1 News for the tz database
4 Release 2014c - 2014-05-13 07:44:13 -0700
6 Changes affecting near-future time stamps
8 Egypt observes DST starting May 15. (Thanks to Ahmad El-Dardiry.)
9 Details have not been announced, except that DST will not be observed
10 during Ramadan. Guess that DST will stop during the same Ramadan dates as
11 Morocco, and that Egypt's future spring and fall transitions will be the
12 same as 2010 when it last observed DST, namely April's last Friday at
13 00:00 to September's last Thursday at 23:00 standard time. Also, guess
14 that Ramadan transitions will be at 00:00 standard time.
16 Changes affecting code
18 zic now generates transitions for minimum time values, eliminating guesswork
19 when handling low-valued time stamps. (Thanks to Arthur David Olson.)
21 Port to Cygwin sans glibc. (Thanks to Arthur David Olson.)
23 Changes affecting commentary and documentation
25 Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.)
28 Release 2014b - 2014-03-24 21:28:50 -0700
30 Changes affecting near-future time stamps
32 Crimea switches to Moscow time on 2014-03-30 at 02:00 local time.
33 (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU.
35 New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and
36 Bengt-Inge Larsson.) This is currently an approximation; a better version
37 will require the zic and localtime fixes mentioned below, and the plan is
38 to wait for a while until at least the zic fixes propagate.
40 Changes affecting code
42 'zic' and 'localtime' no longer reject locations needing four transitions
43 per year for the forseeable future. (Thanks to Andrew Main (Zefram).)
44 Also, 'zic' avoids some unlikely failures due to integer overflow.
46 Changes affecting build procedure
48 'make check' now detects Rule lines defined but never used.
49 The NZAQ rules, an instance of this problem, have been removed.
51 Changes affecting commentary and documentation
53 Fix Tuesday/Thursday typo in description of time in Israel.
54 (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.)
56 Microsoft Windows 8.1 doesn't support tz database names. (Thanks
57 to Donald MacQueen.) Instead, the Microsoft Windows Store app
58 library supports them.
60 Add comments about Johnston Island time in the 1960s.
61 (Thanks to Lyle McElhaney.)
63 Morocco's 2014 DST start will be as predicted.
64 (Thanks to Sebastien Willemijns.)
67 Release 2014a - 2014-03-07 23:30:29 -0800
69 Changes affecting near-future time stamps
71 Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for
72 the heads-up, and to Tim Parenti for simplifying the update.)
74 Changes affecting past time stamps
76 Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00.
77 (Thanks to Steffen Thorsen.)
79 Ukraine switched from Moscow to Eastern European time on 1990-07-01
80 (not 1992-01-01), and observed DST during the entire next winter.
81 (Thanks to Vladimir in Moscow via Alois Treindl.)
83 In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03.
84 (Thanks to Avigdor Finkelstein.)
86 Changes affecting code
88 A uninitialized-storage bug in 'localtime' has been fixed.
89 (Thanks to Logan Chien.)
91 Changes affecting the build procedure
93 The settings for 'make check_web' now default to Ubuntu 13.10.
95 Changes affecting commentary and documentation
97 The boundary of the US Pacific time zone is given more accurately.
98 (Thanks to Alan Mintz.)
100 Chile's 2014 DST will be as predicted. (Thanks to Jose Miguel Garrido.)
102 Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Raul Perasso.)
104 Better descriptions of countries with same time zone history as
105 Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.)
107 Several changes affect tz-link.htm, the main web page.
109 Mention Time.is (thanks to Even Scharning) and WX-now (thanks to
112 Mention xCal (Internet RFC 6321) and jCal.
114 Microsoft has some support for tz database names.
116 CLDR data is available in both XML and JSON form.
118 Mention Maggiolo's map of solar vs standard time.
119 (Thanks to Arthur David Olson.)
121 Mention TZ4Net. (Thanks to Matt Johnson.)
123 Mention the timezone-olson Haskell package.
125 Mention zeitverschiebung.net. (Thanks to Martin Jaeger.)
127 Remove moribund links to daylight-savings-time.info and to
128 Simple Timer + Clocks.
130 Update two links. (Thanks to Oscar van Vlijmen.)
132 Fix some formatting glitches, e.g., remove random newlines from
133 abbr elements' title attributes.
136 Release 2013i - 2013-12-17 07:25:23 -0800
138 Changes affecting near-future time stamps:
140 Jordan switches back to standard time at 00:00 on December 20, 2013.
141 The 2006-2011 transition schedule is planned to resume in 2014.
142 (Thanks to Steffen Thorsen.)
144 Changes affecting past time stamps:
146 In 2004, Cuba began DST on March 28, not April 4.
147 (Thanks to Steffen Thorsen.)
149 Changes affecting code
151 The compile-time flag NOSOLAR has been removed, as nowadays the
152 benefit of slightly shrinking runtime table size is outweighed by the
153 cost of disallowing potential future updates that exceed old limits.
155 Changes affecting documentation and commentary
157 The files solar87, solar88, and solar89 are no longer distributed.
158 They were a negative experiment -- that is, a demonstration that
159 tz data can represent solar time only with some difficulty and error.
160 Their presence in the distribution caused confusion, as Riyadh
161 civil time was generally not solar time in those years.
163 tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.)
166 Release 2013h - 2013-10-25 15:32:32 -0700
168 Changes affecting current and future time stamps:
170 Libya has switched its time zone back to UTC+2 without DST,
171 instead of UTC+1 with DST. (Thanks to Even Scharning.)
173 Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules.
174 (Thanks to Gwillim Law.)
176 Changes affecting future time stamps:
178 Acre and (we guess) western Amazonas will switch from UTC-4 to UTC-5
179 on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe.
180 (Thanks to Steffen Thorsen.)
182 Add entries for DST transitions in Morocco in the year 2038.
183 This avoids some year-2038 glitches introduced in 2013g.
184 (Thanks to Yoshito Umaoka for reporting the problem.)
186 Changes affecting API
188 The 'tzselect' command no longer requires the 'select' command,
189 and should now work with /bin/sh on more platforms. It also works
190 around a bug in BusyBox awk before version 1.21.0. (Thanks to
191 Patrick 'P. J.' McDermott.)
193 Changes affecting code
195 Fix localtime overflow bugs with 32-bit unsigned time_t.
197 zdump no longer assumes sscanf returns maximal values on overflow.
199 Changes affecting the build procedure
201 The builder can specify which programs to use, if any, instead of
202 'ar' and 'ranlib', and libtz.a is now built locally before being
203 installed. (Thanks to Michael Forney.)
205 A dependency typo in the 'zdump' rule has been fixed.
206 (Thanks to Andrew Paprocki.)
208 The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f'
209 work as specified by POSIX.2-1992 or later; this is portable nowadays.
211 'make clean' no longer removes 'leapseconds', since it's
212 host-independent and is part of the distribution.
214 The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed.
216 Changes affecting documentation and commentary
218 tz-link.htm now mentions TC TIMEZONE's draft timezone service protocol
219 (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle).
221 Update URLs in tz-link page. Add URLs for Microsoft Windows, since
222 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no
223 longer maintained) and for old advisories. SOFA now does C.
225 Release 2013g - 2013-09-30 21:08:26 -0700
227 Changes affecting current and near-future time stamps
229 Morocco now observes DST from the last Sunday in March to the last
230 Sunday in October, not April to September respectively. (Thanks
233 Changes affecting 'zic'
235 'zic' now runs on platforms that lack both hard links and symlinks.
236 (Thanks to Theo Veenker for reporting the problem, for MinGW.)
237 Also, fix some bugs on platforms that lack hard links but have symlinks.
239 'zic -v' again warns that Asia/Tehran has no POSIX environment variable
240 to predict the far future, fixing a bug introduced in 2013e.
242 Changes affecting the build procedure
244 The 'leapseconds' file is again put into the tzdata tarball.
245 Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to
246 Matt Burgess and Ian Abbott.) The timestamps of these and other
247 dependent files in tarballs are adjusted more consistently.
249 Changes affecting documentation and commentary
251 The README file is now part of the data tarball as well as the code.
252 It now states that files are public domain unless otherwise specified.
253 (Thanks to Andrew Main (Zefram) for asking for clarifications.)
254 Its details about the 1989 release moved to a place of honor near
258 Release 2013f - 2013-09-24 23:37:36 -0700
260 Changes affecting near-future time stamps
262 Tocantins will very likely not observe DST starting this spring.
263 (Thanks to Steffen Thorsen.)
265 Jordan will likely stay at UTC+3 indefinitely, and will not fall
268 Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.)
270 Changes affecting API
272 The types of the global variables 'timezone' and 'altzone' (if present)
273 have been changed back to 'long'. This is required for 'timezone'
274 by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
275 These variables were originally 'long' in the tz code, but were
276 mistakenly changed to 'time_t' in 1987; nobody reported the
277 incompatibility until now. The difference matters on x32, where
278 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.)
280 Changes affecting the build procedure
282 Avoid long strings in leapseconds.awk to work around a mawk bug.
283 (Thanks to Cyril Baurand.)
285 Changes affecting documentation and commentary
287 New file 'NEWS' that contains release notes like this one.
289 Paraguay's law does not specify DST transition time; 00:00 is customary.
290 (Thanks to Waldemar Villamayor-Venialbo.)
292 Minor capitalization fixes.
294 Changes affecting version-control only
296 The experimental github repository now contains annotated and
297 signed tags for recent releases, e.g., '2013e' for Release 2013e.
298 Releases are tagged starting with 2012e; earlier releases were
299 done differently, and tags would either not have a simple name or
300 not exactly match what was released.
302 'make set-timestamps' is now simpler and a bit more portable.
305 Release 2013e - 2013-09-19 23:50:04 -0700
307 Changes affecting near-future time stamps
309 This year Fiji will start DST on October 27, not October 20.
310 (Thanks to David Wheeler for the heads-up.) For now, guess that
311 Fiji will continue to spring forward the Sunday before the fourth
314 Changes affecting current and future time zone abbreviations
316 Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian
317 time zone abbreviations since 1932. (Thanks to George Ziegler,
318 Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and
319 Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura,
320 Asia/Makassar, and Asia/Pontianak.
322 Use ART (UTC-3, standard time), rather than WARST (also UTC-3, but
323 daylight saving time) for San Luis, Argentina since 2009.
325 Changes affecting Godthab time stamps after 2037 if version mismatch
327 Allow POSIX-like TZ strings where the transition time's hour can
328 range from -167 through 167, instead of the POSIX-required 0
329 through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the
330 new Fiji rules. This is a more-compact way to represent
331 far-future time stamps for America/Godthab, America/Santiago,
332 Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem,
333 Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by
334 this change. (Derived from a suggestion by Arthur David Olson.)
336 Allow POSIX-like TZ strings where daylight saving time is in
337 effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western
338 Argentina Summer Time all year. This supports a more-compact way
339 to represent the 2013d data for America/Argentina/San_Luis.
340 Because of the change for San Luis noted above this change does not
341 affect the current data. (Thanks to Andrew Main (Zefram) for
342 suggestions that improved this change.)
344 Where these two TZ changes take effect, there is a minor extension
345 to the tz file format in that it allows new values for the
346 embedded TZ-format string, and the tz file format version number
347 has therefore been increased from 2 to 3 as a precaution.
348 Version-2-based client code should continue to work as before for
349 all time stamps before 2038. Existing version-2-based client code
350 (tzcode, GNU/Linux, Solaris) has been tested on version-3-format
351 files, and typically works in practice even for time stamps after
352 2037; the only known exception is America/Godthab.
354 Changes affecting time stamps before 1970
356 Pacific/Johnston is now a link to Pacific/Honolulu. This corrects
357 some errors before 1947.
359 Some zones have been turned into links, when they differ from
360 existing zones only in older data that was likely invented or that
361 differs only in LMT or transition from LMT. These changes affect
362 only time stamps before 1943. The affected zones are:
363 Africa/Juba, America/Anguilla, America/Aruba, America/Dominica,
364 America/Grenada, America/Guadeloupe, America/Marigot,
365 America/Montserrat, America/St_Barthelemy, America/St_Kitts,
366 America/St_Lucia, America/St_Thomas, America/St_Vincent,
367 America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for
368 confirming that the old Europe/Vaduz zone was wrong and the new
369 link is better for WWII-era times.)
371 Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects
372 America/Cayman, America/Jamaica and America/Grand_Turk time stamps
375 Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
376 This affects Europe/Zurich time stamps from 1853 to 1894. (Thanks
379 Change the date of the circa-1850 Zurich transition from 1849-09-12
380 to 1853-07-16, overriding Shanks with data from Messerli about
381 postal and telegraph time in Switzerland.
383 Changes affecting time zone abbreviations before 1970
385 For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932,
386 as Jakarta was called Batavia back then.
388 Changes affecting API
390 The 'zic' command now outputs a dummy transition when far-future
391 data can't be summarized using a TZ string, and uses a 402-year
392 window rather than a 400-year window. For the current data, this
393 affects only the Asia/Tehran file. It does not affect any of the
394 time stamps that this file represents, so zdump outputs the same
395 information as before. (Thanks to Andrew Main (Zefram).)
397 The 'date' command has a new '-r' option, which lets you specify
398 the integer time to display, a la FreeBSD.
400 The 'tzselect' command has two new options '-c' and '-n', which lets you
401 select a zone based on latitude and longitude.
403 The 'zic' command's '-v' option now warns about constructs that
404 require the new version-3 binary file format. (Thanks to Arthur
405 David Olson for the suggestion.)
407 Support for floating-point time_t has been removed.
408 It was always dicey, and POSIX no longer requires it.
409 (Thanks to Eric Blake for suggesting to the POSIX committee to
410 remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
411 Heninger, Arthur David Olson, and Alois Treindl, for reporting
412 bugs and elucidating some of the corners of the old floating-point
415 The signatures of 'offtime', 'timeoff', and 'gtime' have been
416 changed back to the old practice of using 'long' to represent UT
417 offsets. This had been inadvertently and mistakenly changed to
418 'int_fast32_t'. (Thanks to Christos Zoulos.)
420 The code avoids undefined behavior on integer overflow in some
421 more places, including gmtime, localtime, mktime and zdump.
423 Changes affecting the zdump utility
425 zdump now outputs "UT" when referring to Universal Time, not "UTC".
426 "UTC" does not make sense for time stamps that predate the introduction
427 of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen
428 for clarifying UT vs UTC.)
430 Data changes affecting behavior of tzselect and similar programs
432 Country code BQ is now called the more-common name "Caribbean Netherlands"
433 rather than the more-official "Bonaire, St Eustatius & Saba".
435 Remove from zone.tab the names America/Montreal, America/Shiprock,
436 and Antarctica/South_Pole, as they are equivalent to existing
437 same-country-code zones for post-1970 time stamps. The data for
438 these names are unchanged, so the names continue to work as before.
440 Changes affecting code internals
442 zic -c now runs way faster on 64-bit hosts when given large numbers.
444 zic now uses vfprintf to avoid allocating and freeing some memory.
446 tzselect now computes the list of continents from the data,
447 rather than have it hard-coded.
449 Minor changes pacify GCC 4.7.3 and GCC 4.8.1.
451 Changes affecting the build procedure
453 The 'leapseconds' file is now generated automatically from a
454 new file 'leap-seconds.list', which is a copy of
455 <ftp://time.nist.gov/pub/leap-seconds.list>.
456 A new source file 'leapseconds.awk' implements this.
457 The goal is simplification of the future maintenance of 'leapseconds'.
459 When building the 'posix' or 'right' subdirectories, if the
460 subdirectory would be a copy of the default subdirectory, it is
461 now made a symbolic link if that is supported. This saves about
462 2 MB of file system space.
464 The links America/Shiprock and Antarctica/South_Pole have been
465 moved to the 'backward' file. This affects only nondefault builds
466 that omit 'backward'.
468 Changes affecting version-control only
470 .gitignore now ignores 'date'.
472 Changes affecting documentation and commentary
474 Changes to the 'tzfile' man page
476 It now mentions that the binary file format may be extended in
477 future versions by appending data.
479 It now refers to the 'zdump' and 'zic' man pages.
481 Changes to the 'zic' man page
483 It lists conditions that elicit a warning with '-v'.
485 It says that the behavior is unspecified when duplicate names
486 are given, or if the source of one link is the target of another.
488 Its examples are updated to match the latest data.
490 The definition of white space has been clarified slightly.
491 (Thanks to Michael Deckers.)
493 Changes to the 'Theory' file
495 There is a new section about the accuracy of the tz database,
496 describing the many ways that errors can creep in, and
497 explaining why so many of the pre-1970 time stamps are wrong or
498 misleading (thanks to Steve Allen, Lester Caine, and Garrett
499 Wollman for discussions that contributed to this).
501 The 'Theory' file describes LMT better (this follows a
502 suggestion by Guy Harris).
504 It refers to the 2013 edition of POSIX rather than the 2004 edition.
506 It's mentioned that excluding 'backward' should not affect the
507 other data, and it suggests at least one zone.tab name per
508 inhabited country (thanks to Stephen Colebourne).
510 Some longstanding restrictions on names are documented, e.g.,
511 'America/New_York' precludes 'America/New_York/Bronx'.
513 It gives more reasons for the 1970 cutoff.
515 It now mentions which time_t variants are supported, such as
516 signed integer time_t. (Thanks to Paul Goyette for reporting
517 typos in an experimental version of this change.)
519 (Thanks to Philip Newton for correcting typos in these changes.)
521 Documentation and commentary is more careful to distinguish UT in
522 general from UTC in particular. (Thanks to Steve Allen.)
524 Add a better source for the Zurich 1894 transition.
525 (Thanks to Pierre-Yves Berger.)
527 Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.)
530 Release 2013d - 2013-07-05 07:38:01 -0700
532 Changes affecting future time stamps:
534 Morocco's midsummer transitions this year are July 7 and August 10,
535 not July 9 and August 8. (Thanks to Andrew Paprocki.)
537 Israel now falls back on the last Sunday of October.
538 (Thanks to Ephraim Silverberg.)
540 Changes affecting past time stamps:
542 Specify Jerusalem's location more precisely; this changes the pre-1880
545 Changing affecting metadata only:
547 Fix typos in the entries for country codes BQ and SX.
549 Changes affecting code:
551 Rework the code to fix a bug with handling Australia/Macquarie on
552 32-bit hosts (thanks to Arthur David Olson).
554 Port to platforms like NetBSD, where time_t can be wider than long.
556 Add support for testing time_t types other than the system's.
557 Run 'make check_time_t_alternatives' to try this out.
558 Currently, the tests fail for unsigned time_t;
559 this should get fixed at some point.
561 Changes affecting documentation and commentary:
563 Deemphasize the significance of national borders.
565 Update the zdump man page.
567 Remove obsolete NOID comment (thanks to Denis Excoffier).
569 Update several URLs and comments in the web pages.
571 Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler).
573 Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka).
576 Release 2013c - 2013-04-19 16:17:40 -0700
578 Changes affecting current and future time stamps:
580 Palestine observed DST starting March 29, 2013. (Thanks to
581 Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST,
582 with the predicted rules being the last Thursday in March at 24:00
583 to the first Friday on or after September 21 at 01:00.
585 Assume that the recent change to Paraguay's DST rules is permanent,
586 by moving the end of DST to the 4th Sunday in March every year.
587 (Thanks to Carlos Raul Perasso.)
589 Changes affecting past time stamps:
591 Fix some historical data for Palestine to agree with that of
592 timeanddate.com, as follows:
594 The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not
597 The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not
600 The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27.
602 The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2.
604 The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01.
606 The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00.
608 Fix times of habitation for Macquarie to agree with the Tasmania
609 Parks & Wildlife Service history, which indicates that permanent
610 habitation was 1899-1919 and 1948 on.
612 Changing affecting metadata only:
614 Macquarie Island is politically part of Australia, not Antarctica.
615 (Thanks to Tobias Conradi.)
617 Sort Macquarie more-consistently with other parts of Australia.
618 (Thanks to Tim Parenti.)
621 Release 2013b - 2013-03-10 22:33:40 -0700
623 Changes affecting current and future time stamps:
625 Haiti uses US daylight-saving rules this year, and presumably future years.
626 This changes time stamps starting today. (Thanks to Steffen Thorsen.)
628 Paraguay will end DST on March 24 this year.
629 (Thanks to Steffen Thorsen.) For now, assume it's just this year.
631 Morocco does not observe DST during Ramadan;
632 try to predict Ramadan in Morocco as best we can.
633 (Thanks to Erik Homoet for the heads-up.)
635 Changes affecting commentary:
637 Update URLs in tz-link page. Add URLs for webOS, BB10, iOS.
638 Update URL for Solaris. Mention Internet RFC 6557.
639 Update Internet RFCs 2445->5545, 2822->5322.
640 Switch from FTP to HTTP for Internet RFCs.
643 Release 2013a - 2013-02-27 09:20:35 -0800
645 Change affecting binary data format:
647 The zone offset at the end of version-2-format zone files is now
648 allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthor David Olson.)
650 Changes affecting current and future time stamps:
652 Chile's 2013 rules, and we guess rules for 2014 and later, will be
653 the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC.
654 (Thanks to Steffen Thorsen and Robert Elz.)
656 New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen.
657 (Thanks to Tobias Conradi and Arthur David Olson.)
659 Many changes affect historical time stamps before 1940.
660 These were deduced from: Milne J. Civil time. Geogr J. 1899
661 Feb;13(2):173-94 <http://www.jstor.org/stable/1774359>.
663 Changes affecting the code:
665 Fix zic bug that mishandled Egypt's 2010 changes (this also affected
666 the data). (Thanks to Arthur David Olson.)
668 Fix localtime bug when time_t is unsigned and data files were generated
669 by a signed time_t system. (Thanks to Doug Bailey for reporting and
670 to Arthur David Olson for fixing.)
672 Allow the email address for bug reports to be set by the packager.
673 The default is tz@iana.org, as before. (Thanks to Joseph S. Myers.)
675 Update HTML checking to be compatible with Ubuntu 12.10.
677 Check that files are a safe subset of ASCII. At some point we may
678 relax this requirement to a safe subset of UTF-8. Without the
679 check, some non-UTF-8 encodings were leaking into the distribution.
683 Restore a comment about copyright notices that was inadvertently deleted.
684 (Thanks to Arthur David Olson.)
686 Improve the commentary about which districts observe what times
687 in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson).
689 Add web page links to tz.js.
691 Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.)
694 Release 2012j - 2012-11-12 18:34:49 -0800
696 Libya moved to CET this weekend, but with DST planned next year.
697 (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.)
699 Signatures now have the extension .asc, not .sign, as that's more
700 standard. (Thanks to Phil Pennock.)
702 The output of 'zdump --version', and of 'zic --version', now
703 uses a format that is more typical for --version.
704 (Thanks to Joseph S. Myers.)
706 The output of 'tzselect --help', 'zdump --help', and 'zic --help'
707 now uses tz@iana.org rather than the old elsie address.
709 zic -v now complains about abbreviations that are less than 3
710 or more than 6 characters, as per Posix. Formerly, it checked
711 for abbreviations that were more than 3.
713 'make public' no longer puts its temporary directory under /tmp,
714 and uses the just-built zic rather than the system zic.
716 Various fixes to documentation and commentary.
719 Release 2012i - 2012-11-03 12:57:09 -0700
721 Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.)
723 Linker flags can now be specified via LDFLAGS.
724 AWK now defaults to 'awk', not 'nawk'.
725 The shell in tzselect now defaults to /bin/bash, but this can
726 be overridden by specifying KSHELL.
727 The main web page now mentions the unofficial github repository.
728 (Thanks to Mike Frysinger.)
730 Tarball signatures can now be built by running 'make signatures'.
731 There are also new makefile rules 'tarballs', 'check_public', and
732 separate makefile rules for each tarball and signature file.
733 A few makefile rules are now more portable to strict POSIX.
735 The main web page now lists the canonical IANA URL.
738 Release 2012h - 2012-10-26 22:49:10 -0700
740 Bahia no longer has DST. (Thanks to Kelley Cook.)
742 Tocantins has DST. (Thanks to Rodrigo Severo.)
744 Israel has new DST rules next year. (Thanks to Ephraim Silverberg.)
746 Jordan stays on DST this winter. (Thanks to Steffen Thorsen.)
750 More C modernization, except that at Arthur David Olson's suggestion
751 the instances of 'register' were kept.
754 Release 2012g - 2012-10-17 20:59:45 -0700
756 Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.)
758 Palestine fall 2012. (Thanks to Steffen Thorsen.)
762 To attack the version-number problem, this release ships the file
763 'Makefile' (which contains the release number) in both the tzcode and
764 the tzdata tarballs. The two Makefiles are identical, and should be
765 identical in any matching pair of tarballs, so it shouldn't matter
766 which order you extract the tarballs. Perhaps we can come up with a
767 better version-number scheme at some point; this scheme does have the
768 virtue of not adding more files.
771 Release 2012f - 2012-09-12 23:17:03 -0700
773 * australasia (Pacific/Fiji): Fiji DST is October 21 through January
774 20 this year. (Thanks to Steffen Thorsen.)
777 Release 2012e - 2012-08-02 20:44:55 -0700
779 * australasia (Pacific/Fakaofo): Tokelau is UTC+13, not UTC+14.
780 (Thanks to Steffen Thorsen.)
782 * Use a single version number for both code and data.
784 * .gitignore: New file.
786 * Remove trailing white space.
789 Release code2012c-data2012d - 2012-07-19 16:35:33 -0700
791 Changes for Morocco's time stamps, which take effect in a couple of
792 hours, along with infrastructure changes to accommodate how the tz
793 code and data are released on IANA.
796 Release data2012c - 2012-03-27 12:17:25 -0400
799 Summer time changes for Morocco (to start late April 2012)
802 Changes for 2012 for Gaza & the West Bank (Hebron) and Syria
805 Haiti following US/Canada rules for 2012 (and we're assuming,
806 for now anyway, for the future).
809 Release 2012b - 2012-03-02 12:29:15 +0700
811 There is just one change to tzcode2012b (compared with 2012a):
812 the Makefile that was accidentally included with 2012a has been
813 replaced with the version that should have been there, which is
814 identical with the previous version (from tzcode2011i).
816 There are just two changes in tzdata2012b compared with 2012a.
818 Most significantly, summer time in Cuba has been delayed 3 weeks
819 (now starts April 1 rather than March 11). Since Mar 11 (the old start
820 date, as listed in 2012a) is just a little over a week away, this
823 Less importantly, an excess tab in one of the changes in zone.tab
824 in 2012a has been removed.
827 Release 2012a - 2012-03-01 18:28:10 +0700
829 The changes in tzcode2012a (compared to the previous version, 2011i)
830 are entirely to the README and tz-art.htm and tz-link.htm files, if
831 none of those concern you, you can ignore the code update. The changes
832 reflect the changed addresses for the mailing list and the code and
833 data distribution points & methods (and a link to DateTime::TimeZone::Tzfile
834 has been added to tz-link.htm).
836 In tzdata2012a (compared to the previous release, which was 2011n)
837 the major changes are:
838 Chile 2011/2012 and 2012/2013 summer time date adjustments.
839 Falkland Islands onto permanent summer time (we're assuming for the
840 foreseeable future, though 2012 is all we're fairly certain of.)
841 Armenia has abolished Summer Time.
842 Tokelau jumped the International Date Line back last December
843 (just the same as their near neighbour, Samoa).
844 America/Creston is a new zone for a small area of British Columbia
845 There will be a leapsecond 2012-06-30 23:59:60 UTC.
847 Other minor changes are:
848 Corrections to 1918 Canadian summer time end dates.
849 Updated URL for UK timezone history (in comments)
850 A few typos in Le Corre's list of free French place names (comments)
853 Release data2011n - 2011-10-30 14:57:54 +0700
855 There are three changes of note - most urgently, Cuba (America/Havana)
856 has extended summer time by two weeks, now to end on Nov 13, rather than
857 the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic
858 (Europe/Tiraspol) decided not to split from the rest of Moldova after
859 all, and consequently that zone has been removed (again) and reinstated
860 in the "backward" file as a link to Europe/Chisinau. And third, the
861 end date for Fiji's summer time this summer was moved forward from the
862 earlier planned Feb 26, to Jan 22.
864 Apart from that, Moldova (MD) returns to a single entry in zone.tab
865 (and the incorrect syntax that was in the 2011m version of that file
866 is so fixed - it would have been fixed in a different way had this
867 change not happened - that's the "missing" sccs version id).
870 Release data2011m - 2011-10-24 21:42:16 +0700
872 In particular, the typos in comments in the data (2011-11-17 should have
873 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that
874 Tim Parenti noted) have been fixed, and the change for Ukraine has been
875 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to
876 Tim Parenti, and also Denys Gavrysh)
878 In addition, I added Europe/Tiraspol to zone.tab.
880 This time, all the files have new version numbers... (including the files
881 otherwise unchanged in 2011m that were changed in 2011l but didn't get new
882 version numbers there...)
885 Release data2011l - 2011-10-10 11:15:43 +0700
887 There are just 2 changes that cause different generated tzdata files from
888 zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil
889 is included, but commented out. Compared with the diff I sent out last week,
890 this version also includes attributions for the sources for the changes
891 (in much the same format as ado used, but the html tags have not been
892 checked, verified, or used in any way at all, so if there are errors there,
896 Release data2011k - 2011-09-20 17:54:03 -0400
901 Release data2011j - 2011-09-12 09:22:49 -0400
903 (contemporary changes for Samoa; past changes for Kenya, Uganda, and
904 Tanzania); there are also two spelling corrections to comments in
905 the australasia file (with thanks to Christos Zoulas).
908 Release 2011i - 2011-08-29 05:56:32 -0400
913 Release data2011h - 2011-06-15 18:41:48 -0400
915 Russia and Curacao changes
918 Release 2011g - 2011-04-25 09:07:22 -0400
920 update the rules for Egypt to reflect its abandonment of DST this year
923 Release 2011f - 2011-04-06 17:14:53 -0400
928 Release 2011e - 2011-03-31 16:04:38 -0400
930 Morocco, Chile, and tz-link changes
933 Release 2011d - 2011-03-14 09:18:01 -0400
935 changes that impact present-day time stamps in Cuba, Samoa, and Turkey
938 Release 2011c - 2011-03-07 09:30:09 -0500
940 These do affect current time stamps in Chile and Annette Island, Canada.
943 Release 2011b - 2011-02-07 08:44:50 -0500
948 Release 2011a - 2011-01-24 10:30:16 -0500
953 Release data2010o - 2010-11-01 09:18:23 -0400
955 change to the end of DST in Fiji in 2011
958 Release 2010n - 2010-10-25 08:19:17 -0400
963 Release 2010m - 2010-09-27 09:24:48 -0400
965 Hong Kong, Vostok, and zic.c changes
968 Release 2010l - 2010-08-16 06:57:25 -0400
973 Release 2010k - 2010-07-26 10:42:27 -0400
978 Release 2010j - 2010-05-10 09:07:48 -0400
980 changes for Bahia de Banderas and for version naming
983 Release data2010i - 2010-04-16 18:50:45 -0400
985 the end of DST in Morocco on 2010-08-08
988 Release data2010h - 2010-04-05 09:58:56 -0400
993 Release data2010g - 2010-03-24 11:14:53 -0400
998 Release 2010f - 2010-03-22 09:45:46 -0400
1003 Release data2010e - 2010-03-08 14:24:27 -0500
1005 corrects the Dhaka bug found by Danvin Ruangchan
1008 Release data2010d - 2010-03-06 07:26:01 -0500
1013 Release 2010c - 2010-03-01 09:20:58 -0500
1015 changes including KRE's suggestion for earlier initialization of
1016 "goahead" and "goback" structure elements
1019 Release code2010a - 2010-02-16 10:40:04 -0500
1024 Release data2010b - 2010-01-20 12:37:01 -0500
1029 Release data2010a - 2010-01-18 08:30:04 -0500
1034 Release data2009u - 2009-12-26 08:32:28 -0500
1036 changes to DST in Bangladesh
1039 Release 2009t - 2009-12-21 13:24:27 -0500
1044 Release data2009s - 2009-11-14 10:26:32 -0500
1046 (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change
1049 Release 2009r - 2009-11-09 10:10:31 -0500
1051 "antarctica" and "tz-link.htm" changes
1054 Release 2009q - 2009-11-02 09:12:40 -0500
1056 with two corrections as reported by Eric Muller and Philip Newton
1059 Release data2009p - 2009-10-23 15:05:27 -0400
1061 Argentina (including San Luis) changes (with the correction from
1065 Release data2009o - 2009-10-14 16:49:38 -0400
1067 Samoa (commentary only), Pakistan, and Bangladesh changes
1070 Release data2009n - 2009-09-22 15:13:38 -0400
1072 added commentary for Argentina and a change to the end of DST in
1076 Release data2009m - 2009-09-03 10:23:43 -0400
1078 Samoa and Palestine changes
1081 Release data2009l - 2009-08-14 09:13:07 -0400
1083 Samao (comments only) and Egypt
1086 Release 2009k - 2009-07-20 09:46:08 -0400
1091 Release data2009j - 2009-06-15 06:43:59 -0400
1093 Bangladesh change (with a short turnaround since the DST change is
1097 Release 2009i - 2009-06-08 09:21:22 -0400
1099 updating for DST in Bangladesh this year
1102 Release 2009h - 2009-05-26 09:19:14 -0400
1107 Release data2009g - 2009-04-20 16:34:07 -0400
1112 Release data2009f - 2009-04-10 11:00:52 -0400
1114 correct DST in Pakistan
1117 Release 2009e - 2009-04-06 09:08:11 -0400
1122 Release 2009d - 2009-03-23 09:38:12 -0400
1124 Morocco, Tunisia, Argentina, and American Astronomical Society changes
1127 Release data2009c - 2009-03-16 09:47:51 -0400
1129 change to the start of Cuban DST
1132 Release 2009b - 2009-02-09 11:15:22 -0500
1137 Release 2009a - 2009-01-21 10:09:39 -0500
1142 Release data2008i - 2008-10-21 12:10:25 -0400
1144 southamerica and zone.tab files, with Argentina DST rule changes and
1145 United States zone reordering and recommenting
1148 Release 2008h - 2008-10-13 07:33:56 -0400
1153 Release 2008g - 2008-10-06 09:03:18 -0400
1155 Fix a broken HTML anchor and update Brazil's DST transitions;
1156 there's also a slight reordering of information in tz-art.htm.
1159 Release data2008f - 2008-09-09 22:33:26 -0400
1164 Release 2008e - 2008-07-28 14:11:17 -0400
1166 changes by Arthur David Olson and Jesper Norgaard Welen
1169 Release data2008d - 2008-07-07 09:51:38 -0400
1171 changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo
1174 Release data2008c - 2008-05-19 17:48:03 -0400
1176 Pakistan, Morocco, and Mongolia
1179 Release data2008b - 2008-03-24 08:30:59 -0400
1181 including renaming Asia/Calcutta to Asia/Kolkata, with a backward
1185 Release 2008a - 2008-03-08 05:42:16 -0500
1190 Release 2007k - 2007-12-31 10:25:22 -0500
1192 most importantly, changes to the "southamerica" file based on
1193 Argentina's readoption of daylight saving time
1196 Release 2007j - 2007-12-03 09:51:01 -0500
1198 1. eliminate the "P" (parameter) macro;
1200 2. the "noncontroversial" changes circulated on the time zone
1201 mailing list (less the changes to "logwtmp.c");
1203 3. eliminate "too many transition" errors when "min" is used in time
1206 4. changes by Paul Eggert (including updated information for Venezuela).
1209 Release data2007i - 2007-10-30 10:28:11 -0400
1211 changes for Cuba and Syria
1214 Release 2007h - 2007-10-01 10:05:51 -0400
1216 changes by Paul Eggert, as well as an updated link to the ICU
1217 project in tz-link.htm
1220 Release 2007g - 2007-08-20 10:47:59 -0400
1222 changes by Paul Eggert
1224 The "leapseconds" file has been updated to incorporate the most
1225 recent International Earth Rotation and Reference Systems Service
1228 There's an addition to tz-art.htm regarding the television show "Medium".
1231 Release 2007f - 2007-05-07 10:46:46 -0400
1233 changes by Paul Eggert (including Haiti, Turks and Caicos, and New
1236 changes to zic.c to allow hour values greater than 24 (along with
1237 Paul's improved time value overflow checking)
1240 Release 2007e - 2007-04-02 10:11:52 -0400
1242 Syria and Honduras changes by Paul Eggert
1244 zic.c variable renaming changes by Arthur David Olson
1247 Release 2007d - 2007-03-20 08:48:30 -0400
1249 changes by Paul Eggert
1251 the elimination of white space at the ends of lines
1254 Release 2007c - 2007-02-26 09:09:37 -0500
1256 changes by Paul Eggert
1259 Release 2007b - 2007-02-12 09:34:20 -0500
1261 Paul Eggert's proposed change to the quotation handling logic in zic.c.
1263 changes to the commentary in "leapseconds" reflecting the IERS
1264 announcement that there is to be no positive leap second at the end
1268 Release 2007a - 2007-01-08 12:28:29 -0500
1270 changes by Paul Eggert
1272 Derick Rethan's Asmara change
1274 Oscar van Vlijmen's Easter Island local mean time change
1276 symbolic link changes
1279 Release 2006p - 2006-11-27 08:54:27 -0500
1281 changes by Paul Eggert
1284 Release 2006o - 2006-11-06 09:18:07 -0500
1286 changes by Paul Eggert
1289 Release 2006n - 2006-10-10 11:32:06 -0400
1291 changes by Paul Eggert
1294 Release 2006m - 2006-10-02 15:32:35 -0400
1296 changes for Uruguay, Palestine, and Egypt by Paul Eggert
1298 (minimalist) changes to zic.8 to clarify "until" information
1301 Release data2006l - 2006-09-18 12:58:11 -0400
1303 Paul's best-effort work on this coming weekend's Egypt time change
1306 Release 2006k - 2006-08-28 12:19:09 -0400
1308 changes by Paul Eggert
1311 Release 2006j - 2006-08-21 09:56:32 -0400
1313 changes by Paul Eggert
1316 Release code2006i - 2006-08-07 12:30:55 -0400
1320 Ken Pizzini's conversion script
1323 Release code2006h - 2006-07-24 09:19:37 -0400
1325 adds public domain notices to four files
1327 includes a fix for transition times being off by a second
1329 adds a new recording to the "arts" file (information courtesy Colin Bowern)
1332 Release 2006g - 2006-05-08 17:18:09 -0400
1334 northamerica changes by Paul Eggert
1337 Release 2006f - 2006-05-01 11:46:00 -0400
1339 a missing version number problem is fixed (with thanks to Bradley
1340 White for catching the problem)
1343 Release 2006d - 2006-04-17 14:33:43 -0400
1345 changes by Paul Eggert
1347 added new items to tz-arts.htm that were found by Paul
1350 Release 2006c - 2006-04-03 10:09:32 -0400
1352 two sets of data changes by Paul Eggert
1354 a fencepost error fix in zic.c
1356 changes to zic.c and the "europe" file to minimize differences
1357 between output produced by the old 32-bit zic and the new 64-bit
1361 Release 2006b - 2006-02-20 10:08:18 -0500
1362 [tz32code2006b + tz64code2006b + tzdata2006b]
1366 All SCCS IDs were bumped to "8.1" for this release.
1369 Release 2006a - 2006-01-30 08:59:31 -0500
1371 changes by Paul Eggert (in particular, Indiana time zone moves)
1373 an addition to the zic manual page to describe how special-case
1374 transitions are handled
1377 Release 2005r - 2005-12-27 09:27:13 -0500
1379 Canadian changes by Paul Eggert
1381 They also add "<pre>" directives to time zone data files and reflect
1382 changes to warning message logic in "zdump.c" (but with calls to
1383 "gettext" kept unbundled at the suggestion of Ken Pizzini).
1386 Release 2005q - 2005-12-13 09:17:09 -0500
1388 Nothing earth-shaking here:
1389 1. Electronic mail addresses have been removed.
1390 2. Casts of the return value of exit have been removed.
1391 3. Casts of the argument of is.* macros have been added.
1392 4. Indentation in one section of zic.c has been fixed.
1393 5. References to dead URLs in the data files have been dealt with.
1396 Release 2005p - 2005-12-05 10:30:53 -0500
1398 "systemv", "tz-link.htm", and "zdump.c" changes
1399 (less the casts of arguments to the is* macros)
1402 Release 2005o - 2005-11-28 10:55:26 -0500
1404 Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert
1406 zdump.c lint fixes by Arthur David Olson
1409 Release 2005n - 2005-10-03 09:44:09 -0400
1411 changes by Paul Eggert (both the Uruguary changes and the Kyrgyzstan
1415 Release 2005m - 2005-08-29 12:15:40 -0400
1417 changes by Paul Eggert (with a small tweak to the tz-art change)
1419 a declaration of an unused variable has been removed from zdump.c
1422 Release 2005l - 2005-08-22 12:06:39 -0400
1424 changes by Paul Eggert
1426 overflow/underflow checks by Arthur David Olson, minus changes to
1427 the "Theory" file about the pending addition of 64-bit data (I grow
1428 less confident of the changes being accepted with each passing day,
1429 and the changes no longer increase the data files nine-fold--there's
1430 less than a doubling in size by my local Sun's reckoning)
1433 Release 2005k - 2005-07-14 14:14:24 -0400
1435 The "leapseconds" file has been edited to reflect the recently
1436 announced leap second at the end of 2005.
1438 I've also deleted electronic mail addresses from the files as an
1442 Release 2005j - 2005-06-13 14:34:13 -0400
1444 These reflect changes to limit the length of time zone abbreviations
1445 and the characters used in those abbreviations.
1447 There are also changes to handle POSIX-style "quoted" time zone
1448 environment variables.
1450 The changes were circulated on the time zone mailing list; the only
1451 change since then was the removal of a couple of minimum-length of
1452 abbreviation checks.
1455 Release data2005i - 2005-04-21 15:04:16 -0400
1457 changes (most importantly to Nicaragua and Haiti) by Paul Eggert
1460 Release 2005h - 2005-04-04 11:24:47 -0400
1462 changes by Paul Eggert
1464 minor changes to Makefile and zdump.c to produce more useful output
1465 when doing a "make typecheck"
1468 Release 2005g - 2005-03-14 10:11:21 -0500
1470 changes by Paul Eggert (a change to current DST rules in Uruguay and
1471 an update to a link to time zone software)
1474 Release 2005f - 2005-03-01 08:45:32 -0500
1476 data and documentation changes by Paul Eggert
1479 Release 2005e - 2005-02-10 15:59:44 -0500
1484 Release code2005d - 2005-01-31 09:21:47 -0500
1486 make zic complain about links to links if the -v flag is used
1488 have "make public" do more code checking
1490 add an include to "localtime.c" for the benefit of gcc systems
1493 Release 2005c - 2005-01-17 18:36:29 -0500
1495 get better results when mktime runs on a system where time_t is double
1497 changes to the data files (most importantly to Paraguay)
1500 Release 2005b - 2005-01-10 09:19:54 -0500
1502 Get localtime and gmtime working on systems with exotic time_t types.
1504 Update the leap second commentary in the "leapseconds" file.
1507 Release 2005a - 2005-01-01 13:13:44 -0500
1512 Release code2004i - 2004-12-14 13:42:58 -0500
1514 Deal with systems where time_t is unsigned.
1517 Release code2004h - 2004-12-07 11:40:18 -0500
1519 64-bit-time_t changes
1522 Release 2004g - 2004-11-02 09:06:01 -0500
1524 update to Cuba (taking effect this weekend)
1526 other changes by Paul Eggert
1528 correction of the spelling of Oslo
1530 changed versions of difftime.c and private.h
1533 Release code2004f - 2004-10-21 10:25:22 -0400
1535 Cope with wide-ranging tm_year values.
1538 Release 2004e - 2004-10-11 14:47:21 -0400
1540 Brazil/Argentina/Israel changes by Paul Eggert
1542 changes to tz-link.htm by Paul
1544 one small fix to Makefile
1547 Release 2004d - 2004-09-22 08:27:29 -0400
1549 Avoid overflow problems when TM_YEAR_BASE is added to an integer.
1552 Release 2004c - 2004-08-11 12:06:26 -0400
1554 asctime-related changes
1556 (variants of) some of the documentation changes suggested by Paul Eggert
1559 Release 2004b - 2004-07-19 14:33:35 -0400
1561 data changes by Paul Eggert--most importantly, updates for Argentina
1564 Release 2004a - 2004-05-27 12:00:47 -0400
1566 changes by Paul Eggert
1568 Handle DST transitions that occur at the end of a month in some
1569 years but at the start of the following month in other years.
1571 Add a copy of the correspondence that's the basis for claims about
1572 DST in the Navajo Nation.
1575 Release 2003e - 2003-12-15 09:36:47 -0500
1577 changes by Arthur David Olson (primarily code changes)
1579 changes by Paul Eggert (primarily data changes)
1581 minor changes to "Makefile" and "northamerica" (in the latter case,
1582 optimization of the "Toronto" rules)
1585 Release 2003d - 2003-10-06 09:34:44 -0400
1587 changes by Paul Eggert
1590 Release 2003c - 2003-09-16 10:47:05 -0400
1592 Fix bad returns in zic.c's inleap function.
1593 Thanks to Bradley White for catching the problem!
1596 Release 2003b - 2003-09-16 07:13:44 -0400
1598 Add a "--version" option (and documentation) to the zic and zdump commands.
1600 changes to overflow/underflow checking in zic
1602 a localtime typo fix.
1604 Update the leapseconds and tz-art.htm files.
1607 Release 2003a - 2003-03-24 09:30:54 -0500
1609 changes by Paul Eggert
1611 a few additions and modifications to the tz-art.htm file
1614 Release 2002d - 2002-10-15 13:12:42 -0400
1616 changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab
1618 There's also a new time zone quote in "tz-art.htm".
1621 Release 2002c - 2002-04-04 11:55:20 -0500
1623 changes by Paul Eggert
1625 Change zic.c to avoid creating symlinks to files that don't exist.
1628 Release 2002b - 2002-01-28 12:56:03 -0500
1630 [These change notes are for Release 2002a, which was corrupted.
1631 2002b was a corrected version of 2002a.]
1633 changes by Paul Eggert
1635 Update the "leapseconds" file to note that there'll be no leap
1636 second at the end of June, 2002.
1638 Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone.
1640 Change to "difftime.c" to avoid sizeof problems.
1643 Release 2001d - 2001-10-09 13:31:32 -0400
1645 changes by Paul Eggert
1648 Release 2001c - 2001-06-05 13:59:55 -0400
1650 changes by Paul Eggert and Andrew Brown
1653 Release 2001b - 2001-04-05 16:44:38 -0400
1655 changes by Paul Eggert (modulo jnorgard's typo fix)
1657 tz-art.htm has been htmlified.
1660 Release 2001a - 2001-03-13 12:57:44 -0500
1662 changes by Paul Eggert
1664 An addition to the "leapseconds" file: comments with the text of the
1665 latest IERS leap second notice.
1667 Trailing white space has been removed from data file lines, and
1668 repeated spaces in "Rule Jordan" lines in the "asia" file have been
1672 Release 2000h - 2000-12-14 15:33:38 -0500
1674 changes by Paul Eggert
1676 one typo fix in the "art" file
1678 With providence, this is the last update of the millenium.
1681 Release 2000g - 2000-10-10 11:35:22 -0400
1683 changes by Paul Eggert
1685 correction of John Mackin's name submitted by Robert Elz
1687 Garry Shandling's Daylight Saving Time joke (!?!) from the recent
1688 Emmy Awards broadcast.
1691 Release 2000f - 2000-08-10 09:31:58 -0400
1693 changes by Paul Eggert
1695 Added information in "tz-art.htm" on a Seinfeld reference to DST.
1697 Error checking and messages in the "yearistype" script have been
1701 Release 2000e - 2000-07-31 09:27:54 -0400
1703 data changes by Paul Eggert
1705 a change to the default value of the defined constant HAVE_STRERROR
1707 the addition of a Dave Barry quote on DST to the tz-arts file
1710 Release 2000d - 2000-04-20 15:43:04 -0400
1712 changes to the documentation and code of strftime for C99 conformance
1714 a bug fix for date.c
1716 These are based on (though modified from) changes by Paul Eggert.
1719 Release 2000c - 2000-03-04 10:31:43 -0500
1721 changes by Paul Eggert
1724 Release 2000b - 2000-02-21 12:16:29 -0500
1726 changes by Paul Eggert and Joseph Myers
1728 modest tweaks to the tz-art.htm and tz-link.htm files
1731 Release 2000a - 2000-01-18 09:21:26 -0500
1733 changes by Paul Eggert
1735 The two hypertext documents have also been renamed.
1738 Release code1999i-data1999j - 1999-11-15 18:43:22 -0500
1740 Paul Eggert's changes
1742 additions to the "zic" manual page and the "Arts.htm" file
1745 Release code1999h-data1999i - 1999-11-08 14:55:21 -0500
1750 Release data1999h - 1999-10-07 03:50:29 -0400
1752 changes by Paul Eggert to "europe" (most importantly, fixing
1753 Lithuania and Estonia)
1756 Release 1999g - 1999-09-28 11:06:18 -0400
1758 data changes by Paul Eggert (most importantly, the change for
1759 Lebanon that buys correctness for this coming Sunday)
1761 The "code" file contains changes to "Makefile" and "checktab.awk" to
1762 allow better checking of time zone files before they are published.
1765 Release 1999f - 1999-09-23 09:48:14 -0400
1767 changes by Arthur David Olson and Paul Eggert
1770 Release 1999e - 1999-08-17 15:20:54 -0400
1772 changes circulated by Paul Eggert, although the change to handling
1773 of DST-specifying time zone names has been commented out for now
1774 (search for "XXX" in "localtime.c" for details). These files also
1775 do not make any changes to the start of DST in Brazil.
1777 In addition to Paul's changes, there are updates to "Arts.htm" and
1781 Release 1999d - 1999-03-30 11:31:07 -0500
1783 changes by Paul Eggert
1785 The Makefile's "make public" rule has also been changed to do a test
1786 compile of each individual time zone data file (which should help
1787 avoid problems such as the one we had with Nicosia).
1790 Release 1999c - 1999-03-25 09:47:47 -0500
1792 changes by Paul Eggert, most importantly the change for Chile.
1795 Release 1999b - 1999-02-01 17:51:44 -0500
1797 changes by Paul Eggert
1799 code changes (suggested by Mani Varadarajan, mani at be.com) for
1800 correct handling of symbolic links when building using a relative directory
1802 code changes to generate correct messages for failed links
1804 updates to the URLs in Arts.htm
1807 Release 1999a - 1999-01-19 16:20:29 -0500
1809 error message internationalizations and corrections in zic.c and
1810 zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz,
1814 Release code1998h-data1998i - 1998-10-01 09:56:10 -0400
1816 changes for Brazil, Chile, and Germany
1818 support for use of "24:00" in the input files for the time zone compiler
1821 Release code1998g-data1998h - 1998-09-24 10:50:28 -0400
1823 changes by Paul Eggert
1825 correction to a define in the "private.h" file
1828 Release data1998g - 1998-08-11 03:28:35 -0000
1829 [tzdata1998g.tar.gz is missing!]
1831 Lithuanian change provided by mgedmin at pub.osf.it
1833 Move creation of the GMT link with Etc/GMT to "etcetera" (from
1834 "backward") to ensure that the GMT file is created even where folks
1835 don't want the "backward" links (as suggested by Paul Eggert).
1838 Release data1998f - 1998-07-20 13:50:00 -0000
1839 [tzdata1998f.tar.gz is missing!]
1841 Update the "leapseconds" file to include the newly-announced
1842 insertion at the end of 1998.
1845 Release code1998f - 1998-06-01 10:18:31 -0400
1847 addition to localtime.c by Guy Harris
1850 Release 1998e - 1998-05-28 09:56:26 -0400
1852 The Makefile is changed to produce zoneinfo-posix rather than
1853 zoneinfo/posix, and to produce zoneinfo-leaps rather than
1856 data changes by Paul Eggert
1858 changes from Guy Harris to provide asctime_r and ctime_r
1860 A usno1998 file (substantially identical to usno1997) has been added.
1863 Release 1998d - 1998-05-14 11:58:34 -0400
1865 changes to comments (in particular, elimination of references to CIA maps).
1866 "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places
1867 where changes occur.
1870 Release 1998c - 1998-02-28 12:32:26 -0500
1872 changes by Paul Eggert (save the "French correction," on which I'll
1873 wait for the dust to settle)
1877 changes and additions to Arts.htm
1880 Release 1998b - 1998-01-17 14:31:51 -0500
1882 URL cleanups and additions
1885 Release 1998a - 1998-01-13 12:37:35 -0500
1887 changes by Paul Eggert
1890 Release code1997i-data1997k - 1997-12-29 09:53:41 -0500
1892 changes by Paul Eggert, with minor modifications from Arthur David
1893 Olson to make the files more browser friendly
1896 Release code1997h-data1997j - 1997-12-18 17:47:35 -0500
1898 minor changes to put "TZif" at the start of each time zone information file
1900 a rule has also been added to the Makefile so you can
1902 to just recompile the zone information files (rather than doing a
1903 full "make install" with its other effects).
1906 Release data1997i - 1997-10-07 08:45:38 -0400
1908 changes to Africa by Paul Eggert
1911 Release code1997g-data1997h - 1997-09-04 16:56:54 -0400
1913 corrections for Uruguay (and other locations)
1915 Arthur David Olson's simple-minded fix allowing mktime to both
1916 correctly handle leap seconds and correctly handle tm_sec values
1917 upon which arithmetic has been performed.
1920 Release code1997f-data1997g - 1997-07-19 13:15:02 -0400
1922 Paul Eggert's updates
1924 a small change to a function prototype;
1926 "Music" has been renamed "Arts.htm", htmlified, and augmented to
1927 include information on Around the World in Eighty Days.
1930 Release code1997e-data1997f - 1997-05-03 18:52:34 -0400
1932 fixes to zic's error handling
1934 changes inspired by the item circulated on Slovenia
1936 The description of Web resources has been htmlified for browsing
1939 A new piece of tz-related music has been added to the "Music" file.
1942 Release code1997d-data1997e - 1997-03-29 12:48:52 -0500
1944 Paul Eggert's latest suggestions
1947 Release code1997c-data1997d - 1997-03-07 20:37:54 -0500
1949 changes to "zic.c" to correct performance of the "-s" option
1951 a new file "usno1997"
1954 Release data1997c - 1997-03-04 09:58:18 -0500
1959 Release 1997b - 1997-02-27 18:34:19 -0500
1961 The data file incorporates the 1997 leap second.
1963 The code file incorporates Arthur David Olson's take on the
1964 zic/multiprocessor/directory-creation situation.
1967 Release 1997a - 1997-01-21 09:11:10 -0500
1969 Paul Eggert's Antarctica (and other changes)
1971 Arthur David Olson finessed the "getopt" issue by checking against
1972 both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1
1973 is returned while SunOS 5.5's manual says EOF is returned).
1976 Release code1996o-data1996n - 1996-12-27 21:42:05 -0500
1978 Paul Eggert's latest changes
1981 Release code1996n - 1996-12-16 09:42:02 -0500
1983 link snapping fix from Bruce Evans (via Garrett Wollman)
1986 Release data1996m - 1996-11-24 02:37:34 -0000
1987 [tzdata1996m.tar.gz is missing!]
1989 Paul Eggert's batch of changes
1992 Release code1996m-data1996l - 1996-11-05 14:00:12 -0500
1994 No functional changes here; the files have simply been changed to
1995 make more use of ISO style dates in comments. The names of the above
1996 files now include the year in full.
1999 Release code96l - 1996-09-08 17:12:20 -0400
2001 tzcode96k was missing a couple of pieces.
2004 Release 96k - 1996-09-08 16:06:22 -0400
2006 the latest round of changes from Paul Eggert
2008 the recent Year 2000 material
2011 Release code96j - 1996-07-30 13:18:53 -0400
2013 Set sp->typecnt as suggested by Timothy Patrick Murphy.
2016 Release code96i - 1996-07-27 20:11:35 -0400
2018 Paul's suggested patch for strftime %V week numbers
2021 Release data96i - 1996-07-01 18:13:04 -0400
2023 "northamerica" and "europe" changes by Paul Eggert
2026 Release code96h - 1996-06-05 08:02:21 -0400
2028 fix for handling transitions specified in Universal Time
2030 Some "public domain" notices have also been added.
2033 Release code96g - 1996-05-16 14:00:26 -0400
2035 fix for the simultaneous-DST-and-zone-change challenge
2038 Release data96h - 1996-05-09 17:40:51-0400
2040 changes by Paul Eggert
2043 Release code96f-data96g - 1996-05-03 03:09:59 -0000
2044 [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!]
2046 The changes get us some of the way to fixing the problems noted in Paul
2047 Eggert's letter yesterday (in addition to a few others). The approach
2048 has been to make zic a bit smarter about figuring out what time zone
2049 abbreviations apply just after the time specified in the "UNTIL" part
2050 of a zone line. Putting the smarts in zic means avoiding having
2051 transition times show up in both "Zone" lines and "Rule" lines, which
2052 in turn avoids multiple transition time entries in time zone files.
2053 (This also makes the zic input files such as "europe" a bit shorter and
2054 should ease maintenance.)
2057 Release data96f - 1996-04-19 19:20:03 -0000
2058 [tzdata96f.tar.gz is missing!]
2060 The only changes are to the "northamerica" file; the time zone
2061 abbreviation for Denver is corrected to MST (and MDT), and the
2062 comments for Mexico have been updated.
2065 Release data96e - 1996-03-19 17:37:26 -0500
2067 Proposals by Paul Eggert, in particular the Portugal change that
2068 comes into play at the end of this month.
2071 Release data96d - 1996-03-18 20:49:39 -0500
2076 Release code96e - 1996-02-29 15:43:27 -0000
2077 [tzcode96e.tar.gz is missing!]
2079 internationalization changes and the fix to the documentation for strftime
2082 Release code96d-data96c - 1996-02-12 11:05:27 -0500
2084 The "code" file simply updates Bob Kridle's electronic address.
2086 The "data" file updates rules for Mexico.
2089 Release data96b - 1996-01-27 15:44:42 -0500
2094 Release code96c - 1996-01-16 16:58:15-0500
2096 leap-year streamlining and binary-search changes
2101 Release code96b - 1996-01-10 20:42:39 -0500
2103 fixes and enhancements from Paul Eggert, including code that
2104 emulates the behavior of recent versions of the SunOS "date"
2108 Release 96a - 1996-01-06 09:08:24 -0500
2112 fixes to strftime.c for correct ISO 8601 week number generation,
2113 plus support for two new formats ('G' and 'g') to give ISO 8601 year
2114 numbers (which are not necessarily the same as calendar year numbers)
2117 Release code95i-data95m - 1995-12-21 12:46:47 -0500
2119 The latest revisions from Paul Eggert are included, the usno1995
2120 file has been updated, and a new file ("WWW") covering useful URLs
2124 Release code95h-data95l - 1995-12-19 18:10:12 -0500
2126 A simplification of a macro definition, a change to data for Sudan,
2127 and (for last minute shoppers) notes in the "Music" file on the CD
2131 Release code95g-data95k - 1995-10-30 10:32:47 -0500
2133 (slightly reformatted) 8-bit-clean proposed patch
2135 minor patch: US/Eastern -> America/New_York
2137 snapshot of the USNO's latest data ("usno1995")
2139 some other minor cleanups
2142 Release code95f-data95j - 1995-10-28 21:01:34 -0000
2143 [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!]
2147 support for 64-bit time_t's
2149 optimization in localtime.c
2152 Release code95e - 1995-10-13 13:23:57 -0400
2154 the mktime change to scan from future to past when trying to find time zone
2158 Release data95i - 1995-09-26 10:43:26 -0400
2160 For Canada/Central, guess that the Sun customer's ``one week too
2161 early'' was just a approximation, and the true error is one month
2162 too early. This is consistent with the rest of Canada.
2165 Release data95h - 1995-09-21 11:26:48 -0400
2167 latest changes from Paul Eggert
2170 Release code95d - 1995-09-14 11:14:45 -0400
2172 the addition of a "Music" file, which documents four recorded
2173 versions of the tune "Save That Time".
2176 Release data95g - 1995-09-01 17:21:36 -0400
2178 "yearistype" correction
2181 Release data95f - 1995-08-28 20:46:56 -0400
2183 Paul Eggert's change to the australasia file
2186 Release data95e - 1995-07-08 18:02:34 -0400
2188 The only change is a leap second at the end of this year.
2189 Thanks to Bradley White for forwarding news on the leap second.
2192 Release data95d - 1995-07-03 13:26:22 -0400
2194 Paul Eggert's changes
2197 Release data95c - 1995-07-02 19:19:28 -0400
2199 changes to "asia", "backward", "europe", and "southamerica"
2200 (read: northamericacentrics need not apply)
2203 Release code95c - 1995-03-13 14:00:46 -0500
2205 one-line fix for sign extension problems in detzcode
2208 Release 95b - 1995-03-04 11:22:38 -0500
2210 Minor changes in both:
2212 The "code" file contains a workaround for the lack of "unistd.h" in
2213 Microsoft C++ version 7.
2215 The "data" file contains a fixed "Link" for America/Shiprock.
2218 Release 94h - 1994-12-10 12:51:14 -0500
2222 * incorporate the changes to "zdump" and "date" to make changes to
2223 the "TZ" environment variable permanent;
2225 * incorporate the table changes by Paul Eggert;
2227 * include (and document) support for universal time specifications in
2228 data files--but do not (yet) include use of this feature in the
2231 Think of this as "TZ Classic"--the software has been set up not to break if
2232 universal time shows up in its input, and the data has been left as is so as
2233 not to break existing implementations.
2236 Release data94f - 1994-08-20 12:56:09 -0400
2238 (with thanks!) the latest data updates from Paul Eggert
2241 Release data94e - 1994-06-04 13:13:53 -0400
2246 Release code94g - 1994-05-05 12:14:07 -0400
2248 fix missing "optind.c" and a reference to it in the Makefile
2251 Release code94f - 1994-05-05 13:00:33 -0000
2252 [tzcode94f.tar.gz is missing!]
2254 changes to avoid overflow in difftime, as well as changes to cope
2255 with the 52/53 challenge in strftime
2258 Release code94e - 1994-03-30 23:32:59 -0500
2260 change for the benefit of PCTS
2263 Release 94d - 1994-02-24 15:42:25 -0500
2265 Avoid clashes with POSIX semantics for zones such as GMT+4.
2267 Some other very minor housekeeping is also present.
2270 Release code94c - 1994-02-10 08:52:40 -0500
2272 Fix bug where mkdirs was broken unless you compile with
2273 -fwritable-strings (which is generally losing to do).
2276 Release 94b - 1994-02-07 10:04:33 -0500
2278 work by Paul Eggert who notes:
2280 I found another book of time zone histories by E W Whitman; it's not
2281 as extensive as Shanks but has a few goodies of its own. I used it
2282 to update the tables. I also fixed some more as a result of
2283 correspondence with Adam David and Peter Ilieve, and move some stray
2284 links from `europe' to `backward'. I corrected some scanning errors
2287 As far as the code goes, I fixed zic to allow years in the range
2288 INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900.
2289 And I cleaned up the zic documentation a little bit.
2292 Release data94a - 1994-02-03 08:58:54 -0500
2294 It simply incorporates the recently announced leap second into the
2298 Release 93g - 1993-11-22 17:28:27 -0500
2300 Paul Eggert has provided a good deal of historic information (based
2301 on Shanks), and there are some code changes to deal with the buglets
2302 that crawled out in dealing with the new information.
2305 Release 93f - 1993-10-15 12:27:46 -0400
2307 Paul Eggert's changes
2310 Release 93e - 1993-09-05 21:21:44 -0400
2312 There's updated data for Israel, England, and Kwajalein; there's
2313 also an update to "zdump" to cope with Kwajalein's 24-hour jump.
2314 Thanks to Paul Eggert and Peter Ilieve for the changes.
2317 Release 93d - 1993-06-17 23:34:17 -0400
2319 new fix and new data on Israel
2322 Release 93c - 1993-06-06 19:31:55 -0400
2327 Release 93b - 1993-02-02 14:53:58 -0500
2329 updated "leapseconds" file
2332 Release 93 - 1993-01-08 07:01:06 -0500
2334 At kre's suggestion, the package has been split in two--a code piece
2335 (which also includes documentation) that's only of use to folks who
2336 want to recompile things and a data piece useful to anyone who can
2339 The new version has a few changes to the data files, a few
2340 portability changes, and an off-by-one fix (with thanks to
2341 Tom-Karzes at deshaw.com for providing a description and a
2345 Release 92c - 1992-11-21 17:35:36 -0000
2346 [tz92c.tar.Z is missing!]
2348 The fallout from the latest round of DST transitions.
2350 There are changes for Portugal, Saskatchewan, and "Pacific-New";
2351 there's also a change to "zic.c" that makes it portable to more systems.
2354 Release 92 - 1992-04-25 18:17:03 -0000
2355 [tz92.tar.Z is missing!]
2357 By popular demand (well, at any rate, following a request by kre at munnari)
2360 The 1989 update of the time zone package featured:
2362 * POSIXization (including interpretation of POSIX-style TZ environment
2363 variables, provided by Guy Harris),
2364 * ANSIfication (including versions of "mktime" and "difftime"),
2365 * SVIDulation (an "altzone" variable)
2366 * MACHination (the "gtime" function)
2367 * corrections to some time zone data (including corrections to the rules
2368 for Great Britain and New Zealand)
2369 * reference data from the United States Naval Observatory for folks who
2370 want to do additional time zones
2371 * and the 1989 data for Saudi Arabia.
2373 (Since this code will be treated as "part of the implementation" in some
2374 places and as "part of the application" in others, there's no good way to
2375 name functions, such as timegm, that are not part of the proposed ANSI C
2376 standard; such functions have kept their old, underscore-free names in this
2379 And the "dysize" function has disappeared; it was present to allow
2380 compilation of the "date" command on old BSD systems, and a version of "date"
2381 is now provided in the package. The "date" command is not created when you
2382 "make all" since it may lack options provided by the version distributed with
2383 your operating system, or may not interact with the system in the same way
2384 the native version does.
2386 Since POSIX frowns on correct leap second handling, the default behavior of
2387 the "zic" command (in the absence of a "-L" option) has been changed to omit
2388 leap second information from its output files.
2394 This file contains copies of the part of each release announcement
2395 that talks about the changes in that release. The text has been
2396 adapted and reformatted for the purposes of this file.
2398 Typically a release R consists of a pair of tarball files,
2399 tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g.,
2400 code2010a, data2012c) consist of just one or the other tarball, and a
2401 few (e.g., code2012c-data2012d) have tarballs with mixed version
2404 Release time stamps are taken from the release's commit (for newer,
2405 git releases), from the newest file in the tarball (for older
2406 releases, where this info is available) or from the email announcing
2407 the release (if all else fails; these are marked with a timezone of
2408 -0000 and an "is missing!" comment).
2410 Earlier versions of the code and data were not announced on the tz
2411 list and are not summarized here.
2413 This file is in the public domain.