651 Fix times of habitation for Macquarie to agree with the Tasmania
652 Parks & Wildlife Service history, which indicates that permanent
653 habitation was 1899-1919 and 1948 on.
655 Changing affecting metadata only:
657 Macquarie Island is politically part of Australia, not Antarctica.
658 (Thanks to Tobias Conradi.)
660 Sort Macquarie more-consistently with other parts of Australia.
661 (Thanks to Tim Parenti.)
664 Release 2013b - 2013-03-10 22:33:40 -0700
666 Changes affecting current and future time stamps:
668 Haiti uses US daylight-saving rules this year, and presumably future years.
669 This changes time stamps starting today. (Thanks to Steffen Thorsen.)
671 Paraguay will end DST on March 24 this year.
672 (Thanks to Steffen Thorsen.) For now, assume it's just this year.
674 Morocco does not observe DST during Ramadan;
675 try to predict Ramadan in Morocco as best we can.
676 (Thanks to Erik Homoet for the heads-up.)
678 Changes affecting commentary:
680 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS.
681 Update URL for Solaris. Mention Internet RFC 6557.
682 Update Internet RFCs 2445->5545, 2822->5322.
683 Switch from FTP to HTTP for Internet RFCs.
686 Release 2013a - 2013-02-27 09:20:35 -0800
688 Change affecting binary data format:
690 The zone offset at the end of version-2-format zone files is now
691 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthor David Olson.)
693 Changes affecting current and future time stamps:
695 Chile's 2013 rules, and we guess rules for 2014 and later, will be
696 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC.
697 (Thanks to Steffen Thorsen and Robert Elz.)
699 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen.
700 (Thanks to Tobias Conradi and Arthur David Olson.)
702 Many changes affect historical time stamps before 1940.
703 These were deduced from: Milne J. Civil time. Geogr J. 1899
704 Feb;13(2):173-94 <http://www.jstor.org/stable/1774359>.
706 Changes affecting the code:
708 Fix zic bug that mishandled Egypt's 2010 changes (this also affected
709 the data). (Thanks to Arthur David Olson.)
711 Fix localtime bug when time_t is unsigned and data files were generated
712 by a signed time_t system. (Thanks to Doug Bailey for reporting and
713 to Arthur David Olson for fixing.)
715 Allow the email address for bug reports to be set by the packager.
716 The default is tz@iana.org, as before. (Thanks to Joseph S. Myers.)
718 Update HTML checking to be compatible with Ubuntu 12.10.
720 Check that files are a safe subset of ASCII. At some point we may
721 relax this requirement to a safe subset of UTF-8. Without the
722 check, some non-UTF-8 encodings were leaking into the distribution.
726 Restore a comment about copyright notices that was inadvertently deleted.
727 (Thanks to Arthur David Olson.)
729 Improve the commentary about which districts observe what times
730 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson).
732 Add web page links to tz.js.
734 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.)
737 Release 2012j - 2012-11-12 18:34:49 -0800
739 Libya moved to CET this weekend, but with DST planned next year.
740 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.)
742 Signatures now have the extension .asc, not .sign, as that's more
743 standard. (Thanks to Phil Pennock.)
745 The output of 'zdump --version', and of 'zic --version', now
746 uses a format that is more typical for --version.
747 (Thanks to Joseph S. Myers.)
749 The output of 'tzselect --help', 'zdump --help', and 'zic --help'
750 now uses tz@iana.org rather than the old elsie address.
752 zic -v now complains about abbreviations that are less than 3
753 or more than 6 characters, as per Posix. Formerly, it checked
754 for abbreviations that were more than 3.
756 'make public' no longer puts its temporary directory under /tmp,
757 and uses the just-built zic rather than the system zic.
759 Various fixes to documentation and commentary.
762 Release 2012i - 2012-11-03 12:57:09 -0700
764 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.)
766 Linker flags can now be specified via LDFLAGS.
767 AWK now defaults to 'awk', not 'nawk'.
768 The shell in tzselect now defaults to /bin/bash, but this can
769 be overridden by specifying KSHELL.
770 The main web page now mentions the unofficial github repository.
771 (Thanks to Mike Frysinger.)
773 Tarball signatures can now be built by running 'make signatures'.
774 There are also new makefile rules 'tarballs', 'check_public', and
775 separate makefile rules for each tarball and signature file.
776 A few makefile rules are now more portable to strict POSIX.
778 The main web page now lists the canonical IANA URL.
781 Release 2012h - 2012-10-26 22:49:10 -0700
783 Bahia no longer has DST. (Thanks to Kelley Cook.)
785 Tocantins has DST. (Thanks to Rodrigo Severo.)
787 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.)
789 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.)
793 More C modernization, except that at Arthur David Olson's suggestion
794 the instances of 'register' were kept.
797 Release 2012g - 2012-10-17 20:59:45 -0700
799 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.)
801 Palestine fall 2012. (Thanks to Steffen Thorsen.)
805 To attack the version-number problem, this release ships the file
806 'Makefile' (which contains the release number) in both the tzcode and
807 the tzdata tarballs. The two Makefiles are identical, and should be
808 identical in any matching pair of tarballs, so it shouldn't matter
809 which order you extract the tarballs. Perhaps we can come up with a
810 better version-number scheme at some point; this scheme does have the
811 virtue of not adding more files.
814 Release 2012f - 2012-09-12 23:17:03 -0700
816 * australasia (Pacific/Fiji): Fiji DST is October 21 through January
817 20 this year. (Thanks to Steffen Thorsen.)
820 Release 2012e - 2012-08-02 20:44:55 -0700
822 * australasia (Pacific/Fakaofo): Tokelau is UTC+13, not UTC+14.
823 (Thanks to Steffen Thorsen.)
825 * Use a single version number for both code and data.
827 * .gitignore: New file.
829 * Remove trailing white space.
832 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700
834 Changes for Morocco's time stamps, which take effect in a couple of
835 hours, along with infrastructure changes to accommodate how the tz
836 code and data are released on IANA.
839 Release data2012c - 2012-03-27 12:17:25 -0400
842 Summer time changes for Morocco (to start late April 2012)
845 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria
848 Haiti following US/Canada rules for 2012 (and we're assuming,
849 for now anyway, for the future).
852 Release 2012b - 2012-03-02 12:29:15 +0700
854 There is just one change to tzcode2012b (compared with 2012a):
855 the Makefile that was accidentally included with 2012a has been
856 replaced with the version that should have been there, which is
857 identical with the previous version (from tzcode2011i).
859 There are just two changes in tzdata2012b compared with 2012a.
861 Most significantly, summer time in Cuba has been delayed 3 weeks
862 (now starts April 1 rather than March 11). Since Mar 11 (the old start
863 date, as listed in 2012a) is just a little over a week away, this
866 Less importantly, an excess tab in one of the changes in zone.tab
867 in 2012a has been removed.
870 Release 2012a - 2012-03-01 18:28:10 +0700
872 The changes in tzcode2012a (compared to the previous version, 2011i)
873 are entirely to the README and tz-art.htm and tz-link.htm files, if
874 none of those concern you, you can ignore the code update. The changes
875 reflect the changed addresses for the mailing list and the code and
876 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile
877 has been added to tz-link.htm).
879 In tzdata2012a (compared to the previous release, which was 2011n)
880 the major changes are:
881 Chile 2011/2012 and 2012/2013 summer time date adjustments.
882 Falkland Islands onto permanent summer time (we're assuming for the
883 foreseeable future, though 2012 is all we're fairly certain of.)
884 Armenia has abolished Summer Time.
885 Tokelau jumped the International Date Line back last December
886 (just the same as their near neighbour, Samoa).
887 America/Creston is a new zone for a small area of British Columbia
888 There will be a leapsecond 2012-06-30 23:59:60 UTC.
890 Other minor changes are:
891 Corrections to 1918 Canadian summer time end dates.
892 Updated URL for UK timezone history (in comments)
893 A few typos in Le Corre's list of free French place names (comments)
896 Release data2011n - 2011-10-30 14:57:54 +0700
898 There are three changes of note - most urgently, Cuba (America/Havana)
899 has extended summer time by two weeks, now to end on Nov 13, rather than
900 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic
901 (Europe/Tiraspol) decided not to split from the rest of Moldova after
902 all, and consequently that zone has been removed (again) and reinstated
903 in the "backward" file as a link to Europe/Chisinau. And third, the
904 end date for Fiji's summer time this summer was moved forward from the
905 earlier planned Feb 26, to Jan 22.
907 Apart from that, Moldova (MD) returns to a single entry in zone.tab
908 (and the incorrect syntax that was in the 2011m version of that file
909 is so fixed - it would have been fixed in a different way had this
910 change not happened - that's the "missing" sccs version id).
913 Release data2011m - 2011-10-24 21:42:16 +0700
915 In particular, the typos in comments in the data (2011-11-17 should have
916 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that
917 Tim Parenti noted) have been fixed, and the change for Ukraine has been
918 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to
919 Tim Parenti, and also Denys Gavrysh)
921 In addition, I added Europe/Tiraspol to zone.tab.
923 This time, all the files have new version numbers... (including the files
924 otherwise unchanged in 2011m that were changed in 2011l but didn't get new
925 version numbers there...)
928 Release data2011l - 2011-10-10 11:15:43 +0700
930 There are just 2 changes that cause different generated tzdata files from
931 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil
932 is included, but commented out. Compared with the diff I sent out last week,
933 this version also includes attributions for the sources for the changes
934 (in much the same format as ado used, but the html tags have not been
935 checked, verified, or used in any way at all, so if there are errors there,
939 Release data2011k - 2011-09-20 17:54:03 -0400
944 Release data2011j - 2011-09-12 09:22:49 -0400
946 (contemporary changes for Samoa; past changes for Kenya, Uganda, and
947 Tanzania); there are also two spelling corrections to comments in
948 the australasia file (with thanks to Christos Zoulas).
951 Release 2011i - 2011-08-29 05:56:32 -0400
956 Release data2011h - 2011-06-15 18:41:48 -0400
958 Russia and Curacao changes
961 Release 2011g - 2011-04-25 09:07:22 -0400
963 update the rules for Egypt to reflect its abandonment of DST this year
966 Release 2011f - 2011-04-06 17:14:53 -0400
971 Release 2011e - 2011-03-31 16:04:38 -0400
973 Morocco, Chile, and tz-link changes
976 Release 2011d - 2011-03-14 09:18:01 -0400
978 changes that impact present-day time stamps in Cuba, Samoa, and Turkey
981 Release 2011c - 2011-03-07 09:30:09 -0500
983 These do affect current time stamps in Chile and Annette Island, Canada.
986 Release 2011b - 2011-02-07 08:44:50 -0500
991 Release 2011a - 2011-01-24 10:30:16 -0500
996 Release data2010o - 2010-11-01 09:18:23 -0400
998 change to the end of DST in Fiji in 2011
1001 Release 2010n - 2010-10-25 08:19:17 -0400
1006 Release 2010m - 2010-09-27 09:24:48 -0400
1008 Hong Kong, Vostok, and zic.c changes
1011 Release 2010l - 2010-08-16 06:57:25 -0400
1016 Release 2010k - 2010-07-26 10:42:27 -0400
1021 Release 2010j - 2010-05-10 09:07:48 -0400
1023 changes for Bahia de Banderas and for version naming
1026 Release data2010i - 2010-04-16 18:50:45 -0400
1028 the end of DST in Morocco on 2010-08-08
1031 Release data2010h - 2010-04-05 09:58:56 -0400
1036 Release data2010g - 2010-03-24 11:14:53 -0400
1041 Release 2010f - 2010-03-22 09:45:46 -0400
1046 Release data2010e - 2010-03-08 14:24:27 -0500
1048 corrects the Dhaka bug found by Danvin Ruangchan
1051 Release data2010d - 2010-03-06 07:26:01 -0500
1056 Release 2010c - 2010-03-01 09:20:58 -0500
1058 changes including KRE's suggestion for earlier initialization of
1059 "goahead" and "goback" structure elements
1062 Release code2010a - 2010-02-16 10:40:04 -0500
1067 Release data2010b - 2010-01-20 12:37:01 -0500
1072 Release data2010a - 2010-01-18 08:30:04 -0500
1077 Release data2009u - 2009-12-26 08:32:28 -0500
1079 changes to DST in Bangladesh
1082 Release 2009t - 2009-12-21 13:24:27 -0500
1087 Release data2009s - 2009-11-14 10:26:32 -0500
1089 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change
1092 Release 2009r - 2009-11-09 10:10:31 -0500
1094 "antarctica" and "tz-link.htm" changes
1097 Release 2009q - 2009-11-02 09:12:40 -0500
1099 with two corrections as reported by Eric Muller and Philip Newton
1102 Release data2009p - 2009-10-23 15:05:27 -0400
1104 Argentina (including San Luis) changes (with the correction from
1108 Release data2009o - 2009-10-14 16:49:38 -0400
1110 Samoa (commentary only), Pakistan, and Bangladesh changes
1113 Release data2009n - 2009-09-22 15:13:38 -0400
1115 added commentary for Argentina and a change to the end of DST in
1119 Release data2009m - 2009-09-03 10:23:43 -0400
1121 Samoa and Palestine changes
1124 Release data2009l - 2009-08-14 09:13:07 -0400
1126 Samao (comments only) and Egypt
1129 Release 2009k - 2009-07-20 09:46:08 -0400
1134 Release data2009j - 2009-06-15 06:43:59 -0400
1136 Bangladesh change (with a short turnaround since the DST change is
1140 Release 2009i - 2009-06-08 09:21:22 -0400
1142 updating for DST in Bangladesh this year
1145 Release 2009h - 2009-05-26 09:19:14 -0400
1150 Release data2009g - 2009-04-20 16:34:07 -0400
1155 Release data2009f - 2009-04-10 11:00:52 -0400
1157 correct DST in Pakistan
1160 Release 2009e - 2009-04-06 09:08:11 -0400
1165 Release 2009d - 2009-03-23 09:38:12 -0400
1167 Morocco, Tunisia, Argentina, and American Astronomical Society changes
1170 Release data2009c - 2009-03-16 09:47:51 -0400
1172 change to the start of Cuban DST
1175 Release 2009b - 2009-02-09 11:15:22 -0500
1180 Release 2009a - 2009-01-21 10:09:39 -0500
1185 Release data2008i - 2008-10-21 12:10:25 -0400
1187 southamerica and zone.tab files, with Argentina DST rule changes and
1188 United States zone reordering and recommenting
1191 Release 2008h - 2008-10-13 07:33:56 -0400
1196 Release 2008g - 2008-10-06 09:03:18 -0400
1198 Fix a broken HTML anchor and update Brazil's DST transitions;
1199 there's also a slight reordering of information in tz-art.htm.
1202 Release data2008f - 2008-09-09 22:33:26 -0400
1207 Release 2008e - 2008-07-28 14:11:17 -0400
1209 changes by Arthur David Olson and Jesper Norgaard Welen
1212 Release data2008d - 2008-07-07 09:51:38 -0400
1214 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo
1217 Release data2008c - 2008-05-19 17:48:03 -0400
1219 Pakistan, Morocco, and Mongolia
1222 Release data2008b - 2008-03-24 08:30:59 -0400
1224 including renaming Asia/Calcutta to Asia/Kolkata, with a backward
1228 Release 2008a - 2008-03-08 05:42:16 -0500
1233 Release 2007k - 2007-12-31 10:25:22 -0500
1235 most importantly, changes to the "southamerica" file based on
1236 Argentina's readoption of daylight saving time
1239 Release 2007j - 2007-12-03 09:51:01 -0500
1241 1. eliminate the "P" (parameter) macro;
1243 2. the "noncontroversial" changes circulated on the time zone
1244 mailing list (less the changes to "logwtmp.c");
1246 3. eliminate "too many transition" errors when "min" is used in time
1249 4. changes by Paul Eggert (including updated information for Venezuela).
1252 Release data2007i - 2007-10-30 10:28:11 -0400
1254 changes for Cuba and Syria
1257 Release 2007h - 2007-10-01 10:05:51 -0400
1259 changes by Paul Eggert, as well as an updated link to the ICU
1260 project in tz-link.htm
1263 Release 2007g - 2007-08-20 10:47:59 -0400
1265 changes by Paul Eggert
1267 The "leapseconds" file has been updated to incorporate the most
1268 recent International Earth Rotation and Reference Systems Service
1271 There's an addition to tz-art.htm regarding the television show "Medium".
1274 Release 2007f - 2007-05-07 10:46:46 -0400
1276 changes by Paul Eggert (including Haiti, Turks and Caicos, and New
1279 changes to zic.c to allow hour values greater than 24 (along with
1280 Paul's improved time value overflow checking)
1283 Release 2007e - 2007-04-02 10:11:52 -0400
1285 Syria and Honduras changes by Paul Eggert
1287 zic.c variable renaming changes by Arthur David Olson
1290 Release 2007d - 2007-03-20 08:48:30 -0400
1292 changes by Paul Eggert
1294 the elimination of white space at the ends of lines
1297 Release 2007c - 2007-02-26 09:09:37 -0500
1299 changes by Paul Eggert
1302 Release 2007b - 2007-02-12 09:34:20 -0500
1304 Paul Eggert's proposed change to the quotation handling logic in zic.c.
1306 changes to the commentary in "leapseconds" reflecting the IERS
1307 announcement that there is to be no positive leap second at the end
1311 Release 2007a - 2007-01-08 12:28:29 -0500
1313 changes by Paul Eggert
1315 Derick Rethan's Asmara change
1317 Oscar van Vlijmen's Easter Island local mean time change
1319 symbolic link changes
1322 Release 2006p - 2006-11-27 08:54:27 -0500
1324 changes by Paul Eggert
1327 Release 2006o - 2006-11-06 09:18:07 -0500
1329 changes by Paul Eggert
1332 Release 2006n - 2006-10-10 11:32:06 -0400
1334 changes by Paul Eggert
1337 Release 2006m - 2006-10-02 15:32:35 -0400
1339 changes for Uruguay, Palestine, and Egypt by Paul Eggert
1341 (minimalist) changes to zic.8 to clarify "until" information
1344 Release data2006l - 2006-09-18 12:58:11 -0400
1346 Paul's best-effort work on this coming weekend's Egypt time change
1349 Release 2006k - 2006-08-28 12:19:09 -0400
1351 changes by Paul Eggert
1354 Release 2006j - 2006-08-21 09:56:32 -0400
1356 changes by Paul Eggert
1359 Release code2006i - 2006-08-07 12:30:55 -0400
1363 Ken Pizzini's conversion script
1366 Release code2006h - 2006-07-24 09:19:37 -0400
1368 adds public domain notices to four files
1370 includes a fix for transition times being off by a second
1372 adds a new recording to the "arts" file (information courtesy Colin Bowern)
1375 Release 2006g - 2006-05-08 17:18:09 -0400
1377 northamerica changes by Paul Eggert
1380 Release 2006f - 2006-05-01 11:46:00 -0400
1382 a missing version number problem is fixed (with thanks to Bradley
1383 White for catching the problem)
1386 Release 2006d - 2006-04-17 14:33:43 -0400
1388 changes by Paul Eggert
1390 added new items to tz-arts.htm that were found by Paul
1393 Release 2006c - 2006-04-03 10:09:32 -0400
1395 two sets of data changes by Paul Eggert
1397 a fencepost error fix in zic.c
1399 changes to zic.c and the "europe" file to minimize differences
1400 between output produced by the old 32-bit zic and the new 64-bit
1404 Release 2006b - 2006-02-20 10:08:18 -0500
1405 [tz32code2006b + tz64code2006b + tzdata2006b]
1409 All SCCS IDs were bumped to "8.1" for this release.
1412 Release 2006a - 2006-01-30 08:59:31 -0500
1414 changes by Paul Eggert (in particular, Indiana time zone moves)
1416 an addition to the zic manual page to describe how special-case
1417 transitions are handled
1420 Release 2005r - 2005-12-27 09:27:13 -0500
1422 Canadian changes by Paul Eggert
1424 They also add "<pre>" directives to time zone data files and reflect
1425 changes to warning message logic in "zdump.c" (but with calls to
1426 "gettext" kept unbundled at the suggestion of Ken Pizzini).
1429 Release 2005q - 2005-12-13 09:17:09 -0500
1431 Nothing earth-shaking here:
1432 1. Electronic mail addresses have been removed.
1433 2. Casts of the return value of exit have been removed.
1434 3. Casts of the argument of is.* macros have been added.
1435 4. Indentation in one section of zic.c has been fixed.
1436 5. References to dead URLs in the data files have been dealt with.
1439 Release 2005p - 2005-12-05 10:30:53 -0500
1441 "systemv", "tz-link.htm", and "zdump.c" changes
1442 (less the casts of arguments to the is* macros)
1445 Release 2005o - 2005-11-28 10:55:26 -0500
1447 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert
1449 zdump.c lint fixes by Arthur David Olson
1452 Release 2005n - 2005-10-03 09:44:09 -0400
1454 changes by Paul Eggert (both the Uruguary changes and the Kyrgyzstan
1458 Release 2005m - 2005-08-29 12:15:40 -0400
1460 changes by Paul Eggert (with a small tweak to the tz-art change)
1462 a declaration of an unused variable has been removed from zdump.c
1465 Release 2005l - 2005-08-22 12:06:39 -0400
1467 changes by Paul Eggert
1469 overflow/underflow checks by Arthur David Olson, minus changes to
1470 the "Theory" file about the pending addition of 64-bit data (I grow
1471 less confident of the changes being accepted with each passing day,
1472 and the changes no longer increase the data files nine-fold--there's
1473 less than a doubling in size by my local Sun's reckoning)
1476 Release 2005k - 2005-07-14 14:14:24 -0400
1478 The "leapseconds" file has been edited to reflect the recently
1479 announced leap second at the end of 2005.
1481 I've also deleted electronic mail addresses from the files as an
1485 Release 2005j - 2005-06-13 14:34:13 -0400
1487 These reflect changes to limit the length of time zone abbreviations
1488 and the characters used in those abbreviations.
1490 There are also changes to handle POSIX-style "quoted" time zone
1491 environment variables.
1493 The changes were circulated on the time zone mailing list; the only
1494 change since then was the removal of a couple of minimum-length of
1495 abbreviation checks.
1498 Release data2005i - 2005-04-21 15:04:16 -0400
1500 changes (most importantly to Nicaragua and Haiti) by Paul Eggert
1503 Release 2005h - 2005-04-04 11:24:47 -0400
1505 changes by Paul Eggert
1507 minor changes to Makefile and zdump.c to produce more useful output
1508 when doing a "make typecheck"
1511 Release 2005g - 2005-03-14 10:11:21 -0500
1513 changes by Paul Eggert (a change to current DST rules in Uruguay and
1514 an update to a link to time zone software)
1517 Release 2005f - 2005-03-01 08:45:32 -0500
1519 data and documentation changes by Paul Eggert
1522 Release 2005e - 2005-02-10 15:59:44 -0500
1527 Release code2005d - 2005-01-31 09:21:47 -0500
1529 make zic complain about links to links if the -v flag is used
1531 have "make public" do more code checking
1533 add an include to "localtime.c" for the benefit of gcc systems
1536 Release 2005c - 2005-01-17 18:36:29 -0500
1538 get better results when mktime runs on a system where time_t is double
1540 changes to the data files (most importantly to Paraguay)
1543 Release 2005b - 2005-01-10 09:19:54 -0500
1545 Get localtime and gmtime working on systems with exotic time_t types.
1547 Update the leap second commentary in the "leapseconds" file.
1550 Release 2005a - 2005-01-01 13:13:44 -0500
1555 Release code2004i - 2004-12-14 13:42:58 -0500
1557 Deal with systems where time_t is unsigned.
1560 Release code2004h - 2004-12-07 11:40:18 -0500
1562 64-bit-time_t changes
1565 Release 2004g - 2004-11-02 09:06:01 -0500
1567 update to Cuba (taking effect this weekend)
1569 other changes by Paul Eggert
1571 correction of the spelling of Oslo
1573 changed versions of difftime.c and private.h
1576 Release code2004f - 2004-10-21 10:25:22 -0400
1578 Cope with wide-ranging tm_year values.
1581 Release 2004e - 2004-10-11 14:47:21 -0400
1583 Brazil/Argentina/Israel changes by Paul Eggert
1585 changes to tz-link.htm by Paul
1587 one small fix to Makefile
1590 Release 2004d - 2004-09-22 08:27:29 -0400
1592 Avoid overflow problems when TM_YEAR_BASE is added to an integer.
1595 Release 2004c - 2004-08-11 12:06:26 -0400
1597 asctime-related changes
1599 (variants of) some of the documentation changes suggested by Paul Eggert
1602 Release 2004b - 2004-07-19 14:33:35 -0400
1604 data changes by Paul Eggert--most importantly, updates for Argentina
1607 Release 2004a - 2004-05-27 12:00:47 -0400
1609 changes by Paul Eggert
1611 Handle DST transitions that occur at the end of a month in some
1612 years but at the start of the following month in other years.
1614 Add a copy of the correspondence that's the basis for claims about
1615 DST in the Navajo Nation.
1618 Release 2003e - 2003-12-15 09:36:47 -0500
1620 changes by Arthur David Olson (primarily code changes)
1622 changes by Paul Eggert (primarily data changes)
1624 minor changes to "Makefile" and "northamerica" (in the latter case,
1625 optimization of the "Toronto" rules)
1628 Release 2003d - 2003-10-06 09:34:44 -0400
1630 changes by Paul Eggert
1633 Release 2003c - 2003-09-16 10:47:05 -0400
1635 Fix bad returns in zic.c's inleap function.
1636 Thanks to Bradley White for catching the problem!
1639 Release 2003b - 2003-09-16 07:13:44 -0400
1641 Add a "--version" option (and documentation) to the zic and zdump commands.
1643 changes to overflow/underflow checking in zic
1645 a localtime typo fix.
1647 Update the leapseconds and tz-art.htm files.
1650 Release 2003a - 2003-03-24 09:30:54 -0500
1652 changes by Paul Eggert
1654 a few additions and modifications to the tz-art.htm file
1657 Release 2002d - 2002-10-15 13:12:42 -0400
1659 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab
1661 There's also a new time zone quote in "tz-art.htm".
1664 Release 2002c - 2002-04-04 11:55:20 -0500
1666 changes by Paul Eggert
1668 Change zic.c to avoid creating symlinks to files that don't exist.
1671 Release 2002b - 2002-01-28 12:56:03 -0500
1673 [These change notes are for Release 2002a, which was corrupted.
1674 2002b was a corrected version of 2002a.]
1676 changes by Paul Eggert
1678 Update the "leapseconds" file to note that there'll be no leap
1679 second at the end of June, 2002.
1681 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone.
1683 Change to "difftime.c" to avoid sizeof problems.
1686 Release 2001d - 2001-10-09 13:31:32 -0400
1688 changes by Paul Eggert
1691 Release 2001c - 2001-06-05 13:59:55 -0400
1693 changes by Paul Eggert and Andrew Brown
1696 Release 2001b - 2001-04-05 16:44:38 -0400
1698 changes by Paul Eggert (modulo jnorgard's typo fix)
1700 tz-art.htm has been htmlified.
1703 Release 2001a - 2001-03-13 12:57:44 -0500
1705 changes by Paul Eggert
1707 An addition to the "leapseconds" file: comments with the text of the
1708 latest IERS leap second notice.
1710 Trailing white space has been removed from data file lines, and
1711 repeated spaces in "Rule Jordan" lines in the "asia" file have been
1715 Release 2000h - 2000-12-14 15:33:38 -0500
1717 changes by Paul Eggert
1719 one typo fix in the "art" file
1721 With providence, this is the last update of the millenium.
1724 Release 2000g - 2000-10-10 11:35:22 -0400
1726 changes by Paul Eggert
1728 correction of John Mackin's name submitted by Robert Elz
1730 Garry Shandling's Daylight Saving Time joke (!?!) from the recent
1731 Emmy Awards broadcast.
1734 Release 2000f - 2000-08-10 09:31:58 -0400
1736 changes by Paul Eggert
1738 Added information in "tz-art.htm" on a Seinfeld reference to DST.
1740 Error checking and messages in the "yearistype" script have been
1744 Release 2000e - 2000-07-31 09:27:54 -0400
1746 data changes by Paul Eggert
1748 a change to the default value of the defined constant HAVE_STRERROR
1750 the addition of a Dave Barry quote on DST to the tz-arts file
1753 Release 2000d - 2000-04-20 15:43:04 -0400
1755 changes to the documentation and code of strftime for C99 conformance
1757 a bug fix for date.c
1759 These are based on (though modified from) changes by Paul Eggert.
1762 Release 2000c - 2000-03-04 10:31:43 -0500
1764 changes by Paul Eggert
1767 Release 2000b - 2000-02-21 12:16:29 -0500
1769 changes by Paul Eggert and Joseph Myers
1771 modest tweaks to the tz-art.htm and tz-link.htm files
1774 Release 2000a - 2000-01-18 09:21:26 -0500
1776 changes by Paul Eggert
1778 The two hypertext documents have also been renamed.
1781 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500
1783 Paul Eggert's changes
1785 additions to the "zic" manual page and the "Arts.htm" file
1788 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500
1793 Release data1999h - 1999-10-07 03:50:29 -0400
1795 changes by Paul Eggert to "europe" (most importantly, fixing
1796 Lithuania and Estonia)
1799 Release 1999g - 1999-09-28 11:06:18 -0400
1801 data changes by Paul Eggert (most importantly, the change for
1802 Lebanon that buys correctness for this coming Sunday)
1804 The "code" file contains changes to "Makefile" and "checktab.awk" to
1805 allow better checking of time zone files before they are published.
1808 Release 1999f - 1999-09-23 09:48:14 -0400
1810 changes by Arthur David Olson and Paul Eggert
1813 Release 1999e - 1999-08-17 15:20:54 -0400
1815 changes circulated by Paul Eggert, although the change to handling
1816 of DST-specifying time zone names has been commented out for now
1817 (search for "XXX" in "localtime.c" for details). These files also
1818 do not make any changes to the start of DST in Brazil.
1820 In addition to Paul's changes, there are updates to "Arts.htm" and
1824 Release 1999d - 1999-03-30 11:31:07 -0500
1826 changes by Paul Eggert
1828 The Makefile's "make public" rule has also been changed to do a test
1829 compile of each individual time zone data file (which should help
1830 avoid problems such as the one we had with Nicosia).
1833 Release 1999c - 1999-03-25 09:47:47 -0500
1835 changes by Paul Eggert, most importantly the change for Chile.
1838 Release 1999b - 1999-02-01 17:51:44 -0500
1840 changes by Paul Eggert
1842 code changes (suggested by Mani Varadarajan, mani at be.com) for
1843 correct handling of symbolic links when building using a relative directory
1845 code changes to generate correct messages for failed links
1847 updates to the URLs in Arts.htm
1850 Release 1999a - 1999-01-19 16:20:29 -0500
1852 error message internationalizations and corrections in zic.c and
1853 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz,
1857 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400
1859 changes for Brazil, Chile, and Germany
1861 support for use of "24:00" in the input files for the time zone compiler
1864 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400
1866 changes by Paul Eggert
1868 correction to a define in the "private.h" file
1871 Release data1998g - 1998-08-11 03:28:35 -0000
1872 [tzdata1998g.tar.gz is missing!]
1874 Lithuanian change provided by mgedmin at pub.osf.it
1876 Move creation of the GMT link with Etc/GMT to "etcetera" (from
1877 "backward") to ensure that the GMT file is created even where folks
1878 don't want the "backward" links (as suggested by Paul Eggert).
1881 Release data1998f - 1998-07-20 13:50:00 -0000
1882 [tzdata1998f.tar.gz is missing!]
1884 Update the "leapseconds" file to include the newly-announced
1885 insertion at the end of 1998.
1888 Release code1998f - 1998-06-01 10:18:31 -0400
1890 addition to localtime.c by Guy Harris
1893 Release 1998e - 1998-05-28 09:56:26 -0400
1895 The Makefile is changed to produce zoneinfo-posix rather than
1896 zoneinfo/posix, and to produce zoneinfo-leaps rather than
1899 data changes by Paul Eggert
1901 changes from Guy Harris to provide asctime_r and ctime_r
1903 A usno1998 file (substantially identical to usno1997) has been added.
1906 Release 1998d - 1998-05-14 11:58:34 -0400
1908 changes to comments (in particular, elimination of references to CIA maps).
1909 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places
1910 where changes occur.
1913 Release 1998c - 1998-02-28 12:32:26 -0500
1915 changes by Paul Eggert (save the "French correction," on which I'll
1916 wait for the dust to settle)
1920 changes and additions to Arts.htm
1923 Release 1998b - 1998-01-17 14:31:51 -0500
1925 URL cleanups and additions
1928 Release 1998a - 1998-01-13 12:37:35 -0500
1930 changes by Paul Eggert
1933 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500
1935 changes by Paul Eggert, with minor modifications from Arthur David
1936 Olson to make the files more browser friendly
1939 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500
1941 minor changes to put "TZif" at the start of each time zone information file
1943 a rule has also been added to the Makefile so you can
1945 to just recompile the zone information files (rather than doing a
1946 full "make install" with its other effects).
1949 Release data1997i - 1997-10-07 08:45:38 -0400
1951 changes to Africa by Paul Eggert
1954 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400
1956 corrections for Uruguay (and other locations)
1958 Arthur David Olson's simple-minded fix allowing mktime to both
1959 correctly handle leap seconds and correctly handle tm_sec values
1960 upon which arithmetic has been performed.
1963 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400
1965 Paul Eggert's updates
1967 a small change to a function prototype;
1969 "Music" has been renamed "Arts.htm", htmlified, and augmented to
1970 include information on Around the World in Eighty Days.
1973 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400
1975 fixes to zic's error handling
1977 changes inspired by the item circulated on Slovenia
1979 The description of Web resources has been htmlified for browsing
1982 A new piece of tz-related music has been added to the "Music" file.
1985 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500
1987 Paul Eggert's latest suggestions
1990 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500
1992 changes to "zic.c" to correct performance of the "-s" option
1994 a new file "usno1997"
1997 Release data1997c - 1997-03-04 09:58:18 -0500
2002 Release 1997b - 1997-02-27 18:34:19 -0500
2004 The data file incorporates the 1997 leap second.
2006 The code file incorporates Arthur David Olson's take on the
2007 zic/multiprocessor/directory-creation situation.
2010 Release 1997a - 1997-01-21 09:11:10 -0500
2012 Paul Eggert's Antarctica (and other changes)
2014 Arthur David Olson finessed the "getopt" issue by checking against
2015 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1
2016 is returned while SunOS 5.5's manual says EOF is returned).
2019 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500
2021 Paul Eggert's latest changes
2024 Release code1996n - 1996-12-16 09:42:02 -0500
2026 link snapping fix from Bruce Evans (via Garrett Wollman)
2029 Release data1996m - 1996-11-24 02:37:34 -0000
2030 [tzdata1996m.tar.gz is missing!]
2032 Paul Eggert's batch of changes
2035 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500
2037 No functional changes here; the files have simply been changed to
2038 make more use of ISO style dates in comments. The names of the above
2039 files now include the year in full.
2042 Release code96l - 1996-09-08 17:12:20 -0400
2044 tzcode96k was missing a couple of pieces.
2047 Release 96k - 1996-09-08 16:06:22 -0400
2049 the latest round of changes from Paul Eggert
2051 the recent Year 2000 material
2054 Release code96j - 1996-07-30 13:18:53 -0400
2056 Set sp->typecnt as suggested by Timothy Patrick Murphy.
2059 Release code96i - 1996-07-27 20:11:35 -0400
2061 Paul's suggested patch for strftime %V week numbers
2064 Release data96i - 1996-07-01 18:13:04 -0400
2066 "northamerica" and "europe" changes by Paul Eggert
2069 Release code96h - 1996-06-05 08:02:21 -0400
2071 fix for handling transitions specified in Universal Time
2073 Some "public domain" notices have also been added.
2076 Release code96g - 1996-05-16 14:00:26 -0400
2078 fix for the simultaneous-DST-and-zone-change challenge
2081 Release data96h - 1996-05-09 17:40:51-0400
2083 changes by Paul Eggert
2086 Release code96f-data96g - 1996-05-03 03:09:59 -0000
2087 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!]
2089 The changes get us some of the way to fixing the problems noted in Paul
2090 Eggert's letter yesterday (in addition to a few others). The approach
2091 has been to make zic a bit smarter about figuring out what time zone
2092 abbreviations apply just after the time specified in the "UNTIL" part
2093 of a zone line. Putting the smarts in zic means avoiding having
2094 transition times show up in both "Zone" lines and "Rule" lines, which
2095 in turn avoids multiple transition time entries in time zone files.
2096 (This also makes the zic input files such as "europe" a bit shorter and
2097 should ease maintenance.)
2100 Release data96f - 1996-04-19 19:20:03 -0000
2101 [tzdata96f.tar.gz is missing!]
2103 The only changes are to the "northamerica" file; the time zone
2104 abbreviation for Denver is corrected to MST (and MDT), and the
2105 comments for Mexico have been updated.
2108 Release data96e - 1996-03-19 17:37:26 -0500
2110 Proposals by Paul Eggert, in particular the Portugal change that
2111 comes into play at the end of this month.
2114 Release data96d - 1996-03-18 20:49:39 -0500
2119 Release code96e - 1996-02-29 15:43:27 -0000
2120 [tzcode96e.tar.gz is missing!]
2122 internationalization changes and the fix to the documentation for strftime
2125 Release code96d-data96c - 1996-02-12 11:05:27 -0500
2127 The "code" file simply updates Bob Kridle's electronic address.
2129 The "data" file updates rules for Mexico.
2132 Release data96b - 1996-01-27 15:44:42 -0500
2137 Release code96c - 1996-01-16 16:58:15-0500
2139 leap-year streamlining and binary-search changes
2144 Release code96b - 1996-01-10 20:42:39 -0500
2146 fixes and enhancements from Paul Eggert, including code that
2147 emulates the behavior of recent versions of the SunOS "date"
2151 Release 96a - 1996-01-06 09:08:24 -0500
2155 fixes to strftime.c for correct ISO 8601 week number generation,
2156 plus support for two new formats ('G' and 'g') to give ISO 8601 year
2157 numbers (which are not necessarily the same as calendar year numbers)
2160 Release code95i-data95m - 1995-12-21 12:46:47 -0500
2162 The latest revisions from Paul Eggert are included, the usno1995
2163 file has been updated, and a new file ("WWW") covering useful URLs
2167 Release code95h-data95l - 1995-12-19 18:10:12 -0500
2169 A simplification of a macro definition, a change to data for Sudan,
2170 and (for last minute shoppers) notes in the "Music" file on the CD
2174 Release code95g-data95k - 1995-10-30 10:32:47 -0500
2176 (slightly reformatted) 8-bit-clean proposed patch
2178 minor patch: US/Eastern -> America/New_York
2180 snapshot of the USNO's latest data ("usno1995")
2182 some other minor cleanups
2185 Release code95f-data95j - 1995-10-28 21:01:34 -0000
2186 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!]
2190 support for 64-bit time_t's
2192 optimization in localtime.c
2195 Release code95e - 1995-10-13 13:23:57 -0400
2197 the mktime change to scan from future to past when trying to find time zone
2201 Release data95i - 1995-09-26 10:43:26 -0400
2203 For Canada/Central, guess that the Sun customer's ``one week too
2204 early'' was just a approximation, and the true error is one month
2205 too early. This is consistent with the rest of Canada.
2208 Release data95h - 1995-09-21 11:26:48 -0400
2210 latest changes from Paul Eggert
2213 Release code95d - 1995-09-14 11:14:45 -0400
2215 the addition of a "Music" file, which documents four recorded
2216 versions of the tune "Save That Time".
2219 Release data95g - 1995-09-01 17:21:36 -0400
2221 "yearistype" correction
2224 Release data95f - 1995-08-28 20:46:56 -0400
2226 Paul Eggert's change to the australasia file
2229 Release data95e - 1995-07-08 18:02:34 -0400
2231 The only change is a leap second at the end of this year.
2232 Thanks to Bradley White for forwarding news on the leap second.
2235 Release data95d - 1995-07-03 13:26:22 -0400
2237 Paul Eggert's changes
2240 Release data95c - 1995-07-02 19:19:28 -0400
2242 changes to "asia", "backward", "europe", and "southamerica"
2243 (read: northamericacentrics need not apply)
2246 Release code95c - 1995-03-13 14:00:46 -0500
2248 one-line fix for sign extension problems in detzcode
2251 Release 95b - 1995-03-04 11:22:38 -0500
2253 Minor changes in both:
2255 The "code" file contains a workaround for the lack of "unistd.h" in
2256 Microsoft C++ version 7.
2258 The "data" file contains a fixed "Link" for America/Shiprock.
2261 Release 94h - 1994-12-10 12:51:14 -0500
2265 * incorporate the changes to "zdump" and "date" to make changes to
2266 the "TZ" environment variable permanent;
2268 * incorporate the table changes by Paul Eggert;
2270 * include (and document) support for universal time specifications in
2271 data files--but do not (yet) include use of this feature in the
2274 Think of this as "TZ Classic"--the software has been set up not to break if
2275 universal time shows up in its input, and the data has been left as is so as
2276 not to break existing implementations.
2279 Release data94f - 1994-08-20 12:56:09 -0400
2281 (with thanks!) the latest data updates from Paul Eggert
2284 Release data94e - 1994-06-04 13:13:53 -0400
2289 Release code94g - 1994-05-05 12:14:07 -0400
2291 fix missing "optind.c" and a reference to it in the Makefile
2294 Release code94f - 1994-05-05 13:00:33 -0000
2295 [tzcode94f.tar.gz is missing!]
2297 changes to avoid overflow in difftime, as well as changes to cope
2298 with the 52/53 challenge in strftime
2301 Release code94e - 1994-03-30 23:32:59 -0500
2303 change for the benefit of PCTS
2306 Release 94d - 1994-02-24 15:42:25 -0500
2308 Avoid clashes with POSIX semantics for zones such as GMT+4.
2310 Some other very minor housekeeping is also present.
2313 Release code94c - 1994-02-10 08:52:40 -0500
2315 Fix bug where mkdirs was broken unless you compile with
2316 -fwritable-strings (which is generally losing to do).
2319 Release 94b - 1994-02-07 10:04:33 -0500
2321 work by Paul Eggert who notes:
2323 I found another book of time zone histories by E W Whitman; it's not
2324 as extensive as Shanks but has a few goodies of its own. I used it
2325 to update the tables. I also fixed some more as a result of
2326 correspondence with Adam David and Peter Ilieve, and move some stray
2327 links from `europe' to `backward'. I corrected some scanning errors
2330 As far as the code goes, I fixed zic to allow years in the range
2331 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900.
2332 And I cleaned up the zic documentation a little bit.
2335 Release data94a - 1994-02-03 08:58:54 -0500
2337 It simply incorporates the recently announced leap second into the
2341 Release 93g - 1993-11-22 17:28:27 -0500
2343 Paul Eggert has provided a good deal of historic information (based
2344 on Shanks), and there are some code changes to deal with the buglets
2345 that crawled out in dealing with the new information.
2348 Release 93f - 1993-10-15 12:27:46 -0400
2350 Paul Eggert's changes
2353 Release 93e - 1993-09-05 21:21:44 -0400
2355 There's updated data for Israel, England, and Kwajalein; there's
2356 also an update to "zdump" to cope with Kwajalein's 24-hour jump.
2357 Thanks to Paul Eggert and Peter Ilieve for the changes.
2360 Release 93d - 1993-06-17 23:34:17 -0400
2362 new fix and new data on Israel
2365 Release 93c - 1993-06-06 19:31:55 -0400
2370 Release 93b - 1993-02-02 14:53:58 -0500
2372 updated "leapseconds" file
2375 Release 93 - 1993-01-08 07:01:06 -0500
2377 At kre's suggestion, the package has been split in two--a code piece
2378 (which also includes documentation) that's only of use to folks who
2379 want to recompile things and a data piece useful to anyone who can
2382 The new version has a few changes to the data files, a few
2383 portability changes, and an off-by-one fix (with thanks to
2384 Tom-Karzes at deshaw.com for providing a description and a
2388 Release 92c - 1992-11-21 17:35:36 -0000
2389 [tz92c.tar.Z is missing!]
2391 The fallout from the latest round of DST transitions.
2393 There are changes for Portugal, Saskatchewan, and "Pacific-New";
2394 there's also a change to "zic.c" that makes it portable to more systems.
2397 Release 92 - 1992-04-25 18:17:03 -0000
2398 [tz92.tar.Z is missing!]
2400 By popular demand (well, at any rate, following a request by kre at munnari)
2403 The 1989 update of the time zone package featured:
2405 * POSIXization (including interpretation of POSIX-style TZ environment
2406 variables, provided by Guy Harris),
2407 * ANSIfication (including versions of "mktime" and "difftime"),
2408 * SVIDulation (an "altzone" variable)
2409 * MACHination (the "gtime" function)
2410 * corrections to some time zone data (including corrections to the rules
2411 for Great Britain and New Zealand)
2412 * reference data from the United States Naval Observatory for folks who
2413 want to do additional time zones
2414 * and the 1989 data for Saudi Arabia.
2416 (Since this code will be treated as "part of the implementation" in some
2417 places and as "part of the application" in others, there's no good way to
2418 name functions, such as timegm, that are not part of the proposed ANSI C
2419 standard; such functions have kept their old, underscore-free names in this
2422 And the "dysize" function has disappeared; it was present to allow
2423 compilation of the "date" command on old BSD systems, and a version of "date"
2424 is now provided in the package. The "date" command is not created when you
2425 "make all" since it may lack options provided by the version distributed with
2426 your operating system, or may not interact with the system in the same way
2427 the native version does.
2429 Since POSIX frowns on correct leap second handling, the default behavior of
2430 the "zic" command (in the absence of a "-L" option) has been changed to omit
2431 leap second information from its output files.
2437 This file contains copies of the part of each release announcement
2438 that talks about the changes in that release. The text has been
2439 adapted and reformatted for the purposes of this file.
2441 Typically a release R consists of a pair of tarball files,
2442 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g.,
2443 code2010a, data2012c) consist of just one or the other tarball, and a
2444 few (e.g., code2012c-data2012d) have tarballs with mixed version
2447 Release time stamps are taken from the release's commit (for newer,
2448 git releases), from the newest file in the tarball (for older
2449 releases, where this info is available) or from the email announcing
2450 the release (if all else fails; these are marked with a timezone of
2451 -0000 and an "is missing!" comment).
2453 Earlier versions of the code and data were not announced on the tz
2454 list and are not summarized here.
2456 This file is in the public domain.