NEWS revision 1.6 
1News for the tz database
2
3Release 2014h - 2014-09-25 18:59:03 -0700
4
5  Changes affecting past time stamps
6
7    America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28.
8
9    Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01,
10    not 1920-01-06.  The old entry was based on a misinterpretation of Shanks.
11
12    Some more zones have been turned into links, when they differed
13    from existing zones only for older time stamps.  As usual,
14    these changes affect UTC offsets in pre-1970 time stamps only.
15    Their old contents have been moved to the 'backzone' file.
16    The affected zones are: Africa/Blantyre, Africa/Bujumbura,
17    Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
18    Africa/Lusaka, Africa/Maseru, and Africa/Mbabane.
19
20  Changes affecting code
21
22    zdump -V and -v now output gmtoff= values on all platforms,
23    not merely on platforms defining TM_GMTOFF.
24
25    The tz library's localtime and mktime functions now set tzname to a value
26    appropriate for the requested time stamp, and zdump now uses this
27    on platforms not defining TM_ZONE, fixing a 2014g regression.
28    (Thanks to Tim Parenti for reporting the problem.)
29
30    The tz library no longer sets tzname if localtime or mktime fails.
31
32    zdump -c no longer mishandles transitions near year boundaries.
33    (Thanks to Tim Parenti for reporting the problem.)
34
35    An access to uninitalized data has been fixed.
36    (Thanks to Jörg Richter for reporting the problem.)
37
38    When THREAD_SAFE is defined, the code ports to the C11 memory model.
39    A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined
40    and two threads race to initialize data used by gmtime-like functions.
41    (Thanks to Andy Heninger for reporting the problems.)
42
43  Changes affecting build procedure
44
45    'make check' now checks better for properly-sorted data.
46
47  Changes affecting documentation and commentary
48
49    zdump's gmtoff=N output is now documented, and its isdst=D output
50    is now documented to possibly output D values other than 0 or 1.
51
52    zdump -c's treatment of years is now documented to use the
53    Gregorian calendar and Universal Time without leap seconds,
54    and its behavior at cutoff boundaries is now documented better.
55    (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.)
56
57    Programs are now documented to use the proleptic Gregorian calendar.
58    (Thanks to Alan Barrett for the suggestion.)
59
60    Fractional-second GMT offsets have been documented for civil time
61    in 19th-century Chennai, Jakarta, and New York.
62
63
64Release 2014g - 2014-08-28 12:31:23 -0700
65
66  Changes affecting future time stamps
67
68    Turks & Caicos is switching from US eastern time to UTC-4 year-round,
69    modeled as a switch from EST/EDT to AST on 2014-11-02 at 02:00.
70
71  Changes affecting past time stamps
72
73    Time in Russia or the USSR before 1926 or so has been corrected by
74    a few seconds in the following zones: Asia/Irkutsk,
75    Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi,
76    Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara.  For
77    Asia/Yekaterinburg the correction is a few minutes.  (Thanks to
78    Vladimir Karpinsky.)
79
80    The Portuguese decree of 1911-05-26 took effect on 1912-01-01.
81    This affects 1911 time stamps in Africa/Bissau, Africa/Luanda,
82    Atlantic/Azores, and Atlantic/Madeira.  Also, Lisbon's pre-1912
83    GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32.
84    (Thanks to Stephen Colebourne for pointing to the decree.)
85
86    Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59.
87
88    A new file 'backzone' contains data which may appeal to
89    connoisseurs of old time stamps, although it is out of scope for
90    the tz database, is often poorly sourced, and contains some data
91    that is known to be incorrect.  The new file is not recommended
92    for ordinary use and its entries are not installed by default.
93    (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and
94    Isle of Man entries.)
95
96    Some more zones have been turned into links, when they differed
97    from existing zones only for older time stamps.  As usual,
98    these changes affect UTC offsets in pre-1970 time stamps only.
99    Their old contents have been moved to the 'backzone' file.
100    The affected zones are: Africa/Bangui, Africa/Brazzaville,
101    Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda,
102    Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo.
103
104  Changes affecting code
105
106    Unless NETBSD_INSPIRED is defined to 0, the tz library now
107    supplies functions for creating and using objects that represent
108    time zones. The new functions are tzalloc, tzfree, localtime_rz,
109    mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and
110    time2posix_z.  They are intended for performance: for example,
111    localtime_rz (unlike localtime_r) is trivially thread-safe without
112    locking.  (Thanks to Christos Zoulas for proposing NetBSD-inspired
113    functions, and to Alan Barrett and Jonathan Lennox for helping to
114    debug the change.)
115
116    zdump now builds with the tz library unless USE_LTZ is defined to 0,
117    This lets zdump use tz features even if the system library lacks them.
118    To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0
119    TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='.
120
121    zdump now uses localtime_rz if available, as it's significantly faster,
122    and it can help zdump better diagnose invalid time zone names.
123    Define HAVE_LOCALTIME_RZ to 0 to suppress this.  HAVE_LOCALTIME_RZ
124    defaults to 1 if NETBSD_INSPIRED && USE_LTZ.  When localtime_rz is
125    not available, zdump now uses localtime_r and tzset if available,
126    as this is a bit cleaner and faster than plain localtime.  Compile
127    with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system
128    lacks these two functions.
129
130    If THREAD_SAFE is defined to 1, the tz library is now thread-safe.
131    Although not needed for tz's own applications, which are single-threaded,
132    this supports POSIX better if the tz library is used in multithreaded apps.
133
134    Some crashes have been fixed when zdump or the tz library is given
135    invalid or outlandish input.
136
137    The tz library no longer mishandles leap seconds on platforms with
138    unsigned time_t in time zones that lack ordinary transitions after 1970.
139
140    The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not
141    already defined, to make it easier to configure on common platforms.
142    Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this.
143
144    Unless the new macro UNINIT_TRAP is defined to 1, the tz code now
145    assumes that reading uninitialized memory yields garbage values
146    but does not cause other problems such as traps.
147
148    If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now
149    more likely to guess right for ambiguous time stamps near
150    transitions where tm_isdst does not change.
151
152    If HAVE_STRFTIME_L is defined to 1, the tz library now defines
153    strftime_l for compatibility with recent versions of POSIX.
154    Only the C locale is supported, though.  HAVE_STRFTIME_L defaults
155    to 1 on recent POSIX versions, and to 0 otherwise.
156
157    tzselect -c now uses a hybrid distance measure that works better
158    in Africa.  (Thanks to Alan Barrett for noting the problem.)
159
160    The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used,
161    or when time_tz is defined.
162
163    When HAVE_UTMPX_H is set the 'date' command now builds on systems
164    whose <utmpx.h> file does not define WTMPX_FILE, and when setting
165    the date it updates the wtmpx file if _PATH_WTMPX is defined.
166    This affects GNU/Linux and similar systems.
167
168    For easier maintenance later, some C code has been simplified,
169    some lint has been removed, and the code has been tweaked so that
170    plain 'make' is more likely to work.
171
172    The C type 'bool' is now used for boolean values, instead of 'int'.
173
174    The long-obsolete LOCALE_HOME code has been removed.
175
176    The long-obsolete 'gtime' function has been removed.
177
178  Changes affecting build procedure
179
180    'zdump' no longer links in ialloc.o, as it's not needed.
181
182    'make check_time_t_alternatives' no longer assumes GNU diff.
183
184  Changes affecting distribution tarballs
185
186    The files checktab.awk and zoneinfo2tdf.pl are now distributed in
187    the tzdata tarball instead of the tzcode tarball, since they help
188    maintain the data.  The NEWS and Theory files are now also
189    distributed in the tzdata tarball, as they're relevant for data.
190    (Thanks to Alan Barrett for pointing this out.)  Also, the
191    leapseconds.awk file is no longer distributed in the tzcode
192    tarball, since it belongs in the tzdata tarball (where 2014f
193    inadvertently also distributed it).
194
195  Changes affecting documentation and commentary
196
197    A new file CONTRIBUTING is distributed.  (Thanks to Tim Parenti for
198    suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms
199    for debugging it.)
200
201    The man pages have been updated to use function prototypes,
202    to document thread-safe variants like localtime_r, and to document
203    the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and
204    mktime_z.
205
206    The fields in Link lines have been renamed to be more descriptive
207    and more like the parameters of 'ln'.  LINK-FROM has become TARGET,
208    and LINK-TO has become LINK-NAME.
209
210    tz-link.htm mentions the IETF's tzdist working group; Windows
211    Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab.
212
213    Some broken URLs have been fixed in the commentary.  (Thanks to
214    Lester Caine.)
215
216    Commentary about Philippines DST has been updated, and commentary
217    on pre-1970 time in India has been added.
218
219
220Release 2014f - 2014-08-05 17:42:36 -0700
221
222  Changes affecting future time stamps
223
224    Russia will subtract an hour from most of its time zones on 2014-10-26
225    at 02:00 local time.  (Thanks to Alexander Krivenyshev.)
226    There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky
227    Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug
228    (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast
229    (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic
230    (Europe/Samara) are not changing their clocks.  The changed zones are
231    Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd,
232    Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk,
233    Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga,
234    Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours
235    subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected,
236    but not its UTC offset.  Two zones are added: Asia/Chita (split
237    from Asia/Yakutsk, and also with two hours subtracted) and
238    Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour
239    subtracted).  (Thanks to Tim Parenti for much of the above.)
240
241  Changes affecting time zone abbreviations
242
243    Australian eastern time zone abbreviations are now AEST/AEDT not EST,
244    and similarly for the other Australian zones.  That is, for eastern
245    standard and daylight saving time the abbreviations are AEST and AEDT
246    instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT,
247    and AWST/AWDT are now used instead of the former CST, CWST, and WST.
248    This change does not affect UTC offsets, only time zone abbreviations.
249    (Thanks to Rich Tibbett and many others.)
250
251    Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UTC+7)
252    effective 2014-10-26 at 02:00 local time.
253
254    The time zone abbreviation for Xinjiang Time (observed in Ürümqi)
255    has been changed from URUT to XJT.  (Thanks to Luther Ma.)
256
257    Prefer MSK/MSD for Moscow time in Russia, even in other cities.
258    Similarly, prefer EET/EEST for eastern European time in Russia.
259
260    Change time zone abbreviations in (western) Samoa to use "ST" and
261    "DT" suffixes, as this is more likely to match common practice.
262    Prefix "W" to (western) Samoa time when its standard-time offset
263    disagrees with that of American Samoa.
264
265    America/Metlakatla now uses PST, not MeST, to abbreviate its time zone.
266
267    Time zone abbreviations have been updated for Japan's two time
268    zones used 1896-1937.  JWST now stands for Western Standard
269    Time, and JCST for Central Standard Time (formerly this was CJT).
270    These abbreviations are now used for time in Korea, Taiwan,
271    and Sakhalin while controlled by Japan.
272
273  Changes affecting past time stamps
274
275    China's five zones have been simplified to two, since the post-1970
276    differences in the other three seem to have been imaginary.  The
277    zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been
278    removed; backwards-compatibility links still work, albeit with
279    different behaviors for time stamps before May 1980.  Asia/Urumqi's
280    1980 transition to UTC+8 has been removed, so that it is now at
281    UTC+6 and not UTC+8.  (Thanks to Luther Ma and to Alois Treindl;
282    Treindl sent helpful translations of two papers by Guo Qingsheng.)
283
284    Some zones have been turned into links, when they differed from existing
285    zones only for older UTC offsets where data entries were likely invented.
286    These changes affect UTC offsets in pre-1970 time stamps only.  This is
287    similar to the change in release 2013e, except this time for western
288    Africa.  The affected zones are: Africa/Bamako, Africa/Banjul,
289    Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome,
290    Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and
291    Atlantic/St_Helena.  This also affects the backwards-compatibility
292    link Africa/Timbuktu.  (Thanks to Alan Barrett, Stephen Colebourne,
293    Tim Parenti, and David Patte for reporting problems in earlier
294    versions of this change.)
295
296    Asia/Shanghai's pre-standard-time UT offset has been changed from
297    8:05:57 to 8:05:43, the location of Xujiahui Observatory.  Its
298    transition to standard time has been changed from 1928 to 1901.
299
300    Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01,
301    then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945.
302    In 1946 it observed DST from 05-15 through 09-30; in 1947
303    from 04-15 through 10-31; and in 1979 from 07-01 through 09-30.
304    (Thanks to Yu-Cheng Chuang.)
305
306    Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950.
307
308    Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not
309    10-03 at 00:00.  (Thanks to Konstantin Hyppönen.)
310
311    Pacific/Pago_Pago has been changed from UTC-11:30 to UTC-11 for the period
312    from 1911 to 1950.
313
314    Pacific/Chatham has been changed to New Zealand standard time plus
315    45 minutes for the period before 1957, reflecting a 1956 remark in
316    the New Zealand parliament.
317
318    Europe/Budapest has several pre-1946 corrections: in 1918 the transition
319    out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in
320    1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08
321    not 04-06 at 02:00; and there was no DST in 1920.
322
323    Africa/Accra is now assumed to have observed DST from 1920 through 1935.
324
325    Time in Russia before 1927 or so has been corrected by a few seconds in
326    the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi,
327    Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and
328    Europe/Riga.  Also, Moscow's location has been changed to its Kilometer 0
329    point.  (Thanks to Vladimir Karpinsky for the Moscow changes.)
330
331  Changes affecting data format
332
333    A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data.
334    The new file's extended format allows multiple country codes per zone.
335    The older file is still installed but is deprecated; its format is
336    not changing and it will still be distributed for a while, but new
337    applications should use the new file.
338
339    The new file format simplifies maintenance of obscure locations.
340    To test this, it adds coverage for the Crozet Islands and the
341    Scattered Islands.  (Thanks to Tobias Conradi and Antoine Leca.)
342
343    The file 'iso3166.tab' is planned to switch from ASCII to UTF-8.
344    It is still ASCII now, but commentary about the switch has been added.
345    The new file 'zone1970.tab' already uses UTF-8.
346
347  Changes affecting code
348
349    'localtime', 'mktime', etc. now use much less stack space if ALL_STATE
350    is defined.  (Thanks to Elliott Hughes for reporting the problem.)
351
352    'zic' no longer mishandles input when ignoring case in locales that
353    are not compatible with English, e.g., unibyte Turkish locales when
354    compiled with HAVE_GETTEXT.
355
356    Error diagnostics of 'zic' and 'yearistype' have been reworded so that
357    they no longer use ASCII '-' as if it were a dash.
358
359    'zic' now rejects output file names that contain '.' or '..' components.
360    (Thanks to Tim Parenti for reporting the problem.)
361
362    'zic -v' now warns about output file names that do not follow
363    POSIX rules, or that contain a digit or '.'.  (Thanks to Arthur
364    David Olson for starting the ball rolling on this.)
365
366    Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0.
367
368  Changes affecting build procedure
369
370    'zic' no longer links in localtime.o and asctime.o, as they're not needed.
371    (Thanks to John Cochran.)
372
373  Changes affecting documentation and commentary
374
375    The 'Theory' file documents legacy names, the longstanding
376    exceptions to the POSIX-inspired file name rules.
377
378    The 'zic' documentation clarifies the role of time types when
379    interpreting dates.  (Thanks to Arthur David Olson.)
380
381    Documentation and commentary now prefer UTF-8 to US-ASCII,
382    allowing the use of proper accents in foreign words and names.
383    Code and data have not changed because of this.  (Thanks to
384    Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug
385    this.)
386
387    Non-HTML documentation and commentary now use plain-text URLs instead of
388    HTML insertions, and are more consistent about bracketing URLs when they
389    are not already surrounded by white space.  (Thanks to suggestions by
390    Steffen Nurpmeso.)
391
392    There is new commentary about Xujiahui Observatory, the five time-zone
393    project in China from 1918 to 1949, timekeeping in Japanese-occupied
394    Shanghai, and Tibet Time in the 1950s.  The sharp-eyed can spot the
395    warlord Jin Shuren in the data.
396
397    Commentary about the coverage of each Russian zone has been standardized.
398    (Thanks to Tim Parenti).
399
400    There is new commentary about contemporary timekeeping in Ethiopia.
401
402    Obsolete comments about a 2007 proposal for DST in Kuwait has been removed.
403
404    There is new commentary about time in Poland in 1919.
405
406    Proper credit has been given to DST inventor George Vernon Hudson.
407
408    Commentary about time in Metlakatla, AK and Resolute, NU has been
409    improved, with a new source for the former.
410
411    In zone.tab, Pacific/Easter no longer mentions Salas y Gómez, as it
412    is uninhabited.
413
414    Commentary about permanent Antarctic bases has been updated.
415
416    Several typos have been corrected.  (Thanks to Tim Parenti for
417    contributing some of these fixes.)
418
419    tz-link.htm now mentions the JavaScript libraries Moment Timezone,
420    TimezoneJS.Date, Walltime-js, and Timezone.  (Thanks to a heads-up
421    from Matt Johnson.)  Also, it mentions the Go 'latlong' package.
422    (Thanks to a heads-up from Dirkjan Ochtman.)
423
424    The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998
425    have been removed.  These obsolescent US Naval Observatory entries were no
426    longer helpful for maintenance.  (Thanks to Tim Parenti for the suggestion.)
427
428
429Release 2014e - 2014-06-12 21:53:52 -0700
430
431  Changes affecting near-future time stamps
432
433    Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00.
434    (Thanks to Imed Chihi.)  Guess that from 2015 on Egypt will temporarily
435    switch to standard time at 24:00 the last Thursday before Ramadan, and
436    back to DST at 00:00 the first Friday after Ramadan.
437
438    Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00.  (Thanks
439    to Milamber Space Network.)  Guess that from 2015 on Morocco will
440    temporarily switch to standard time at 03:00 the last Saturday before
441    Ramadan, and back to DST at 02:00 the first Saturday after Ramadan.
442
443  Changes affecting past time stamps
444
445    The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of
446    "MSD" for Moscow's double daylight time in summer 1921.  Also, a typo
447    "VLASST" has been repaired to be "VLAST" for Vladivostok summer time
448    in 1991.  (Thanks to Hank W. for reporting the problems.)
449
450  Changes affecting commentary
451
452    tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the
453    draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and
454    removes stale pointers to World Time Explorer and WORLDTIME.
455
456
457Release 2014d - 2014-05-27 21:34:40 -0700
458
459  Changes affecting code
460
461    zic no longer generates files containing time stamps before the Big Bang.
462    This works around GNOME bug 730332
463    <https://bugzilla.gnome.org/show_bug.cgi?id=730332>.
464    (Thanks to Leonardo Chiquitto for reporting the bug, and to
465    Arthur David Olson and James Cloos for suggesting improvements to the fix.)
466
467  Changes affecting documentation
468
469    tz-link.htm now mentions GNOME.
470
471
472Release 2014c - 2014-05-13 07:44:13 -0700
473
474  Changes affecting near-future time stamps
475
476    Egypt observes DST starting 2014-05-15 at 24:00.
477    (Thanks to Ahmad El-Dardiry and Gunther Vermier.)
478    Details have not been announced, except that DST will not be observed
479    during Ramadan.  Guess that DST will stop during the same Ramadan dates as
480    Morocco, and that Egypt's future spring and fall transitions will be the
481    same as 2010 when it last observed DST, namely April's last Friday at
482    00:00 to September's last Thursday at 23:00 standard time.  Also, guess
483    that Ramadan transitions will be at 00:00 standard time.
484
485  Changes affecting code
486
487    zic now generates transitions for minimum time values, eliminating guesswork
488    when handling low-valued time stamps.  (Thanks to Arthur David Olson.)
489
490    Port to Cygwin sans glibc.  (Thanks to Arthur David Olson.)
491
492  Changes affecting commentary and documentation
493
494    Remove now-confusing comment about Jordan.  (Thanks to Oleksii Nochovnyi.)
495
496
497Release 2014b - 2014-03-24 21:28:50 -0700
498
499  Changes affecting near-future time stamps
500
501    Crimea switches to Moscow time on 2014-03-30 at 02:00 local time.
502    (Thanks to Alexander Krivenyshev.)  Move its zone.tab entry from UA to RU.
503
504    New entry for Troll station, Antarctica.  (Thanks to Paul-Inge Flakstad and
505    Bengt-Inge Larsson.)  This is currently an approximation; a better version
506    will require the zic and localtime fixes mentioned below, and the plan is
507    to wait for a while until at least the zic fixes propagate.
508
509  Changes affecting code
510
511    'zic' and 'localtime' no longer reject locations needing four transitions
512    per year for the foreseeable future.  (Thanks to Andrew Main (Zefram).)
513    Also, 'zic' avoids some unlikely failures due to integer overflow.
514
515  Changes affecting build procedure
516
517    'make check' now detects Rule lines defined but never used.
518    The NZAQ rules, an instance of this problem, have been removed.
519
520  Changes affecting commentary and documentation
521
522    Fix Tuesday/Thursday typo in description of time in Israel.
523    (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.)
524
525    Microsoft Windows 8.1 doesn't support tz database names.  (Thanks
526    to Donald MacQueen.)  Instead, the Microsoft Windows Store app
527    library supports them.
528
529    Add comments about Johnston Island time in the 1960s.
530    (Thanks to Lyle McElhaney.)
531
532    Morocco's 2014 DST start will be as predicted.
533    (Thanks to Sebastien Willemijns.)
534
535
536Release 2014a - 2014-03-07 23:30:29 -0800
537
538  Changes affecting near-future time stamps
539
540    Turkey begins DST on 2014-03-31, not 03-30.  (Thanks to Faruk Pasin for
541    the heads-up, and to Tim Parenti for simplifying the update.)
542
543  Changes affecting past time stamps
544
545    Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00.
546    (Thanks to Steffen Thorsen.)
547
548    Ukraine switched from Moscow to Eastern European time on 1990-07-01
549    (not 1992-01-01), and observed DST during the entire next winter.
550    (Thanks to Vladimir in Moscow via Alois Treindl.)
551
552    In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03.
553    (Thanks to Avigdor Finkelstein.)
554
555  Changes affecting code
556
557    A uninitialized-storage bug in 'localtime' has been fixed.
558    (Thanks to Logan Chien.)
559
560  Changes affecting the build procedure
561
562    The settings for 'make check_web' now default to Ubuntu 13.10.
563
564  Changes affecting commentary and documentation
565
566    The boundary of the US Pacific time zone is given more accurately.
567    (Thanks to Alan Mintz.)
568
569    Chile's 2014 DST will be as predicted.  (Thanks to José Miguel Garrido.)
570
571    Paraguay's 2014 DST will be as predicted.  (Thanks to Carlos Raúl Perasso.)
572
573    Better descriptions of countries with same time zone history as
574    Trinidad and Tobago since 1970.  (Thanks to Alan Barrett for suggestion.)
575
576    Several changes affect tz-link.htm, the main web page.
577
578      Mention Time.is (thanks to Even Scharning) and WX-now (thanks to
579      David Braverman).
580
581      Mention xCal (Internet RFC 6321) and jCal.
582
583      Microsoft has some support for tz database names.
584
585      CLDR data formats include both XML and JSON.
586
587      Mention Maggiolo's map of solar vs standard time.
588      (Thanks to Arthur David Olson.)
589
590      Mention TZ4Net.  (Thanks to Matt Johnson.)
591
592      Mention the timezone-olson Haskell package.
593
594      Mention zeitverschiebung.net.  (Thanks to Martin Jäger.)
595
596      Remove moribund links to daylight-savings-time.info and to
597      Simple Timer + Clocks.
598
599      Update two links.  (Thanks to Oscar van Vlijmen.)
600
601      Fix some formatting glitches, e.g., remove random newlines from
602      abbr elements' title attributes.
603
604
605Release 2013i - 2013-12-17 07:25:23 -0800
606
607  Changes affecting near-future time stamps:
608
609    Jordan switches back to standard time at 00:00 on December 20, 2013.
610    The 2006-2011 transition schedule is planned to resume in 2014.
611    (Thanks to Steffen Thorsen.)
612
613  Changes affecting past time stamps:
614
615    In 2004, Cuba began DST on March 28, not April 4.
616    (Thanks to Steffen Thorsen.)
617
618  Changes affecting code
619
620    The compile-time flag NOSOLAR has been removed, as nowadays the
621    benefit of slightly shrinking runtime table size is outweighed by the
622    cost of disallowing potential future updates that exceed old limits.
623
624  Changes affecting documentation and commentary
625
626    The files solar87, solar88, and solar89 are no longer distributed.
627    They were a negative experiment - that is, a demonstration that
628    tz data can represent solar time only with some difficulty and error.
629    Their presence in the distribution caused confusion, as Riyadh
630    civil time was generally not solar time in those years.
631
632    tz-link.htm now mentions Noda Time.  (Thanks to Matt Johnson.)
633
634
635Release 2013h - 2013-10-25 15:32:32 -0700
636
637  Changes affecting current and future time stamps:
638
639    Libya has switched its time zone back to UTC+2 without DST,
640    instead of UTC+1 with DST.  (Thanks to Even Scharning.)
641
642    Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules.
643    (Thanks to Gwillim Law.)
644
645  Changes affecting future time stamps:
646
647    Acre and (we guess) western Amazonas will switch from UTC-4 to UTC-5
648    on 2013-11-10.  This affects America/Rio_Branco and America/Eirunepe.
649    (Thanks to Steffen Thorsen.)
650
651    Add entries for DST transitions in Morocco in the year 2038.
652    This avoids some year-2038 glitches introduced in 2013g.
653    (Thanks to Yoshito Umaoka for reporting the problem.)
654
655  Changes affecting API
656
657    The 'tzselect' command no longer requires the 'select' command,
658    and should now work with /bin/sh on more platforms.  It also works
659    around a bug in BusyBox awk before version 1.21.0.  (Thanks to
660    Patrick 'P. J.' McDermott and Alan Barrett.)
661
662  Changes affecting code
663
664    Fix localtime overflow bugs with 32-bit unsigned time_t.
665
666    zdump no longer assumes sscanf returns maximal values on overflow.
667
668  Changes affecting the build procedure
669
670    The builder can specify which programs to use, if any, instead of
671    'ar' and 'ranlib', and libtz.a is now built locally before being
672    installed.  (Thanks to Michael Forney.)
673
674    A dependency typo in the 'zdump' rule has been fixed.
675    (Thanks to Andrew Paprocki.)
676
677    The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f'
678    work as specified by POSIX.2-1992 or later; this is portable nowadays.
679
680    'make clean' no longer removes 'leapseconds', since it's
681    host-independent and is part of the distribution.
682
683    The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed.
684
685  Changes affecting documentation and commentary
686
687    tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol
688    (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle).
689
690    Update URLs in tz-link page.  Add URLs for Microsoft Windows, since
691    8.1 introduces tz support.  Remove URLs for Tru64 and UnixWare (no
692    longer maintained) and for old advisories.  SOFA now does C.
693
694Release 2013g - 2013-09-30 21:08:26 -0700
695
696  Changes affecting current and near-future time stamps
697
698    Morocco now observes DST from the last Sunday in March to the last
699    Sunday in October, not April to September respectively.  (Thanks
700    to Steffen Thorsen.)
701
702  Changes affecting 'zic'
703
704    'zic' now runs on platforms that lack both hard links and symlinks.
705    (Thanks to Theo Veenker for reporting the problem, for MinGW.)
706    Also, fix some bugs on platforms that lack hard links but have symlinks.
707
708    'zic -v' again warns that Asia/Tehran has no POSIX environment variable
709    to predict the far future, fixing a bug introduced in 2013e.
710
711  Changes affecting the build procedure
712
713    The 'leapseconds' file is again put into the tzdata tarball.
714    Also, 'leapseconds.awk', so tzdata is self-contained.  (Thanks to
715    Matt Burgess and Ian Abbott.)  The timestamps of these and other
716    dependent files in tarballs are adjusted more consistently.
717
718  Changes affecting documentation and commentary
719
720    The README file is now part of the data tarball as well as the code.
721    It now states that files are public domain unless otherwise specified.
722    (Thanks to Andrew Main (Zefram) for asking for clarifications.)
723    Its details about the 1989 release moved to a place of honor near
724    the end of NEWS.
725
726
727Release 2013f - 2013-09-24 23:37:36 -0700
728
729  Changes affecting near-future time stamps
730
731    Tocantins will very likely not observe DST starting this spring.
732    (Thanks to Steffen Thorsen.)
733
734    Jordan will likely stay at UTC+3 indefinitely, and will not fall
735    back this fall.
736
737    Palestine will fall back at 00:00, not 01:00.  (Thanks to Steffen Thorsen.)
738
739  Changes affecting API
740
741    The types of the global variables 'timezone' and 'altzone' (if present)
742    have been changed back to 'long'.  This is required for 'timezone'
743    by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
744    These variables were originally 'long' in the tz code, but were
745    mistakenly changed to 'time_t' in 1987; nobody reported the
746    incompatibility until now.  The difference matters on x32, where
747    'long' is 32 bits and 'time_t' is 64.  (Thanks to Elliott Hughes.)
748
749  Changes affecting the build procedure
750
751    Avoid long strings in leapseconds.awk to work around a mawk bug.
752    (Thanks to Cyril Baurand.)
753
754  Changes affecting documentation and commentary
755
756    New file 'NEWS' that contains release notes like this one.
757
758    Paraguay's law does not specify DST transition time; 00:00 is customary.
759    (Thanks to Waldemar Villamayor-Venialbo.)
760
761    Minor capitalization fixes.
762
763  Changes affecting version-control only
764
765    The experimental GitHub repository now contains annotated and
766    signed tags for recent releases, e.g., '2013e' for Release 2013e.
767    Releases are tagged starting with 2012e; earlier releases were
768    done differently, and tags would either not have a simple name or
769    not exactly match what was released.
770
771    'make set-timestamps' is now simpler and a bit more portable.
772
773
774Release 2013e - 2013-09-19 23:50:04 -0700
775
776  Changes affecting near-future time stamps
777
778    This year Fiji will start DST on October 27, not October 20.
779    (Thanks to David Wheeler for the heads-up.)  For now, guess that
780    Fiji will continue to spring forward the Sunday before the fourth
781    Monday in October.
782
783  Changes affecting current and future time zone abbreviations
784
785    Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian
786    time zone abbreviations since 1932.  (Thanks to George Ziegler,
787    Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and
788    Benny Lin.)  This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura,
789    Asia/Makassar, and Asia/Pontianak.
790
791    Use ART (UTC-3, standard time), rather than WARST (also UTC-3, but
792    daylight saving time) for San Luis, Argentina since 2009.
793
794  Changes affecting Godthåb time stamps after 2037 if version mismatch
795
796    Allow POSIX-like TZ strings where the transition time's hour can
797    range from -167 through 167, instead of the POSIX-required 0
798    through 24.  E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the
799    new Fiji rules.  This is a more-compact way to represent
800    far-future time stamps for America/Godthab, America/Santiago,
801    Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem,
802    Pacific/Easter, and Pacific/Fiji.  Other zones are unaffected by
803    this change.  (Derived from a suggestion by Arthur David Olson.)
804
805    Allow POSIX-like TZ strings where daylight saving time is in
806    effect all year.  E.g., TZ='WART4WARST,J1/0,J365/25' for Western
807    Argentina Summer Time all year.  This supports a more-compact way
808    to represent the 2013d data for America/Argentina/San_Luis.
809    Because of the change for San Luis noted above this change does not
810    affect the current data.  (Thanks to Andrew Main (Zefram) for
811    suggestions that improved this change.)
812
813    Where these two TZ changes take effect, there is a minor extension
814    to the tz file format in that it allows new values for the
815    embedded TZ-format string, and the tz file format version number
816    has therefore been increased from 2 to 3 as a precaution.
817    Version-2-based client code should continue to work as before for
818    all time stamps before 2038.  Existing version-2-based client code
819    (tzcode, GNU/Linux, Solaris) has been tested on version-3-format
820    files, and typically works in practice even for time stamps after
821    2037; the only known exception is America/Godthab.
822
823  Changes affecting time stamps before 1970
824
825    Pacific/Johnston is now a link to Pacific/Honolulu.  This corrects
826    some errors before 1947.
827
828    Some zones have been turned into links, when they differ from existing
829    zones only in older data entries that were likely invented or that
830    differ only in LMT or transitions from LMT.  These changes affect
831    only time stamps before 1943.  The affected zones are:
832    Africa/Juba, America/Anguilla, America/Aruba, America/Dominica,
833    America/Grenada, America/Guadeloupe, America/Marigot,
834    America/Montserrat, America/St_Barthelemy, America/St_Kitts,
835    America/St_Lucia, America/St_Thomas, America/St_Vincent,
836    America/Tortola, and Europe/Vaduz.  (Thanks to Alois Treindl for
837    confirming that the old Europe/Vaduz zone was wrong and the new
838    link is better for WWII-era times.)
839
840    Change Kingston Mean Time from -5:07:12 to -5:07:11.  This affects
841    America/Cayman, America/Jamaica and America/Grand_Turk time stamps
842    from 1890 to 1912.
843
844    Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
845    This affects Europe/Zurich time stamps from 1853 to 1894.  (Thanks
846    to Alois Treindl).
847
848    Change the date of the circa-1850 Zurich transition from 1849-09-12
849    to 1853-07-16, overriding Shanks with data from Messerli about
850    postal and telegraph time in Switzerland.
851
852  Changes affecting time zone abbreviations before 1970
853
854    For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932,
855    as Jakarta was called Batavia back then.
856
857  Changes affecting API
858
859    The 'zic' command now outputs a dummy transition when far-future
860    data can't be summarized using a TZ string, and uses a 402-year
861    window rather than a 400-year window.  For the current data, this
862    affects only the Asia/Tehran file.  It does not affect any of the
863    time stamps that this file represents, so zdump outputs the same
864    information as before.  (Thanks to Andrew Main (Zefram).)
865
866    The 'date' command has a new '-r' option, which lets you specify
867    the integer time to display, a la FreeBSD.
868
869    The 'tzselect' command has two new options '-c' and '-n', which lets you
870    select a zone based on latitude and longitude.
871
872    The 'zic' command's '-v' option now warns about constructs that
873    require the new version-3 binary file format.  (Thanks to Arthur
874    David Olson for the suggestion.)
875
876    Support for floating-point time_t has been removed.
877    It was always dicey, and POSIX no longer requires it.
878    (Thanks to Eric Blake for suggesting to the POSIX committee to
879    remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
880    Heninger, Arthur David Olson, and Alois Treindl, for reporting
881    bugs and elucidating some of the corners of the old floating-point
882    implementation.)
883
884    The signatures of 'offtime', 'timeoff', and 'gtime' have been
885    changed back to the old practice of using 'long' to represent UT
886    offsets.  This had been inadvertently and mistakenly changed to
887    'int_fast32_t'.  (Thanks to Christos Zoulas.)
888
889    The code avoids undefined behavior on integer overflow in some
890    more places, including gmtime, localtime, mktime and zdump.
891
892  Changes affecting the zdump utility
893
894    zdump now outputs "UT" when referring to Universal Time, not "UTC".
895    "UTC" does not make sense for time stamps that predate the introduction
896    of UTC, whereas "UT", a more-generic term, does.  (Thanks to Steve Allen
897    for clarifying UT vs UTC.)
898
899  Data changes affecting behavior of tzselect and similar programs
900
901    Country code BQ is now called the more-common name "Caribbean Netherlands"
902    rather than the more-official "Bonaire, St Eustatius & Saba".
903
904    Remove from zone.tab the names America/Montreal, America/Shiprock,
905    and Antarctica/South_Pole, as they are equivalent to existing
906    same-country-code zones for post-1970 time stamps.  The data entries for
907    these names are unchanged, so the names continue to work as before.
908
909  Changes affecting code internals
910
911    zic -c now runs way faster on 64-bit hosts when given large numbers.
912
913    zic now uses vfprintf to avoid allocating and freeing some memory.
914
915    tzselect now computes the list of continents from the data,
916    rather than have it hard-coded.
917
918    Minor changes pacify GCC 4.7.3 and GCC 4.8.1.
919
920  Changes affecting the build procedure
921
922    The 'leapseconds' file is now generated automatically from a
923    new file 'leap-seconds.list', which is a copy of
924    <ftp://time.nist.gov/pub/leap-seconds.list>.
925    A new source file 'leapseconds.awk' implements this.
926    The goal is simplification of the future maintenance of 'leapseconds'.
927
928    When building the 'posix' or 'right' subdirectories, if the
929    subdirectory would be a copy of the default subdirectory, it is
930    now made a symbolic link if that is supported.  This saves about
931    2 MB of file system space.
932
933    The links America/Shiprock and Antarctica/South_Pole have been
934    moved to the 'backward' file.  This affects only nondefault builds
935    that omit 'backward'.
936
937  Changes affecting version-control only
938
939    .gitignore now ignores 'date'.
940
941  Changes affecting documentation and commentary
942
943    Changes to the 'tzfile' man page
944
945      It now mentions that the binary file format may be extended in
946      future versions by appending data.
947
948      It now refers to the 'zdump' and 'zic' man pages.
949
950    Changes to the 'zic' man page
951
952      It lists conditions that elicit a warning with '-v'.
953
954      It says that the behavior is unspecified when duplicate names
955      are given, or if the source of one link is the target of another.
956
957      Its examples are updated to match the latest data.
958
959      The definition of white space has been clarified slightly.
960      (Thanks to Michael Deckers.)
961
962    Changes to the 'Theory' file
963
964      There is a new section about the accuracy of the tz database,
965      describing the many ways that errors can creep in, and
966      explaining why so many of the pre-1970 time stamps are wrong or
967      misleading (thanks to Steve Allen, Lester Caine, and Garrett
968      Wollman for discussions that contributed to this).
969
970      The 'Theory' file describes LMT better (this follows a
971      suggestion by Guy Harris).
972
973      It refers to the 2013 edition of POSIX rather than the 2004 edition.
974
975      It's mentioned that excluding 'backward' should not affect the
976      other data, and it suggests at least one zone.tab name per
977      inhabited country (thanks to Stephen Colebourne).
978
979      Some longstanding restrictions on names are documented, e.g.,
980      'America/New_York' precludes 'America/New_York/Bronx'.
981
982      It gives more reasons for the 1970 cutoff.
983
984      It now mentions which time_t variants are supported, such as
985      signed integer time_t.  (Thanks to Paul Goyette for reporting
986      typos in an experimental version of this change.)
987
988      (Thanks to Philip Newton for correcting typos in these changes.)
989
990    Documentation and commentary is more careful to distinguish UT in
991    general from UTC in particular.  (Thanks to Steve Allen.)
992
993    Add a better source for the Zurich 1894 transition.
994    (Thanks to Pierre-Yves Berger.)
995
996    Update shapefile citations in tz-link.htm.  (Thanks to Guy Harris.)
997
998
999Release 2013d - 2013-07-05 07:38:01 -0700
1000
1001  Changes affecting future time stamps:
1002
1003    Morocco's midsummer transitions this year are July 7 and August 10,
1004    not July 9 and August 8.  (Thanks to Andrew Paprocki.)
1005
1006    Israel now falls back on the last Sunday of October.
1007    (Thanks to Ephraim Silverberg.)
1008
1009  Changes affecting past time stamps:
1010
1011    Specify Jerusalem's location more precisely; this changes the pre-1880
1012    times by 2 s.
1013
1014  Changing affecting metadata only:
1015
1016    Fix typos in the entries for country codes BQ and SX.
1017
1018  Changes affecting code:
1019
1020    Rework the code to fix a bug with handling Australia/Macquarie on
1021    32-bit hosts (thanks to Arthur David Olson).
1022
1023    Port to platforms like NetBSD, where time_t can be wider than long.
1024
1025    Add support for testing time_t types other than the system's.
1026    Run 'make check_time_t_alternatives' to try this out.
1027    Currently, the tests fail for unsigned time_t;
1028    this should get fixed at some point.
1029
1030  Changes affecting documentation and commentary:
1031
1032    Deemphasize the significance of national borders.
1033
1034    Update the zdump man page.
1035
1036    Remove obsolete NOID comment (thanks to Denis Excoffier).
1037
1038    Update several URLs and comments in the web pages.
1039
1040    Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler).
1041
1042    Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka).
1043
1044
1045Release 2013c - 2013-04-19 16:17:40 -0700
1046
1047  Changes affecting current and future time stamps:
1048
1049    Palestine observed DST starting March 29, 2013.  (Thanks to
1050    Steffen Thorsen.)  From 2013 on, Gaza and Hebron both observe DST,
1051    with the predicted rules being the last Thursday in March at 24:00
1052    to the first Friday on or after September 21 at 01:00.
1053
1054    Assume that the recent change to Paraguay's DST rules is permanent,
1055    by moving the end of DST to the 4th Sunday in March every year.
1056    (Thanks to Carlos Raúl Perasso.)
1057
1058  Changes affecting past time stamps:
1059
1060    Fix some historical data for Palestine to agree with that of
1061    timeanddate.com, as follows:
1062
1063	  The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not
1064	  00:00 Apr 1.
1065
1066	  The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not
1067	  02:00.
1068
1069	  The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27.
1070
1071	  The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2.
1072
1073	  The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01.
1074
1075	  The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00.
1076
1077    Fix times of habitation for Macquarie to agree with the Tasmania
1078    Parks & Wildlife Service history, which indicates that permanent
1079    habitation was 1899-1919 and 1948 on.
1080
1081  Changing affecting metadata only:
1082
1083    Macquarie Island is politically part of Australia, not Antarctica.
1084    (Thanks to Tobias Conradi.)
1085
1086    Sort Macquarie more-consistently with other parts of Australia.
1087    (Thanks to Tim Parenti.)
1088
1089
1090Release 2013b - 2013-03-10 22:33:40 -0700
1091
1092  Changes affecting current and future time stamps:
1093
1094    Haiti uses US daylight-saving rules this year, and presumably future years.
1095    This changes time stamps starting today.  (Thanks to Steffen Thorsen.)
1096
1097    Paraguay will end DST on March 24 this year.
1098    (Thanks to Steffen Thorsen.)  For now, assume it's just this year.
1099
1100    Morocco does not observe DST during Ramadan;
1101    try to predict Ramadan in Morocco as best we can.
1102    (Thanks to Erik Homoet for the heads-up.)
1103
1104  Changes affecting commentary:
1105
1106    Update URLs in tz-link page.  Add URLs for webOS, BB10, iOS.
1107    Update URL for Solaris.  Mention Internet RFC 6557.
1108    Update Internet RFCs 2445->5545, 2822->5322.
1109    Switch from FTP to HTTP for Internet RFCs.
1110
1111
1112Release 2013a - 2013-02-27 09:20:35 -0800
1113
1114  Change affecting binary data format:
1115
1116    The zone offset at the end of version-2-format zone files is now
1117    allowed to be 24:00, as per POSIX.1-2008.  (Thanks to Arthur David Olson.)
1118
1119  Changes affecting current and future time stamps:
1120
1121    Chile's 2013 rules, and we guess rules for 2014 and later, will be
1122    the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC.
1123    (Thanks to Steffen Thorsen and Robert Elz.)
1124
1125    New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen.
1126    (Thanks to Tobias Conradi and Arthur David Olson.)
1127
1128  Many changes affect historical time stamps before 1940.
1129  These were deduced from: Milne J. Civil time. Geogr J. 1899
1130  Feb;13(2):173-94 <http://www.jstor.org/stable/1774359>.
1131
1132  Changes affecting the code:
1133
1134    Fix zic bug that mishandled Egypt's 2010 changes (this also affected
1135    the data).  (Thanks to Arthur David Olson.)
1136
1137    Fix localtime bug when time_t is unsigned and data files were generated
1138    by a signed time_t system.  (Thanks to Doug Bailey for reporting and
1139    to Arthur David Olson for fixing.)
1140
1141    Allow the email address for bug reports to be set by the packager.
1142    The default is tz@iana.org, as before.  (Thanks to Joseph S. Myers.)
1143
1144    Update HTML checking to be compatible with Ubuntu 12.10.
1145
1146    Check that files are a safe subset of ASCII.  At some point we may
1147    relax this requirement to a safe subset of UTF-8.  Without the
1148    check, some non-UTF-8 encodings were leaking into the distribution.
1149
1150  Commentary changes:
1151
1152    Restore a comment about copyright notices that was inadvertently deleted.
1153    (Thanks to Arthur David Olson.)
1154
1155    Improve the commentary about which districts observe what times
1156    in Russia.  (Thanks to Oscar van Vlijmen and Arthur David Olson).
1157
1158    Add web page links to tz.js.
1159
1160    Add "Run by the Monkeys" to tz-art.  (Thanks to Arthur David Olson.)
1161
1162
1163Release 2012j - 2012-11-12 18:34:49 -0800
1164
1165  Libya moved to CET this weekend, but with DST planned next year.
1166  (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.)
1167
1168  Signatures now have the extension .asc, not .sign, as that's more
1169  standard.  (Thanks to Phil Pennock.)
1170
1171  The output of 'zdump --version', and of 'zic --version', now
1172  uses a format that is more typical for --version.
1173  (Thanks to Joseph S. Myers.)
1174
1175  The output of 'tzselect --help', 'zdump --help', and 'zic --help'
1176  now uses tz@iana.org rather than the old elsie address.
1177
1178  zic -v now complains about abbreviations that are less than 3
1179  or more than 6 characters, as per Posix.  Formerly, it checked
1180  for abbreviations that were more than 3.
1181
1182  'make public' no longer puts its temporary directory under /tmp,
1183  and uses the just-built zic rather than the system zic.
1184
1185  Various fixes to documentation and commentary.
1186
1187
1188Release 2012i - 2012-11-03 12:57:09 -0700
1189
1190  Cuba switches from DST tomorrow at 01:00.  (Thanks to Steffen Thorsen.)
1191
1192  Linker flags can now be specified via LDFLAGS.
1193  AWK now defaults to 'awk', not 'nawk'.
1194  The shell in tzselect now defaults to /bin/bash, but this can
1195  be overridden by specifying KSHELL.
1196  The main web page now mentions the unofficial GitHub repository.
1197  (Thanks to Mike Frysinger.)
1198
1199  Tarball signatures can now be built by running 'make signatures'.
1200  There are also new makefile rules 'tarballs', 'check_public', and
1201  separate makefile rules for each tarball and signature file.
1202  A few makefile rules are now more portable to strict POSIX.
1203
1204  The main web page now lists the canonical IANA URL.
1205
1206
1207Release 2012h - 2012-10-26 22:49:10 -0700
1208
1209  Bahia no longer has DST.  (Thanks to Kelley Cook.)
1210
1211  Tocantins has DST.  (Thanks to Rodrigo Severo.)
1212
1213  Israel has new DST rules next year.  (Thanks to Ephraim Silverberg.)
1214
1215  Jordan stays on DST this winter.  (Thanks to Steffen Thorsen.)
1216
1217  Web page updates.
1218
1219  More C modernization, except that at Arthur David Olson's suggestion
1220  the instances of 'register' were kept.
1221
1222
1223Release 2012g - 2012-10-17 20:59:45 -0700
1224
1225  Samoa fall 2012 and later.  (Thanks to Nicholas Pereira and Robert Elz.)
1226
1227  Palestine fall 2012.  (Thanks to Steffen Thorsen.)
1228
1229  Assume C89.
1230
1231  To attack the version-number problem, this release ships the file
1232  'Makefile' (which contains the release number) in both the tzcode and
1233  the tzdata tarballs.  The two Makefiles are identical, and should be
1234  identical in any matching pair of tarballs, so it shouldn't matter
1235  which order you extract the tarballs.  Perhaps we can come up with a
1236  better version-number scheme at some point; this scheme does have the
1237  virtue of not adding more files.
1238
1239
1240Release 2012f - 2012-09-12 23:17:03 -0700
1241
1242  * australasia (Pacific/Fiji): Fiji DST is October 21 through January
1243    20 this year.  (Thanks to Steffen Thorsen.)
1244
1245
1246Release 2012e - 2012-08-02 20:44:55 -0700
1247
1248  * australasia (Pacific/Fakaofo): Tokelau is UTC+13, not UTC+14.
1249    (Thanks to Steffen Thorsen.)
1250
1251  * Use a single version number for both code and data.
1252
1253  * .gitignore: New file.
1254
1255  * Remove trailing white space.
1256
1257
1258Release code2012c-data2012d - 2012-07-19 16:35:33 -0700
1259
1260  Changes for Morocco's time stamps, which take effect in a couple of
1261  hours, along with infrastructure changes to accommodate how the tz
1262  code and data are released on IANA.
1263
1264
1265Release data2012c - 2012-03-27 12:17:25 -0400
1266
1267  africa
1268	Summer time changes for Morocco (to start late April 2012)
1269
1270  asia
1271	Changes for 2012 for Gaza & the West Bank (Hebron) and Syria
1272
1273  northamerica
1274	Haiti following US/Canada rules for 2012 (and we're assuming,
1275	for now anyway, for the future).
1276
1277
1278Release 2012b - 2012-03-02 12:29:15 +0700
1279
1280  There is just one change to tzcode2012b (compared with 2012a):
1281  the Makefile that was accidentally included with 2012a has been
1282  replaced with the version that should have been there, which is
1283  identical with the previous version (from tzcode2011i).
1284
1285  There are just two changes in tzdata2012b compared with 2012a.
1286
1287  Most significantly, summer time in Cuba has been delayed 3 weeks
1288  (now starts April 1 rather than March 11).   Since Mar 11 (the old start
1289  date, as listed in 2012a) is just a little over a week away, this
1290  change is urgent.
1291
1292  Less importantly, an excess tab in one of the changes in zone.tab
1293  in 2012a has been removed.
1294
1295
1296Release 2012a - 2012-03-01 18:28:10 +0700
1297
1298  The changes in tzcode2012a (compared to the previous version, 2011i)
1299  are entirely to the README and tz-art.htm and tz-link.htm files, if
1300  none of those concern you, you can ignore the code update.  The changes
1301  reflect the changed addresses for the mailing list and the code and
1302  data distribution points & methods (and a link to DateTime::TimeZone::Tzfile
1303  has been added to tz-link.htm).
1304
1305  In tzdata2012a (compared to the previous release, which was 2011n)
1306  the major changes are:
1307	Chile 2011/2012 and 2012/2013 summer time date adjustments.
1308	Falkland Islands onto permanent summer time (we're assuming for the
1309		foreseeable future, though 2012 is all we're fairly certain of.)
1310	Armenia has abolished Summer Time.
1311	Tokelau jumped the International Date Line back last December
1312		(just the same as their near neighbour, Samoa).
1313	America/Creston is a new zone for a small area of British Columbia
1314	There will be a leapsecond 2012-06-30 23:59:60 UTC.
1315
1316  Other minor changes are:
1317	Corrections to 1918 Canadian summer time end dates.
1318	Updated URL for UK time zone history (in comments)
1319	A few typos in Le Corre's list of free French place names (comments)
1320
1321
1322Release data2011n - 2011-10-30 14:57:54 +0700
1323
1324  There are three changes of note - most urgently, Cuba (America/Havana)
1325  has extended summer time by two weeks, now to end on Nov 13, rather than
1326  the (already past) Oct 30.   Second, the Pridnestrovian Moldavian Republic
1327  (Europe/Tiraspol) decided not to split from the rest of Moldova after
1328  all, and consequently that zone has been removed (again) and reinstated
1329  in the "backward" file as a link to Europe/Chisinau.   And third, the
1330  end date for Fiji's summer time this summer was moved forward from the
1331  earlier planned Feb 26, to Jan 22.
1332
1333  Apart from that, Moldova (MD) returns to a single entry in zone.tab
1334  (and the incorrect syntax that was in the 2011m version of that file
1335  is so fixed - it would have been fixed in a different way had this
1336  change not happened - that's the "missing" sccs version id).
1337
1338
1339Release data2011m - 2011-10-24 21:42:16 +0700
1340
1341  In particular, the typos in comments in the data (2011-11-17 should have
1342  been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that
1343  Tim Parenti noted) have been fixed, and the change for Ukraine has been
1344  made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to
1345  Tim Parenti, and also Denys Gavrysh)
1346
1347  In addition, I added Europe/Tiraspol to zone.tab.
1348
1349  This time, all the files have new version numbers...  (including the files
1350  otherwise unchanged in 2011m that were changed in 2011l but didn't get new
1351  version numbers there...)
1352
1353
1354Release data2011l - 2011-10-10 11:15:43 +0700
1355
1356  There are just 2 changes that cause different generated tzdata files from
1357  zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil
1358  is included, but commented out.  Compared with the diff I sent out last week,
1359  this version also includes attributions for the sources for the changes
1360  (in much the same format as ado used, but the html tags have not been
1361  checked, verified, or used in any way at all, so if there are errors there,
1362  please let me know.)
1363
1364
1365Release data2011k - 2011-09-20 17:54:03 -0400
1366
1367  [not summarized]
1368
1369
1370Release data2011j - 2011-09-12 09:22:49 -0400
1371
1372  (contemporary changes for Samoa; past changes for Kenya, Uganda, and
1373  Tanzania); there are also two spelling corrections to comments in
1374  the australasia file (with thanks to Christos Zoulas).
1375
1376
1377Release 2011i - 2011-08-29 05:56:32 -0400
1378
1379  [not summarized]
1380
1381
1382Release data2011h - 2011-06-15 18:41:48 -0400
1383
1384  Russia and Curaçao changes
1385
1386
1387Release 2011g - 2011-04-25 09:07:22 -0400
1388
1389  update the rules for Egypt to reflect its abandonment of DST this year
1390
1391
1392Release 2011f - 2011-04-06 17:14:53 -0400
1393
1394  [not summarized]
1395
1396
1397Release 2011e - 2011-03-31 16:04:38 -0400
1398
1399  Morocco, Chile, and tz-link changes
1400
1401
1402Release 2011d - 2011-03-14 09:18:01 -0400
1403
1404  changes that impact present-day time stamps in Cuba, Samoa, and Turkey
1405
1406
1407Release 2011c - 2011-03-07 09:30:09 -0500
1408
1409  These do affect current time stamps in Chile and Annette Island, Canada.
1410
1411
1412Release 2011b - 2011-02-07 08:44:50 -0500
1413
1414  [not summarized]
1415
1416
1417Release 2011a - 2011-01-24 10:30:16 -0500
1418
1419  [not summarized]
1420
1421
1422Release data2010o - 2010-11-01 09:18:23 -0400
1423
1424  change to the end of DST in Fiji in 2011
1425
1426
1427Release 2010n - 2010-10-25 08:19:17 -0400
1428
1429  [not summarized]
1430
1431
1432Release 2010m - 2010-09-27 09:24:48 -0400
1433
1434  Hong Kong, Vostok, and zic.c changes
1435
1436
1437Release 2010l - 2010-08-16 06:57:25 -0400
1438
1439  [not summarized]
1440
1441
1442Release 2010k - 2010-07-26 10:42:27 -0400
1443
1444  [not summarized]
1445
1446
1447Release 2010j - 2010-05-10 09:07:48 -0400
1448
1449  changes for Bahía de Banderas and for version naming
1450
1451
1452Release data2010i - 2010-04-16 18:50:45 -0400
1453
1454  the end of DST in Morocco on 2010-08-08
1455
1456
1457Release data2010h - 2010-04-05 09:58:56 -0400
1458
1459  [not summarized]
1460
1461
1462Release data2010g - 2010-03-24 11:14:53 -0400
1463
1464  [not summarized]
1465
1466
1467Release 2010f - 2010-03-22 09:45:46 -0400
1468
1469  [not summarized]
1470
1471
1472Release data2010e - 2010-03-08 14:24:27 -0500
1473
1474  corrects the Dhaka bug found by Danvin Ruangchan
1475
1476
1477Release data2010d - 2010-03-06 07:26:01 -0500
1478
1479  [not summarized]
1480
1481
1482Release 2010c - 2010-03-01 09:20:58 -0500
1483
1484  changes including KRE's suggestion for earlier initialization of
1485  "goahead" and "goback" structure elements
1486
1487
1488Release code2010a - 2010-02-16 10:40:04 -0500
1489
1490  [not summarized]
1491
1492
1493Release data2010b - 2010-01-20 12:37:01 -0500
1494
1495  Mexico changes
1496
1497
1498Release data2010a - 2010-01-18 08:30:04 -0500
1499
1500  changes to Dhaka
1501
1502
1503Release data2009u - 2009-12-26 08:32:28 -0500
1504
1505  changes to DST in Bangladesh
1506
1507
1508Release 2009t - 2009-12-21 13:24:27 -0500
1509
1510  [not summarized]
1511
1512
1513Release data2009s - 2009-11-14 10:26:32 -0500
1514
1515  (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change
1516
1517
1518Release 2009r - 2009-11-09 10:10:31 -0500
1519
1520  "antarctica" and "tz-link.htm" changes
1521
1522
1523Release 2009q - 2009-11-02 09:12:40 -0500
1524
1525  with two corrections as reported by Eric Muller and Philip Newton
1526
1527
1528Release data2009p - 2009-10-23 15:05:27 -0400
1529
1530  Argentina (including San Luis) changes (with the correction from
1531  Mariano Absatz)
1532
1533
1534Release data2009o - 2009-10-14 16:49:38 -0400
1535
1536  Samoa (commentary only), Pakistan, and Bangladesh changes
1537
1538
1539Release data2009n - 2009-09-22 15:13:38 -0400
1540
1541  added commentary for Argentina and a change to the end of DST in
1542  2009 in Pakistan
1543
1544
1545Release data2009m - 2009-09-03 10:23:43 -0400
1546
1547  Samoa and Palestine changes
1548
1549
1550Release data2009l - 2009-08-14 09:13:07 -0400
1551
1552  Samoa (comments only) and Egypt
1553
1554
1555Release 2009k - 2009-07-20 09:46:08 -0400
1556
1557  [not summarized]
1558
1559
1560Release data2009j - 2009-06-15 06:43:59 -0400
1561
1562  Bangladesh change (with a short turnaround since the DST change is
1563  impending)
1564
1565
1566Release 2009i - 2009-06-08 09:21:22 -0400
1567
1568  updating for DST in Bangladesh this year
1569
1570
1571Release 2009h - 2009-05-26 09:19:14 -0400
1572
1573  [not summarized]
1574
1575
1576Release data2009g - 2009-04-20 16:34:07 -0400
1577
1578  Cairo
1579
1580
1581Release data2009f - 2009-04-10 11:00:52 -0400
1582
1583  correct DST in Pakistan
1584
1585
1586Release 2009e - 2009-04-06 09:08:11 -0400
1587
1588  [not summarized]
1589
1590
1591Release 2009d - 2009-03-23 09:38:12 -0400
1592
1593  Morocco, Tunisia, Argentina, and American Astronomical Society changes
1594
1595
1596Release data2009c - 2009-03-16 09:47:51 -0400
1597
1598  change to the start of Cuban DST
1599
1600
1601Release 2009b - 2009-02-09 11:15:22 -0500
1602
1603  [not summarized]
1604
1605
1606Release 2009a - 2009-01-21 10:09:39 -0500
1607
1608  [not summarized]
1609
1610
1611Release data2008i - 2008-10-21 12:10:25 -0400
1612
1613  southamerica and zone.tab files, with Argentina DST rule changes and
1614  United States zone reordering and recommenting
1615
1616
1617Release 2008h - 2008-10-13 07:33:56 -0400
1618
1619  [not summarized]
1620
1621
1622Release 2008g - 2008-10-06 09:03:18 -0400
1623
1624  Fix a broken HTML anchor and update Brazil's DST transitions;
1625  there's also a slight reordering of information in tz-art.htm.
1626
1627
1628Release data2008f - 2008-09-09 22:33:26 -0400
1629
1630  [not summarized]
1631
1632
1633Release 2008e - 2008-07-28 14:11:17 -0400
1634
1635  changes by Arthur David Olson and Jesper Nørgaard Welen
1636
1637
1638Release data2008d - 2008-07-07 09:51:38 -0400
1639
1640  changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo
1641
1642
1643Release data2008c - 2008-05-19 17:48:03 -0400
1644
1645  Pakistan, Morocco, and Mongolia
1646
1647
1648Release data2008b - 2008-03-24 08:30:59 -0400
1649
1650  including renaming Asia/Calcutta to Asia/Kolkata, with a backward
1651  link provided
1652
1653
1654Release 2008a - 2008-03-08 05:42:16 -0500
1655
1656  [not summarized]
1657
1658
1659Release 2007k - 2007-12-31 10:25:22 -0500
1660
1661  most importantly, changes to the "southamerica" file based on
1662  Argentina's readoption of daylight saving time
1663
1664
1665Release 2007j - 2007-12-03 09:51:01 -0500
1666
1667  1. eliminate the "P" (parameter) macro;
1668
1669  2. the "noncontroversial" changes circulated on the time zone
1670  mailing list (less the changes to "logwtmp.c");
1671
1672  3. eliminate "too many transition" errors when "min" is used in time
1673  zone rules;
1674
1675  4. changes by Paul Eggert (including updated information for Venezuela).
1676
1677
1678Release data2007i - 2007-10-30 10:28:11 -0400
1679
1680  changes for Cuba and Syria
1681
1682
1683Release 2007h - 2007-10-01 10:05:51 -0400
1684
1685  changes by Paul Eggert, as well as an updated link to the ICU
1686  project in tz-link.htm
1687
1688
1689Release 2007g - 2007-08-20 10:47:59 -0400
1690
1691  changes by Paul Eggert
1692
1693  The "leapseconds" file has been updated to incorporate the most
1694  recent International Earth Rotation and Reference Systems Service
1695  (IERS) bulletin.
1696
1697  There's an addition to tz-art.htm regarding the television show "Medium".
1698
1699
1700Release 2007f - 2007-05-07 10:46:46 -0400
1701
1702  changes by Paul Eggert (including Haiti, Turks and Caicos, and New
1703  Zealand)
1704
1705  changes to zic.c to allow hour values greater than 24 (along with
1706  Paul's improved time value overflow checking)
1707
1708
1709Release 2007e - 2007-04-02 10:11:52 -0400
1710
1711  Syria and Honduras changes by Paul Eggert
1712
1713  zic.c variable renaming changes by Arthur David Olson
1714
1715
1716Release 2007d - 2007-03-20 08:48:30 -0400
1717
1718  changes by Paul Eggert
1719
1720  the elimination of white space at the ends of lines
1721
1722
1723Release 2007c - 2007-02-26 09:09:37 -0500
1724
1725  changes by Paul Eggert
1726
1727
1728Release 2007b - 2007-02-12 09:34:20 -0500
1729
1730  Paul Eggert's proposed change to the quotation handling logic in zic.c.
1731
1732  changes to the commentary in "leapseconds" reflecting the IERS
1733  announcement that there is to be no positive leap second at the end
1734  of June 2007.
1735
1736
1737Release 2007a - 2007-01-08 12:28:29 -0500
1738
1739  changes by Paul Eggert
1740
1741  Derick Rethan's Asmara change
1742
1743  Oscar van Vlijmen's Easter Island local mean time change
1744
1745  symbolic link changes
1746
1747
1748Release 2006p - 2006-11-27 08:54:27 -0500
1749
1750  changes by Paul Eggert
1751
1752
1753Release 2006o - 2006-11-06 09:18:07 -0500
1754
1755  changes by Paul Eggert
1756
1757
1758Release 2006n - 2006-10-10 11:32:06 -0400
1759
1760  changes by Paul Eggert
1761
1762
1763Release 2006m - 2006-10-02 15:32:35 -0400
1764
1765  changes for Uruguay, Palestine, and Egypt by Paul Eggert
1766
1767  (minimalist) changes to zic.8 to clarify "until" information
1768
1769
1770Release data2006l - 2006-09-18 12:58:11 -0400
1771
1772  Paul's best-effort work on this coming weekend's Egypt time change
1773
1774
1775Release 2006k - 2006-08-28 12:19:09 -0400
1776
1777  changes by Paul Eggert
1778
1779
1780Release 2006j - 2006-08-21 09:56:32 -0400
1781
1782  changes by Paul Eggert
1783
1784
1785Release code2006i - 2006-08-07 12:30:55 -0400
1786
1787  localtime.c fixes
1788
1789  Ken Pizzini's conversion script
1790
1791
1792Release code2006h - 2006-07-24 09:19:37 -0400
1793
1794  adds public domain notices to four files
1795
1796  includes a fix for transition times being off by a second
1797
1798  adds a new recording to the "arts" file (information courtesy Colin Bowern)
1799
1800
1801Release 2006g - 2006-05-08 17:18:09 -0400
1802
1803  northamerica changes by Paul Eggert
1804
1805
1806Release 2006f - 2006-05-01 11:46:00 -0400
1807
1808  a missing version number problem is fixed (with thanks to Bradley
1809  White for catching the problem)
1810
1811
1812Release 2006d - 2006-04-17 14:33:43 -0400
1813
1814  changes by Paul Eggert
1815
1816  added new items to tz-arts.htm that were found by Paul
1817
1818
1819Release 2006c - 2006-04-03 10:09:32 -0400
1820
1821  two sets of data changes by Paul Eggert
1822
1823  a fencepost error fix in zic.c
1824
1825  changes to zic.c and the "europe" file to minimize differences
1826  between output produced by the old 32-bit zic and the new 64-bit
1827  version
1828
1829
1830Release 2006b - 2006-02-20 10:08:18 -0500
1831  [tz32code2006b + tz64code2006b + tzdata2006b]
1832
1833  64-bit code
1834
1835  All SCCS IDs were bumped to "8.1" for this release.
1836
1837
1838Release 2006a - 2006-01-30 08:59:31 -0500
1839
1840  changes by Paul Eggert (in particular, Indiana time zone moves)
1841
1842  an addition to the zic manual page to describe how special-case
1843  transitions are handled
1844
1845
1846Release 2005r - 2005-12-27 09:27:13 -0500
1847
1848  Canadian changes by Paul Eggert
1849
1850  They also add "<pre>" directives to time zone data files and reflect
1851  changes to warning message logic in "zdump.c" (but with calls to
1852  "gettext" kept unbundled at the suggestion of Ken Pizzini).
1853
1854
1855Release 2005q - 2005-12-13 09:17:09 -0500
1856
1857  Nothing earth-shaking here:
1858	1.  Electronic mail addresses have been removed.
1859	2.  Casts of the return value of exit have been removed.
1860	3.  Casts of the argument of is.* macros have been added.
1861	4.  Indentation in one section of zic.c has been fixed.
1862	5.  References to dead URLs in the data files have been dealt with.
1863
1864
1865Release 2005p - 2005-12-05 10:30:53 -0500
1866
1867  "systemv", "tz-link.htm", and "zdump.c" changes
1868  (less the casts of arguments to the is* macros)
1869
1870
1871Release 2005o - 2005-11-28 10:55:26 -0500
1872
1873  Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert
1874
1875  zdump.c lint fixes by Arthur David Olson
1876
1877
1878Release 2005n - 2005-10-03 09:44:09 -0400
1879
1880  changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan
1881  et al. changes)
1882
1883
1884Release 2005m - 2005-08-29 12:15:40 -0400
1885
1886  changes by Paul Eggert (with a small tweak to the tz-art change)
1887
1888  a declaration of an unused variable has been removed from zdump.c
1889
1890
1891Release 2005l - 2005-08-22 12:06:39 -0400
1892
1893  changes by Paul Eggert
1894
1895  overflow/underflow checks by Arthur David Olson, minus changes to
1896  the "Theory" file about the pending addition of 64-bit data (I grow
1897  less confident of the changes being accepted with each passing day,
1898  and the changes no longer increase the data files nine-fold--there's
1899  less than a doubling in size by my local Sun's reckoning)
1900
1901
1902Release 2005k - 2005-07-14 14:14:24 -0400
1903
1904  The "leapseconds" file has been edited to reflect the recently
1905  announced leap second at the end of 2005.
1906
1907  I've also deleted electronic mail addresses from the files as an
1908  anti-spam measure.
1909
1910
1911Release 2005j - 2005-06-13 14:34:13 -0400
1912
1913  These reflect changes to limit the length of time zone abbreviations
1914  and the characters used in those abbreviations.
1915
1916  There are also changes to handle POSIX-style "quoted" time zone
1917  environment variables.
1918
1919  The changes were circulated on the time zone mailing list; the only
1920  change since then was the removal of a couple of minimum-length of
1921  abbreviation checks.
1922
1923
1924Release data2005i - 2005-04-21 15:04:16 -0400
1925
1926  changes (most importantly to Nicaragua and Haiti) by Paul Eggert
1927
1928
1929Release 2005h - 2005-04-04 11:24:47 -0400
1930
1931  changes by Paul Eggert
1932
1933  minor changes to Makefile and zdump.c to produce more useful output
1934  when doing a "make typecheck"
1935
1936
1937Release 2005g - 2005-03-14 10:11:21 -0500
1938
1939  changes by Paul Eggert (a change to current DST rules in Uruguay and
1940  an update to a link to time zone software)
1941
1942
1943Release 2005f - 2005-03-01 08:45:32 -0500
1944
1945  data and documentation changes by Paul Eggert
1946
1947
1948Release 2005e - 2005-02-10 15:59:44 -0500
1949
1950  [not summarized]
1951
1952
1953Release code2005d - 2005-01-31 09:21:47 -0500
1954
1955  make zic complain about links to links if the -v flag is used
1956
1957  have "make public" do more code checking
1958
1959  add an include to "localtime.c" for the benefit of gcc systems
1960
1961
1962Release 2005c - 2005-01-17 18:36:29 -0500
1963
1964  get better results when mktime runs on a system where time_t is double
1965
1966  changes to the data files (most importantly to Paraguay)
1967
1968
1969Release 2005b - 2005-01-10 09:19:54 -0500
1970
1971  Get localtime and gmtime working on systems with exotic time_t types.
1972
1973  Update the leap second commentary in the "leapseconds" file.
1974
1975
1976Release 2005a - 2005-01-01 13:13:44 -0500
1977
1978  [not summarized]
1979
1980
1981Release code2004i - 2004-12-14 13:42:58 -0500
1982
1983  Deal with systems where time_t is unsigned.
1984
1985
1986Release code2004h - 2004-12-07 11:40:18 -0500
1987
1988  64-bit-time_t changes
1989
1990
1991Release 2004g - 2004-11-02 09:06:01 -0500
1992
1993  update to Cuba (taking effect this weekend)
1994
1995  other changes by Paul Eggert
1996
1997  correction of the spelling of Oslo
1998
1999  changed versions of difftime.c and private.h
2000
2001
2002Release code2004f - 2004-10-21 10:25:22 -0400
2003
2004  Cope with wide-ranging tm_year values.
2005
2006
2007Release 2004e - 2004-10-11 14:47:21 -0400
2008
2009  Brazil/Argentina/Israel changes by Paul Eggert
2010
2011  changes to tz-link.htm by Paul
2012
2013  one small fix to Makefile
2014
2015
2016Release 2004d - 2004-09-22 08:27:29 -0400
2017
2018  Avoid overflow problems when TM_YEAR_BASE is added to an integer.
2019
2020
2021Release 2004c - 2004-08-11 12:06:26 -0400
2022
2023  asctime-related changes
2024
2025  (variants of) some of the documentation changes suggested by Paul Eggert
2026
2027
2028Release 2004b - 2004-07-19 14:33:35 -0400
2029
2030  data changes by Paul Eggert - most importantly, updates for Argentina
2031
2032
2033Release 2004a - 2004-05-27 12:00:47 -0400
2034
2035  changes by Paul Eggert
2036
2037  Handle DST transitions that occur at the end of a month in some
2038  years but at the start of the following month in other years.
2039
2040  Add a copy of the correspondence that's the basis for claims about
2041  DST in the Navajo Nation.
2042
2043
2044Release 2003e - 2003-12-15 09:36:47 -0500
2045
2046  changes by Arthur David Olson (primarily code changes)
2047
2048  changes by Paul Eggert (primarily data changes)
2049
2050  minor changes to "Makefile" and "northamerica" (in the latter case,
2051  optimization of the "Toronto" rules)
2052
2053
2054Release 2003d - 2003-10-06 09:34:44 -0400
2055
2056  changes by Paul Eggert
2057
2058
2059Release 2003c - 2003-09-16 10:47:05 -0400
2060
2061  Fix bad returns in zic.c's inleap function.
2062  Thanks to Bradley White for catching the problem!
2063
2064
2065Release 2003b - 2003-09-16 07:13:44 -0400
2066
2067  Add a "--version" option (and documentation) to the zic and zdump commands.
2068
2069  changes to overflow/underflow checking in zic
2070
2071  a localtime typo fix.
2072
2073  Update the leapseconds and tz-art.htm files.
2074
2075
2076Release 2003a - 2003-03-24 09:30:54 -0500
2077
2078  changes by Paul Eggert
2079
2080  a few additions and modifications to the tz-art.htm file
2081
2082
2083Release 2002d - 2002-10-15 13:12:42 -0400
2084
2085  changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab
2086
2087  There's also a new time zone quote in "tz-art.htm".
2088
2089
2090Release 2002c - 2002-04-04 11:55:20 -0500
2091
2092  changes by Paul Eggert
2093
2094  Change zic.c to avoid creating symlinks to files that don't exist.
2095
2096
2097Release 2002b - 2002-01-28 12:56:03 -0500
2098
2099  [These change notes are for Release 2002a, which was corrupted.
2100  2002b was a corrected version of 2002a.]
2101
2102  changes by Paul Eggert
2103
2104  Update the "leapseconds" file to note that there'll be no leap
2105  second at the end of June, 2002.
2106
2107  Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone.
2108
2109  Change to "difftime.c" to avoid sizeof problems.
2110
2111
2112Release 2001d - 2001-10-09 13:31:32 -0400
2113
2114  changes by Paul Eggert
2115
2116
2117Release 2001c - 2001-06-05 13:59:55 -0400
2118
2119  changes by Paul Eggert and Andrew Brown
2120
2121
2122Release 2001b - 2001-04-05 16:44:38 -0400
2123
2124  changes by Paul Eggert (modulo jnorgard's typo fix)
2125
2126  tz-art.htm has been HTMLified.
2127
2128
2129Release 2001a - 2001-03-13 12:57:44 -0500
2130
2131  changes by Paul Eggert
2132
2133  An addition to the "leapseconds" file: comments with the text of the
2134  latest IERS leap second notice.
2135
2136  Trailing white space has been removed from data file lines, and
2137  repeated spaces in "Rule Jordan" lines in the "asia" file have been
2138  converted to tabs.
2139
2140
2141Release 2000h - 2000-12-14 15:33:38 -0500
2142
2143  changes by Paul Eggert
2144
2145  one typo fix in the "art" file
2146
2147  With providence, this is the last update of the millennium.
2148
2149
2150Release 2000g - 2000-10-10 11:35:22 -0400
2151
2152  changes by Paul Eggert
2153
2154  correction of John Mackin's name submitted by Robert Elz
2155
2156  Garry Shandling's Daylight Saving Time joke (!?!) from the recent
2157  Emmy Awards broadcast.
2158
2159
2160Release 2000f - 2000-08-10 09:31:58 -0400
2161
2162  changes by Paul Eggert
2163
2164  Added information in "tz-art.htm" on a Seinfeld reference to DST.
2165
2166  Error checking and messages in the "yearistype" script have been
2167  improved.
2168
2169
2170Release 2000e - 2000-07-31 09:27:54 -0400
2171
2172  data changes by Paul Eggert
2173
2174  a change to the default value of the defined constant HAVE_STRERROR
2175
2176  the addition of a Dave Barry quote on DST to the tz-arts file
2177
2178
2179Release 2000d - 2000-04-20 15:43:04 -0400
2180
2181  changes to the documentation and code of strftime for C99 conformance
2182
2183  a bug fix for date.c
2184
2185  These are based on (though modified from) changes by Paul Eggert.
2186
2187
2188Release 2000c - 2000-03-04 10:31:43 -0500
2189
2190  changes by Paul Eggert
2191
2192
2193Release 2000b - 2000-02-21 12:16:29 -0500
2194
2195  changes by Paul Eggert and Joseph Myers
2196
2197  modest tweaks to the tz-art.htm and tz-link.htm files
2198
2199
2200Release 2000a - 2000-01-18 09:21:26 -0500
2201
2202  changes by Paul Eggert
2203
2204  The two hypertext documents have also been renamed.
2205
2206
2207Release code1999i-data1999j - 1999-11-15 18:43:22 -0500
2208
2209  Paul Eggert's changes
2210
2211  additions to the "zic" manual page and the "Arts.htm" file
2212
2213
2214Release code1999h-data1999i - 1999-11-08 14:55:21 -0500
2215
2216  [not summarized]
2217
2218
2219Release data1999h - 1999-10-07 03:50:29 -0400
2220
2221  changes by Paul Eggert to "europe" (most importantly, fixing
2222  Lithuania and Estonia)
2223
2224
2225Release 1999g - 1999-09-28 11:06:18 -0400
2226
2227  data changes by Paul Eggert (most importantly, the change for
2228  Lebanon that buys correctness for this coming Sunday)
2229
2230  The "code" file contains changes to "Makefile" and "checktab.awk" to
2231  allow better checking of time zone files before they are published.
2232
2233
2234Release 1999f - 1999-09-23 09:48:14 -0400
2235
2236  changes by Arthur David Olson and Paul Eggert
2237
2238
2239Release 1999e - 1999-08-17 15:20:54 -0400
2240
2241  changes circulated by Paul Eggert, although the change to handling
2242  of DST-specifying time zone names has been commented out for now
2243  (search for "XXX" in "localtime.c" for details).  These files also
2244  do not make any changes to the start of DST in Brazil.
2245
2246  In addition to Paul's changes, there are updates to "Arts.htm" and
2247  cleanups of URLs.
2248
2249
2250Release 1999d - 1999-03-30 11:31:07 -0500
2251
2252  changes by Paul Eggert
2253
2254  The Makefile's "make public" rule has also been changed to do a test
2255  compile of each individual time zone data file (which should help
2256  avoid problems such as the one we had with Nicosia).
2257
2258
2259Release 1999c - 1999-03-25 09:47:47 -0500
2260
2261  changes by Paul Eggert, most importantly the change for Chile.
2262
2263
2264Release 1999b - 1999-02-01 17:51:44 -0500
2265
2266  changes by Paul Eggert
2267
2268  code changes (suggested by Mani Varadarajan, mani at be.com) for
2269  correct handling of symbolic links when building using a relative directory
2270
2271  code changes to generate correct messages for failed links
2272
2273  updates to the URLs in Arts.htm
2274
2275
2276Release 1999a - 1999-01-19 16:20:29 -0500
2277
2278  error message internationalizations and corrections in zic.c and
2279  zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz,
2280  to whom thanks!)
2281
2282
2283Release code1998h-data1998i - 1998-10-01 09:56:10 -0400
2284
2285  changes for Brazil, Chile, and Germany
2286
2287  support for use of "24:00" in the input files for the time zone compiler
2288
2289
2290Release code1998g-data1998h - 1998-09-24 10:50:28 -0400
2291
2292  changes by Paul Eggert
2293
2294  correction to a define in the "private.h" file
2295
2296
2297Release data1998g - 1998-08-11 03:28:35 -0000
2298  [tzdata1998g.tar.gz is missing!]
2299
2300  Lithuanian change provided by mgedmin at pub.osf.it
2301
2302  Move creation of the GMT link with Etc/GMT to "etcetera" (from
2303  "backward") to ensure that the GMT file is created even where folks
2304  don't want the "backward" links (as suggested by Paul Eggert).
2305
2306
2307Release data1998f - 1998-07-20 13:50:00 -0000
2308  [tzdata1998f.tar.gz is missing!]
2309
2310  Update the "leapseconds" file to include the newly-announced
2311  insertion at the end of 1998.
2312
2313
2314Release code1998f - 1998-06-01 10:18:31 -0400
2315
2316  addition to localtime.c by Guy Harris
2317
2318
2319Release 1998e - 1998-05-28 09:56:26 -0400
2320
2321  The Makefile is changed to produce zoneinfo-posix rather than
2322  zoneinfo/posix, and to produce zoneinfo-leaps rather than
2323  zoneinfo/right.
2324
2325  data changes by Paul Eggert
2326
2327  changes from Guy Harris to provide asctime_r and ctime_r
2328
2329  A usno1998 file (substantially identical to usno1997) has been added.
2330
2331
2332Release 1998d - 1998-05-14 11:58:34 -0400
2333
2334  changes to comments (in particular, elimination of references to CIA maps).
2335  "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places
2336  where changes occur.
2337
2338
2339Release 1998c - 1998-02-28 12:32:26 -0500
2340
2341  changes by Paul Eggert (save the "French correction," on which I'll
2342  wait for the dust to settle)
2343
2344  symlink changes
2345
2346  changes and additions to Arts.htm
2347
2348
2349Release 1998b - 1998-01-17 14:31:51 -0500
2350
2351  URL cleanups and additions
2352
2353
2354Release 1998a - 1998-01-13 12:37:35 -0500
2355
2356  changes by Paul Eggert
2357
2358
2359Release code1997i-data1997k - 1997-12-29 09:53:41 -0500
2360
2361  changes by Paul Eggert, with minor modifications from Arthur David
2362  Olson to make the files more browser friendly
2363
2364
2365Release code1997h-data1997j - 1997-12-18 17:47:35 -0500
2366
2367  minor changes to put "TZif" at the start of each time zone information file
2368
2369  a rule has also been added to the Makefile so you can
2370	make zones
2371  to just recompile the zone information files (rather than doing a
2372  full "make install" with its other effects).
2373
2374
2375Release data1997i - 1997-10-07 08:45:38 -0400
2376
2377  changes to Africa by Paul Eggert
2378
2379
2380Release code1997g-data1997h - 1997-09-04 16:56:54 -0400
2381
2382  corrections for Uruguay (and other locations)
2383
2384  Arthur David Olson's simple-minded fix allowing mktime to both
2385  correctly handle leap seconds and correctly handle tm_sec values
2386  upon which arithmetic has been performed.
2387
2388
2389Release code1997f-data1997g - 1997-07-19 13:15:02 -0400
2390
2391  Paul Eggert's updates
2392
2393  a small change to a function prototype;
2394
2395  "Music" has been renamed "Arts.htm", HTMLified, and augmented to
2396  include information on Around the World in Eighty Days.
2397
2398
2399Release code1997e-data1997f - 1997-05-03 18:52:34 -0400
2400
2401  fixes to zic's error handling
2402
2403  changes inspired by the item circulated on Slovenia
2404
2405  The description of Web resources has been HTMLified for browsing
2406  convenience.
2407
2408  A new piece of tz-related music has been added to the "Music" file.
2409
2410
2411Release code1997d-data1997e - 1997-03-29 12:48:52 -0500
2412
2413  Paul Eggert's latest suggestions
2414
2415
2416Release code1997c-data1997d - 1997-03-07 20:37:54 -0500
2417
2418  changes to "zic.c" to correct performance of the "-s" option
2419
2420  a new file "usno1997"
2421
2422
2423Release data1997c - 1997-03-04 09:58:18 -0500
2424
2425  changes in Israel
2426
2427
2428Release 1997b - 1997-02-27 18:34:19 -0500
2429
2430  The data file incorporates the 1997 leap second.
2431
2432  The code file incorporates Arthur David Olson's take on the
2433  zic/multiprocessor/directory-creation situation.
2434
2435
2436Release 1997a - 1997-01-21 09:11:10 -0500
2437
2438  Paul Eggert's Antarctica (and other changes)
2439
2440  Arthur David Olson finessed the "getopt" issue by checking against
2441  both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1
2442  is returned while SunOS 5.5's manual says EOF is returned).
2443
2444
2445Release code1996o-data1996n - 1996-12-27 21:42:05 -0500
2446
2447  Paul Eggert's latest changes
2448
2449
2450Release code1996n - 1996-12-16 09:42:02 -0500
2451
2452  link snapping fix from Bruce Evans (via Garrett Wollman)
2453
2454
2455Release data1996m - 1996-11-24 02:37:34 -0000
2456  [tzdata1996m.tar.gz is missing!]
2457
2458  Paul Eggert's batch of changes
2459
2460
2461Release code1996m-data1996l - 1996-11-05 14:00:12 -0500
2462
2463  No functional changes here; the files have simply been changed to
2464  make more use of ISO style dates in comments. The names of the above
2465  files now include the year in full.
2466
2467
2468Release code96l - 1996-09-08 17:12:20 -0400
2469
2470  tzcode96k was missing a couple of pieces.
2471
2472
2473Release 96k - 1996-09-08 16:06:22 -0400
2474
2475  the latest round of changes from Paul Eggert
2476
2477  the recent Year 2000 material
2478
2479
2480Release code96j - 1996-07-30 13:18:53 -0400
2481
2482  Set sp->typecnt as suggested by Timothy Patrick Murphy.
2483
2484
2485Release code96i - 1996-07-27 20:11:35 -0400
2486
2487  Paul's suggested patch for strftime %V week numbers
2488
2489
2490Release data96i - 1996-07-01 18:13:04 -0400
2491
2492  "northamerica" and "europe" changes by Paul Eggert
2493
2494
2495Release code96h - 1996-06-05 08:02:21 -0400
2496
2497  fix for handling transitions specified in Universal Time
2498
2499  Some "public domain" notices have also been added.
2500
2501
2502Release code96g - 1996-05-16 14:00:26 -0400
2503
2504  fix for the simultaneous-DST-and-zone-change challenge
2505
2506
2507Release data96h - 1996-05-09 17:40:51 -0400
2508
2509  changes by Paul Eggert
2510
2511
2512Release code96f-data96g - 1996-05-03 03:09:59 -0000
2513  [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!]
2514
2515  The changes get us some of the way to fixing the problems noted in Paul
2516  Eggert's letter yesterday (in addition to a few others).  The approach
2517  has been to make zic a bit smarter about figuring out what time zone
2518  abbreviations apply just after the time specified in the "UNTIL" part
2519  of a zone line.  Putting the smarts in zic means avoiding having
2520  transition times show up in both "Zone" lines and "Rule" lines, which
2521  in turn avoids multiple transition time entries in time zone files.
2522  (This also makes the zic input files such as "europe" a bit shorter and
2523  should ease maintenance.)
2524
2525
2526Release data96f - 1996-04-19 19:20:03 -0000
2527  [tzdata96f.tar.gz is missing!]
2528
2529  The only changes are to the "northamerica" file; the time zone
2530  abbreviation for Denver is corrected to MST (and MDT), and the
2531  comments for Mexico have been updated.
2532
2533
2534Release data96e - 1996-03-19 17:37:26 -0500
2535
2536  Proposals by Paul Eggert, in particular the Portugal change that
2537  comes into play at the end of this month.
2538
2539
2540Release data96d - 1996-03-18 20:49:39 -0500
2541
2542  [not summarized]
2543
2544
2545Release code96e - 1996-02-29 15:43:27 -0000
2546  [tzcode96e.tar.gz is missing!]
2547
2548  internationalization changes and the fix to the documentation for strftime
2549
2550
2551Release code96d-data96c - 1996-02-12 11:05:27 -0500
2552
2553  The "code" file simply updates Bob Kridle's electronic address.
2554
2555  The "data" file updates rules for Mexico.
2556
2557
2558Release data96b - 1996-01-27 15:44:42 -0500
2559
2560  Kiribati change
2561
2562
2563Release code96c - 1996-01-16 16:58:15 -0500
2564
2565  leap-year streamlining and binary-search changes
2566
2567  fix to newctime.3
2568
2569
2570Release code96b - 1996-01-10 20:42:39 -0500
2571
2572  fixes and enhancements from Paul Eggert, including code that
2573  emulates the behavior of recent versions of the SunOS "date"
2574  command.
2575
2576
2577Release 96a - 1996-01-06 09:08:24 -0500
2578
2579  Israel updates
2580
2581  fixes to strftime.c for correct ISO 8601 week number generation,
2582  plus support for two new formats ('G' and 'g') to give ISO 8601 year
2583  numbers (which are not necessarily the same as calendar year numbers)
2584
2585
2586Release code95i-data95m - 1995-12-21 12:46:47 -0500
2587
2588  The latest revisions from Paul Eggert are included, the usno1995
2589  file has been updated, and a new file ("WWW") covering useful URLs
2590  has been added.
2591
2592
2593Release code95h-data95l - 1995-12-19 18:10:12 -0500
2594
2595  A simplification of a macro definition, a change to data for Sudan,
2596  and (for last minute shoppers) notes in the "Music" file on the CD
2597  "Old Man Time".
2598
2599
2600Release code95g-data95k - 1995-10-30 10:32:47 -0500
2601
2602  (slightly reformatted) 8-bit-clean proposed patch
2603
2604  minor patch: US/Eastern -> America/New_York
2605
2606  snapshot of the USNO's latest data ("usno1995")
2607
2608  some other minor cleanups
2609
2610
2611Release code95f-data95j - 1995-10-28 21:01:34 -0000
2612  [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!]
2613
2614  European cleanups
2615
2616  support for 64-bit time_t's
2617
2618  optimization in localtime.c
2619
2620
2621Release code95e - 1995-10-13 13:23:57 -0400
2622
2623  the mktime change to scan from future to past when trying to find time zone
2624  offsets
2625
2626
2627Release data95i - 1995-09-26 10:43:26 -0400
2628
2629  For Canada/Central, guess that the Sun customer's "one week too
2630  early" was just a approximation, and the true error is one month
2631  too early.  This is consistent with the rest of Canada.
2632
2633
2634Release data95h - 1995-09-21 11:26:48 -0400
2635
2636  latest changes from Paul Eggert
2637
2638
2639Release code95d - 1995-09-14 11:14:45 -0400
2640
2641  the addition of a "Music" file, which documents four recorded
2642  versions of the tune "Save That Time".
2643
2644
2645Release data95g - 1995-09-01 17:21:36 -0400
2646
2647  "yearistype" correction
2648
2649
2650Release data95f - 1995-08-28 20:46:56 -0400
2651
2652  Paul Eggert's change to the australasia file
2653
2654
2655Release data95e - 1995-07-08 18:02:34 -0400
2656
2657  The only change is a leap second at the end of this year.
2658  Thanks to Bradley White for forwarding news on the leap second.
2659
2660
2661Release data95d - 1995-07-03 13:26:22 -0400
2662
2663  Paul Eggert's changes
2664
2665
2666Release data95c - 1995-07-02 19:19:28 -0400
2667
2668  changes to "asia", "backward", "europe", and "southamerica"
2669  (read: northamericacentrics need not apply)
2670
2671
2672Release code95c - 1995-03-13 14:00:46 -0500
2673
2674  one-line fix for sign extension problems in detzcode
2675
2676
2677Release 95b - 1995-03-04 11:22:38 -0500
2678
2679  Minor changes in both:
2680
2681  The "code" file contains a workaround for the lack of "unistd.h" in
2682  Microsoft C++ version 7.
2683
2684  The "data" file contains a fixed "Link" for America/Shiprock.
2685
2686
2687Release 94h - 1994-12-10 12:51:14 -0500
2688
2689  The files:
2690
2691  *	incorporate the changes to "zdump" and "date" to make changes to
2692	the "TZ" environment variable permanent;
2693
2694  *	incorporate the table changes by Paul Eggert;
2695
2696  *	include (and document) support for universal time specifications in
2697	data files - but do not (yet) include use of this feature in the
2698	data files.
2699
2700  Think of this as "TZ Classic" - the software has been set up not to break if
2701  universal time shows up in its input, and data entries have been
2702  left as is so as not to break existing implementations.
2703
2704
2705Release data94f - 1994-08-20 12:56:09 -0400
2706
2707  (with thanks!) the latest data updates from Paul Eggert
2708
2709
2710Release data94e - 1994-06-04 13:13:53 -0400
2711
2712  [not summarized]
2713
2714
2715Release code94g - 1994-05-05 12:14:07 -0400
2716
2717  fix missing "optind.c" and a reference to it in the Makefile
2718
2719
2720Release code94f - 1994-05-05 13:00:33 -0000
2721  [tzcode94f.tar.gz is missing!]
2722
2723  changes to avoid overflow in difftime, as well as changes to cope
2724  with the 52/53 challenge in strftime
2725
2726
2727Release code94e - 1994-03-30 23:32:59 -0500
2728
2729  change for the benefit of PCTS
2730
2731
2732Release 94d - 1994-02-24 15:42:25 -0500
2733
2734  Avoid clashes with POSIX semantics for zones such as GMT+4.
2735
2736  Some other very minor housekeeping is also present.
2737
2738
2739Release code94c - 1994-02-10 08:52:40 -0500
2740
2741  Fix bug where mkdirs was broken unless you compile with
2742  -fwritable-strings (which is generally losing to do).
2743
2744
2745Release 94b - 1994-02-07 10:04:33 -0500
2746
2747  work by Paul Eggert who notes:
2748
2749  I found another book of time zone histories by E W Whitman; it's not
2750  as extensive as Shanks but has a few goodies of its own.  I used it
2751  to update the tables.  I also fixed some more as a result of
2752  correspondence with Adam David and Peter Ilieve, and move some stray
2753  links from 'europe' to 'backward'.  I corrected some scanning errors
2754  in usno1989.
2755
2756  As far as the code goes, I fixed zic to allow years in the range
2757  INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900.
2758  And I cleaned up the zic documentation a little bit.
2759
2760
2761Release data94a - 1994-02-03 08:58:54 -0500
2762
2763  It simply incorporates the recently announced leap second into the
2764  "leapseconds" file.
2765
2766
2767Release 93g - 1993-11-22 17:28:27 -0500
2768
2769  Paul Eggert has provided a good deal of historic information (based
2770  on Shanks), and there are some code changes to deal with the buglets
2771  that crawled out in dealing with the new information.
2772
2773
2774Release 93f - 1993-10-15 12:27:46 -0400
2775
2776  Paul Eggert's changes
2777
2778
2779Release 93e - 1993-09-05 21:21:44 -0400
2780
2781  This has updated data for Israel, England, and Kwajalein.  There's
2782  also an update to "zdump" to cope with Kwajalein's 24-hour jump.
2783  Thanks to Paul Eggert and Peter Ilieve for the changes.
2784
2785
2786Release 93d - 1993-06-17 23:34:17 -0400
2787
2788  new fix and new data on Israel
2789
2790
2791Release 93c - 1993-06-06 19:31:55 -0400
2792
2793  [not summarized]
2794
2795
2796Release 93b - 1993-02-02 14:53:58 -0500
2797
2798  updated "leapseconds" file
2799
2800
2801Release 93 - 1993-01-08 07:01:06 -0500
2802
2803  At kre's suggestion, the package has been split in two - a code piece
2804  (which also includes documentation) that's only of use to folks who
2805  want to recompile things and a data piece useful to anyone who can
2806  run "zic".
2807
2808  The new version has a few changes to the data files, a few
2809  portability changes, and an off-by-one fix (with thanks to
2810  Tom Karzes at deshaw.com for providing a description and a
2811  solution).
2812
2813
2814Release 92c - 1992-11-21 17:35:36 -0000
2815  [tz92c.tar.Z is missing!]
2816
2817  The fallout from the latest round of DST transitions.
2818
2819  There are changes for Portugal, Saskatchewan, and "Pacific-New";
2820  there's also a change to "zic.c" that makes it portable to more systems.
2821
2822
2823Release 92 - 1992-04-25 18:17:03 -0000
2824  [tz92.tar.Z is missing!]
2825
2826  By popular demand (well, at any rate, following a request by kre at munnari)
2827
2828
2829The 1989 update of the time zone package featured:
2830
2831  *	POSIXization (including interpretation of POSIX-style TZ environment
2832	variables, provided by Guy Harris),
2833  *	ANSIfication (including versions of "mktime" and "difftime"),
2834  *	SVIDulation (an "altzone" variable)
2835  *	MACHination (the "gtime" function)
2836  *	corrections to some time zone data (including corrections to the rules
2837	for Great Britain and New Zealand)
2838  *	reference data from the United States Naval Observatory for folks who
2839	want to do additional time zones
2840  *	and the 1989 data for Saudi Arabia.
2841
2842  (Since this code will be treated as "part of the implementation" in some
2843  places and as "part of the application" in others, there's no good way to
2844  name functions, such as timegm, that are not part of the proposed ANSI C
2845  standard; such functions have kept their old, underscore-free names in this
2846  update.)
2847
2848  And the "dysize" function has disappeared; it was present to allow
2849  compilation of the "date" command on old BSD systems, and a version of "date"
2850  is now provided in the package.  The "date" command is not created when you
2851  "make all" since it may lack options provided by the version distributed with
2852  your operating system, or may not interact with the system in the same way
2853  the native version does.
2854
2855  Since POSIX frowns on correct leap second handling, the default behavior of
2856  the "zic" command (in the absence of a "-L" option) has been changed to omit
2857  leap second information from its output files.
2858
2859
2860-----
2861Notes
2862
2863This file contains copies of the part of each release announcement
2864that talks about the changes in that release.  The text has been
2865adapted and reformatted for the purposes of this file.
2866
2867Typically a release R consists of a pair of tarball files,
2868tzcodeR.tar.gz and tzdataR.tar.gz.  However, some releases (e.g.,
2869code2010a, data2012c) consist of just one or the other tarball, and a
2870few (e.g., code2012c-data2012d) have tarballs with mixed version
2871numbers.
2872
2873Release time stamps are taken from the release's commit (for newer,
2874git releases), from the newest file in the tarball (for older
2875releases, where this info is available) or from the email announcing
2876the release (if all else fails; these are marked with a time zone of
2877-0000 and an "is missing!" comment).
2878
2879Earlier versions of the code and data were not announced on the tz
2880list and are not summarized here.
2881
2882This file is in the public domain.
2883
2884Local Variables:
2885coding: utf-8
2886End:
2887