NEWS revision 1.7 
1News for the tz database
2
3Release 2014i - 2014-10-21 22:04:57 -0700
4
5  Changes affecting future time stamps
6
7    Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00.
8    (Thanks to Ken Rylander for the heads-up.)  Guess that future
9    years will use a similar pattern.
10
11    A new Zone Pacific/Bougainville, for the part of Papua New Guinea
12    that plans to switch from UTC+10 to UTC+11 on 2014-12-28 at 02:00.
13    (Thanks to Kiley Walbom for the heads-up.)
14
15  Changes affecting time zone abbreviations
16
17    Since Belarus is not changing its clocks even though Moscow is,
18    the time zone abbreviation in Europe/Minsk is changing from FET
19    to its more-traditional value MSK on 2014-10-26 at 01:00.
20    (Thanks to Alexander Bokovoy for the heads-up about Belarus.)
21
22    The new abbreviation IDT stands for the pre-1976 use of UT+8 in
23    Indochina, to distinguish it better from ICT (UT+7).
24
25  Changes affecting past time stamps
26
27    Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976
28    (thanks to Trần Ngọc Quân for an indirect pointer to Trần Tiến Bình's
29    authoritative book).  Asia/Ho_Chi_Minh has been added to
30    zone1970.tab, to give tzselect users in Vietnam two choices,
31    since north and south Vietnam disagreed after our 1970 cutoff.
32
33    Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as
34    they differed from existing zones only for older time stamps.  As
35    usual, these changes affect pre-1970 time stamps only.  Their old
36    contents have been moved to the 'backzone' file.
37
38  Changes affecting code
39
40    The time-related library functions now set errno on failure, and
41    some crashes in the new tzalloc-related library functions have
42    been fixed.  (Thanks to Christos Zoulas for reporting most of
43    these problems and for suggesting fixes.)
44
45    If USG_COMPAT is defined and the requested time stamp is standard time,
46    the tz library's localtime and mktime functions now set the extern
47    variable timezone to a value appropriate for that time stamp; and
48    similarly for ALTZONE, daylight saving time, and the altzone variable.
49    This change is a companion to the tzname change in 2014h, and is
50    designed to make timezone and altzone more compatible with tzname.
51
52    The tz library's functions now set errno to EOVERFLOW if they fail
53    because the result cannot be represented.  ctime and ctime_r now
54    return NULL and set errno when a time stamp is out of range, rather
55    than having undefined behavior.
56
57    Some bugs associated with the new 2014g functions have been fixed.
58    This includes a bug that largely incapacitated the new functions
59    time2posix_z and posix2time_z.  (Thanks to Christos Zoulas.)
60    It also includes some uses of uninitialized variables after tzalloc.
61    The new code uses the standard type 'ssize_t', which the Makefile
62    now gives porting advice about.
63
64  Changes affecting commentary
65
66    Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis).
67
68
69Release 2014h - 2014-09-25 18:59:03 -0700
70
71  Changes affecting past time stamps
72
73    America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28.
74
75    Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01,
76    not 1920-01-06.  The old entry was based on a misinterpretation of Shanks.
77
78    Some more zones have been turned into links, when they differed
79    from existing zones only for older time stamps.  As usual,
80    these changes affect UTC offsets in pre-1970 time stamps only.
81    Their old contents have been moved to the 'backzone' file.
82    The affected zones are: Africa/Blantyre, Africa/Bujumbura,
83    Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
84    Africa/Lusaka, Africa/Maseru, and Africa/Mbabane.
85
86  Changes affecting code
87
88    zdump -V and -v now output gmtoff= values on all platforms,
89    not merely on platforms defining TM_GMTOFF.
90
91    The tz library's localtime and mktime functions now set tzname to a value
92    appropriate for the requested time stamp, and zdump now uses this
93    on platforms not defining TM_ZONE, fixing a 2014g regression.
94    (Thanks to Tim Parenti for reporting the problem.)
95
96    The tz library no longer sets tzname if localtime or mktime fails.
97
98    zdump -c no longer mishandles transitions near year boundaries.
99    (Thanks to Tim Parenti for reporting the problem.)
100
101    An access to uninitalized data has been fixed.
102    (Thanks to Jörg Richter for reporting the problem.)
103
104    When THREAD_SAFE is defined, the code ports to the C11 memory model.
105    A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined
106    and two threads race to initialize data used by gmtime-like functions.
107    (Thanks to Andy Heninger for reporting the problems.)
108
109  Changes affecting build procedure
110
111    'make check' now checks better for properly-sorted data.
112
113  Changes affecting documentation and commentary
114
115    zdump's gmtoff=N output is now documented, and its isdst=D output
116    is now documented to possibly output D values other than 0 or 1.
117
118    zdump -c's treatment of years is now documented to use the
119    Gregorian calendar and Universal Time without leap seconds,
120    and its behavior at cutoff boundaries is now documented better.
121    (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.)
122
123    Programs are now documented to use the proleptic Gregorian calendar.
124    (Thanks to Alan Barrett for the suggestion.)
125
126    Fractional-second GMT offsets have been documented for civil time
127    in 19th-century Chennai, Jakarta, and New York.
128
129
130Release 2014g - 2014-08-28 12:31:23 -0700
131
132  Changes affecting future time stamps
133
134    Turks & Caicos is switching from US eastern time to UTC-4 year-round,
135    modeled as a switch from EST/EDT to AST on 2014-11-02 at 02:00.
136
137  Changes affecting past time stamps
138
139    Time in Russia or the USSR before 1926 or so has been corrected by
140    a few seconds in the following zones: Asia/Irkutsk,
141    Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi,
142    Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara.  For
143    Asia/Yekaterinburg the correction is a few minutes.  (Thanks to
144    Vladimir Karpinsky.)
145
146    The Portuguese decree of 1911-05-26 took effect on 1912-01-01.
147    This affects 1911 time stamps in Africa/Bissau, Africa/Luanda,
148    Atlantic/Azores, and Atlantic/Madeira.  Also, Lisbon's pre-1912
149    GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32.
150    (Thanks to Stephen Colebourne for pointing to the decree.)
151
152    Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59.
153
154    A new file 'backzone' contains data which may appeal to
155    connoisseurs of old time stamps, although it is out of scope for
156    the tz database, is often poorly sourced, and contains some data
157    that is known to be incorrect.  The new file is not recommended
158    for ordinary use and its entries are not installed by default.
159    (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and
160    Isle of Man entries.)
161
162    Some more zones have been turned into links, when they differed
163    from existing zones only for older time stamps.  As usual,
164    these changes affect UTC offsets in pre-1970 time stamps only.
165    Their old contents have been moved to the 'backzone' file.
166    The affected zones are: Africa/Bangui, Africa/Brazzaville,
167    Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda,
168    Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo.
169
170  Changes affecting code
171
172    Unless NETBSD_INSPIRED is defined to 0, the tz library now
173    supplies functions for creating and using objects that represent
174    time zones. The new functions are tzalloc, tzfree, localtime_rz,
175    mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and
176    time2posix_z.  They are intended for performance: for example,
177    localtime_rz (unlike localtime_r) is trivially thread-safe without
178    locking.  (Thanks to Christos Zoulas for proposing NetBSD-inspired
179    functions, and to Alan Barrett and Jonathan Lennox for helping to
180    debug the change.)
181
182    zdump now builds with the tz library unless USE_LTZ is defined to 0,
183    This lets zdump use tz features even if the system library lacks them.
184    To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0
185    TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='.
186
187    zdump now uses localtime_rz if available, as it's significantly faster,
188    and it can help zdump better diagnose invalid time zone names.
189    Define HAVE_LOCALTIME_RZ to 0 to suppress this.  HAVE_LOCALTIME_RZ
190    defaults to 1 if NETBSD_INSPIRED && USE_LTZ.  When localtime_rz is
191    not available, zdump now uses localtime_r and tzset if available,
192    as this is a bit cleaner and faster than plain localtime.  Compile
193    with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system
194    lacks these two functions.
195
196    If THREAD_SAFE is defined to 1, the tz library is now thread-safe.
197    Although not needed for tz's own applications, which are single-threaded,
198    this supports POSIX better if the tz library is used in multithreaded apps.
199
200    Some crashes have been fixed when zdump or the tz library is given
201    invalid or outlandish input.
202
203    The tz library no longer mishandles leap seconds on platforms with
204    unsigned time_t in time zones that lack ordinary transitions after 1970.
205
206    The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not
207    already defined, to make it easier to configure on common platforms.
208    Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this.
209
210    Unless the new macro UNINIT_TRAP is defined to 1, the tz code now
211    assumes that reading uninitialized memory yields garbage values
212    but does not cause other problems such as traps.
213
214    If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now
215    more likely to guess right for ambiguous time stamps near
216    transitions where tm_isdst does not change.
217
218    If HAVE_STRFTIME_L is defined to 1, the tz library now defines
219    strftime_l for compatibility with recent versions of POSIX.
220    Only the C locale is supported, though.  HAVE_STRFTIME_L defaults
221    to 1 on recent POSIX versions, and to 0 otherwise.
222
223    tzselect -c now uses a hybrid distance measure that works better
224    in Africa.  (Thanks to Alan Barrett for noting the problem.)
225
226    The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used,
227    or when time_tz is defined.
228
229    When HAVE_UTMPX_H is set the 'date' command now builds on systems
230    whose <utmpx.h> file does not define WTMPX_FILE, and when setting
231    the date it updates the wtmpx file if _PATH_WTMPX is defined.
232    This affects GNU/Linux and similar systems.
233
234    For easier maintenance later, some C code has been simplified,
235    some lint has been removed, and the code has been tweaked so that
236    plain 'make' is more likely to work.
237
238    The C type 'bool' is now used for boolean values, instead of 'int'.
239
240    The long-obsolete LOCALE_HOME code has been removed.
241
242    The long-obsolete 'gtime' function has been removed.
243
244  Changes affecting build procedure
245
246    'zdump' no longer links in ialloc.o, as it's not needed.
247
248    'make check_time_t_alternatives' no longer assumes GNU diff.
249
250  Changes affecting distribution tarballs
251
252    The files checktab.awk and zoneinfo2tdf.pl are now distributed in
253    the tzdata tarball instead of the tzcode tarball, since they help
254    maintain the data.  The NEWS and Theory files are now also
255    distributed in the tzdata tarball, as they're relevant for data.
256    (Thanks to Alan Barrett for pointing this out.)  Also, the
257    leapseconds.awk file is no longer distributed in the tzcode
258    tarball, since it belongs in the tzdata tarball (where 2014f
259    inadvertently also distributed it).
260
261  Changes affecting documentation and commentary
262
263    A new file CONTRIBUTING is distributed.  (Thanks to Tim Parenti for
264    suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms
265    for debugging it.)
266
267    The man pages have been updated to use function prototypes,
268    to document thread-safe variants like localtime_r, and to document
269    the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and
270    mktime_z.
271
272    The fields in Link lines have been renamed to be more descriptive
273    and more like the parameters of 'ln'.  LINK-FROM has become TARGET,
274    and LINK-TO has become LINK-NAME.
275
276    tz-link.htm mentions the IETF's tzdist working group; Windows
277    Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab.
278
279    Some broken URLs have been fixed in the commentary.  (Thanks to
280    Lester Caine.)
281
282    Commentary about Philippines DST has been updated, and commentary
283    on pre-1970 time in India has been added.
284
285
286Release 2014f - 2014-08-05 17:42:36 -0700
287
288  Changes affecting future time stamps
289
290    Russia will subtract an hour from most of its time zones on 2014-10-26
291    at 02:00 local time.  (Thanks to Alexander Krivenyshev.)
292    There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky
293    Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug
294    (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast
295    (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic
296    (Europe/Samara) are not changing their clocks.  The changed zones are
297    Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd,
298    Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk,
299    Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga,
300    Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours
301    subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected,
302    but not its UTC offset.  Two zones are added: Asia/Chita (split
303    from Asia/Yakutsk, and also with two hours subtracted) and
304    Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour
305    subtracted).  (Thanks to Tim Parenti for much of the above.)
306
307  Changes affecting time zone abbreviations
308
309    Australian eastern time zone abbreviations are now AEST/AEDT not EST,
310    and similarly for the other Australian zones.  That is, for eastern
311    standard and daylight saving time the abbreviations are AEST and AEDT
312    instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT,
313    and AWST/AWDT are now used instead of the former CST, CWST, and WST.
314    This change does not affect UTC offsets, only time zone abbreviations.
315    (Thanks to Rich Tibbett and many others.)
316
317    Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UTC+7)
318    effective 2014-10-26 at 02:00 local time.
319
320    The time zone abbreviation for Xinjiang Time (observed in Ürümqi)
321    has been changed from URUT to XJT.  (Thanks to Luther Ma.)
322
323    Prefer MSK/MSD for Moscow time in Russia, even in other cities.
324    Similarly, prefer EET/EEST for eastern European time in Russia.
325
326    Change time zone abbreviations in (western) Samoa to use "ST" and
327    "DT" suffixes, as this is more likely to match common practice.
328    Prefix "W" to (western) Samoa time when its standard-time offset
329    disagrees with that of American Samoa.
330
331    America/Metlakatla now uses PST, not MeST, to abbreviate its time zone.
332
333    Time zone abbreviations have been updated for Japan's two time
334    zones used 1896-1937.  JWST now stands for Western Standard
335    Time, and JCST for Central Standard Time (formerly this was CJT).
336    These abbreviations are now used for time in Korea, Taiwan,
337    and Sakhalin while controlled by Japan.
338
339  Changes affecting past time stamps
340
341    China's five zones have been simplified to two, since the post-1970
342    differences in the other three seem to have been imaginary.  The
343    zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been
344    removed; backwards-compatibility links still work, albeit with
345    different behaviors for time stamps before May 1980.  Asia/Urumqi's
346    1980 transition to UTC+8 has been removed, so that it is now at
347    UTC+6 and not UTC+8.  (Thanks to Luther Ma and to Alois Treindl;
348    Treindl sent helpful translations of two papers by Guo Qingsheng.)
349
350    Some zones have been turned into links, when they differed from existing
351    zones only for older UTC offsets where data entries were likely invented.
352    These changes affect UTC offsets in pre-1970 time stamps only.  This is
353    similar to the change in release 2013e, except this time for western
354    Africa.  The affected zones are: Africa/Bamako, Africa/Banjul,
355    Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome,
356    Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and
357    Atlantic/St_Helena.  This also affects the backwards-compatibility
358    link Africa/Timbuktu.  (Thanks to Alan Barrett, Stephen Colebourne,
359    Tim Parenti, and David Patte for reporting problems in earlier
360    versions of this change.)
361
362    Asia/Shanghai's pre-standard-time UT offset has been changed from
363    8:05:57 to 8:05:43, the location of Xujiahui Observatory.  Its
364    transition to standard time has been changed from 1928 to 1901.
365
366    Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01,
367    then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945.
368    In 1946 it observed DST from 05-15 through 09-30; in 1947
369    from 04-15 through 10-31; and in 1979 from 07-01 through 09-30.
370    (Thanks to Yu-Cheng Chuang.)
371
372    Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950.
373
374    Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not
375    10-03 at 00:00.  (Thanks to Konstantin Hyppönen.)
376
377    Pacific/Pago_Pago has been changed from UTC-11:30 to UTC-11 for the period
378    from 1911 to 1950.
379
380    Pacific/Chatham has been changed to New Zealand standard time plus
381    45 minutes for the period before 1957, reflecting a 1956 remark in
382    the New Zealand parliament.
383
384    Europe/Budapest has several pre-1946 corrections: in 1918 the transition
385    out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in
386    1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08
387    not 04-06 at 02:00; and there was no DST in 1920.
388
389    Africa/Accra is now assumed to have observed DST from 1920 through 1935.
390
391    Time in Russia before 1927 or so has been corrected by a few seconds in
392    the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi,
393    Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and
394    Europe/Riga.  Also, Moscow's location has been changed to its Kilometer 0
395    point.  (Thanks to Vladimir Karpinsky for the Moscow changes.)
396
397  Changes affecting data format
398
399    A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data.
400    The new file's extended format allows multiple country codes per zone.
401    The older file is still installed but is deprecated; its format is
402    not changing and it will still be distributed for a while, but new
403    applications should use the new file.
404
405    The new file format simplifies maintenance of obscure locations.
406    To test this, it adds coverage for the Crozet Islands and the
407    Scattered Islands.  (Thanks to Tobias Conradi and Antoine Leca.)
408
409    The file 'iso3166.tab' is planned to switch from ASCII to UTF-8.
410    It is still ASCII now, but commentary about the switch has been added.
411    The new file 'zone1970.tab' already uses UTF-8.
412
413  Changes affecting code
414
415    'localtime', 'mktime', etc. now use much less stack space if ALL_STATE
416    is defined.  (Thanks to Elliott Hughes for reporting the problem.)
417
418    'zic' no longer mishandles input when ignoring case in locales that
419    are not compatible with English, e.g., unibyte Turkish locales when
420    compiled with HAVE_GETTEXT.
421
422    Error diagnostics of 'zic' and 'yearistype' have been reworded so that
423    they no longer use ASCII '-' as if it were a dash.
424
425    'zic' now rejects output file names that contain '.' or '..' components.
426    (Thanks to Tim Parenti for reporting the problem.)
427
428    'zic -v' now warns about output file names that do not follow
429    POSIX rules, or that contain a digit or '.'.  (Thanks to Arthur
430    David Olson for starting the ball rolling on this.)
431
432    Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0.
433
434  Changes affecting build procedure
435
436    'zic' no longer links in localtime.o and asctime.o, as they're not needed.
437    (Thanks to John Cochran.)
438
439  Changes affecting documentation and commentary
440
441    The 'Theory' file documents legacy names, the longstanding
442    exceptions to the POSIX-inspired file name rules.
443
444    The 'zic' documentation clarifies the role of time types when
445    interpreting dates.  (Thanks to Arthur David Olson.)
446
447    Documentation and commentary now prefer UTF-8 to US-ASCII,
448    allowing the use of proper accents in foreign words and names.
449    Code and data have not changed because of this.  (Thanks to
450    Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug
451    this.)
452
453    Non-HTML documentation and commentary now use plain-text URLs instead of
454    HTML insertions, and are more consistent about bracketing URLs when they
455    are not already surrounded by white space.  (Thanks to suggestions by
456    Steffen Nurpmeso.)
457
458    There is new commentary about Xujiahui Observatory, the five time-zone
459    project in China from 1918 to 1949, timekeeping in Japanese-occupied
460    Shanghai, and Tibet Time in the 1950s.  The sharp-eyed can spot the
461    warlord Jin Shuren in the data.
462
463    Commentary about the coverage of each Russian zone has been standardized.
464    (Thanks to Tim Parenti).
465
466    There is new commentary about contemporary timekeeping in Ethiopia.
467
468    Obsolete comments about a 2007 proposal for DST in Kuwait has been removed.
469
470    There is new commentary about time in Poland in 1919.
471
472    Proper credit has been given to DST inventor George Vernon Hudson.
473
474    Commentary about time in Metlakatla, AK and Resolute, NU has been
475    improved, with a new source for the former.
476
477    In zone.tab, Pacific/Easter no longer mentions Salas y Gómez, as it
478    is uninhabited.
479
480    Commentary about permanent Antarctic bases has been updated.
481
482    Several typos have been corrected.  (Thanks to Tim Parenti for
483    contributing some of these fixes.)
484
485    tz-link.htm now mentions the JavaScript libraries Moment Timezone,
486    TimezoneJS.Date, Walltime-js, and Timezone.  (Thanks to a heads-up
487    from Matt Johnson.)  Also, it mentions the Go 'latlong' package.
488    (Thanks to a heads-up from Dirkjan Ochtman.)
489
490    The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998
491    have been removed.  These obsolescent US Naval Observatory entries were no
492    longer helpful for maintenance.  (Thanks to Tim Parenti for the suggestion.)
493
494
495Release 2014e - 2014-06-12 21:53:52 -0700
496
497  Changes affecting near-future time stamps
498
499    Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00.
500    (Thanks to Imed Chihi.)  Guess that from 2015 on Egypt will temporarily
501    switch to standard time at 24:00 the last Thursday before Ramadan, and
502    back to DST at 00:00 the first Friday after Ramadan.
503
504    Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00.  (Thanks
505    to Milamber Space Network.)  Guess that from 2015 on Morocco will
506    temporarily switch to standard time at 03:00 the last Saturday before
507    Ramadan, and back to DST at 02:00 the first Saturday after Ramadan.
508
509  Changes affecting past time stamps
510
511    The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of
512    "MSD" for Moscow's double daylight time in summer 1921.  Also, a typo
513    "VLASST" has been repaired to be "VLAST" for Vladivostok summer time
514    in 1991.  (Thanks to Hank W. for reporting the problems.)
515
516  Changes affecting commentary
517
518    tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the
519    draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and
520    removes stale pointers to World Time Explorer and WORLDTIME.
521
522
523Release 2014d - 2014-05-27 21:34:40 -0700
524
525  Changes affecting code
526
527    zic no longer generates files containing time stamps before the Big Bang.
528    This works around GNOME bug 730332
529    <https://bugzilla.gnome.org/show_bug.cgi?id=730332>.
530    (Thanks to Leonardo Chiquitto for reporting the bug, and to
531    Arthur David Olson and James Cloos for suggesting improvements to the fix.)
532
533  Changes affecting documentation
534
535    tz-link.htm now mentions GNOME.
536
537
538Release 2014c - 2014-05-13 07:44:13 -0700
539
540  Changes affecting near-future time stamps
541
542    Egypt observes DST starting 2014-05-15 at 24:00.
543    (Thanks to Ahmad El-Dardiry and Gunther Vermier.)
544    Details have not been announced, except that DST will not be observed
545    during Ramadan.  Guess that DST will stop during the same Ramadan dates as
546    Morocco, and that Egypt's future spring and fall transitions will be the
547    same as 2010 when it last observed DST, namely April's last Friday at
548    00:00 to September's last Thursday at 23:00 standard time.  Also, guess
549    that Ramadan transitions will be at 00:00 standard time.
550
551  Changes affecting code
552
553    zic now generates transitions for minimum time values, eliminating guesswork
554    when handling low-valued time stamps.  (Thanks to Arthur David Olson.)
555
556    Port to Cygwin sans glibc.  (Thanks to Arthur David Olson.)
557
558  Changes affecting commentary and documentation
559
560    Remove now-confusing comment about Jordan.  (Thanks to Oleksii Nochovnyi.)
561
562
563Release 2014b - 2014-03-24 21:28:50 -0700
564
565  Changes affecting near-future time stamps
566
567    Crimea switches to Moscow time on 2014-03-30 at 02:00 local time.
568    (Thanks to Alexander Krivenyshev.)  Move its zone.tab entry from UA to RU.
569
570    New entry for Troll station, Antarctica.  (Thanks to Paul-Inge Flakstad and
571    Bengt-Inge Larsson.)  This is currently an approximation; a better version
572    will require the zic and localtime fixes mentioned below, and the plan is
573    to wait for a while until at least the zic fixes propagate.
574
575  Changes affecting code
576
577    'zic' and 'localtime' no longer reject locations needing four transitions
578    per year for the foreseeable future.  (Thanks to Andrew Main (Zefram).)
579    Also, 'zic' avoids some unlikely failures due to integer overflow.
580
581  Changes affecting build procedure
582
583    'make check' now detects Rule lines defined but never used.
584    The NZAQ rules, an instance of this problem, have been removed.
585
586  Changes affecting commentary and documentation
587
588    Fix Tuesday/Thursday typo in description of time in Israel.
589    (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.)
590
591    Microsoft Windows 8.1 doesn't support tz database names.  (Thanks
592    to Donald MacQueen.)  Instead, the Microsoft Windows Store app
593    library supports them.
594
595    Add comments about Johnston Island time in the 1960s.
596    (Thanks to Lyle McElhaney.)
597
598    Morocco's 2014 DST start will be as predicted.
599    (Thanks to Sebastien Willemijns.)
600
601
602Release 2014a - 2014-03-07 23:30:29 -0800
603
604  Changes affecting near-future time stamps
605
606    Turkey begins DST on 2014-03-31, not 03-30.  (Thanks to Faruk Pasin for
607    the heads-up, and to Tim Parenti for simplifying the update.)
608
609  Changes affecting past time stamps
610
611    Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00.
612    (Thanks to Steffen Thorsen.)
613
614    Ukraine switched from Moscow to Eastern European time on 1990-07-01
615    (not 1992-01-01), and observed DST during the entire next winter.
616    (Thanks to Vladimir in Moscow via Alois Treindl.)
617
618    In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03.
619    (Thanks to Avigdor Finkelstein.)
620
621  Changes affecting code
622
623    A uninitialized-storage bug in 'localtime' has been fixed.
624    (Thanks to Logan Chien.)
625
626  Changes affecting the build procedure
627
628    The settings for 'make check_web' now default to Ubuntu 13.10.
629
630  Changes affecting commentary and documentation
631
632    The boundary of the US Pacific time zone is given more accurately.
633    (Thanks to Alan Mintz.)
634
635    Chile's 2014 DST will be as predicted.  (Thanks to José Miguel Garrido.)
636
637    Paraguay's 2014 DST will be as predicted.  (Thanks to Carlos Raúl Perasso.)
638
639    Better descriptions of countries with same time zone history as
640    Trinidad and Tobago since 1970.  (Thanks to Alan Barrett for suggestion.)
641
642    Several changes affect tz-link.htm, the main web page.
643
644      Mention Time.is (thanks to Even Scharning) and WX-now (thanks to
645      David Braverman).
646
647      Mention xCal (Internet RFC 6321) and jCal.
648
649      Microsoft has some support for tz database names.
650
651      CLDR data formats include both XML and JSON.
652
653      Mention Maggiolo's map of solar vs standard time.
654      (Thanks to Arthur David Olson.)
655
656      Mention TZ4Net.  (Thanks to Matt Johnson.)
657
658      Mention the timezone-olson Haskell package.
659
660      Mention zeitverschiebung.net.  (Thanks to Martin Jäger.)
661
662      Remove moribund links to daylight-savings-time.info and to
663      Simple Timer + Clocks.
664
665      Update two links.  (Thanks to Oscar van Vlijmen.)
666
667      Fix some formatting glitches, e.g., remove random newlines from
668      abbr elements' title attributes.
669
670
671Release 2013i - 2013-12-17 07:25:23 -0800
672
673  Changes affecting near-future time stamps:
674
675    Jordan switches back to standard time at 00:00 on December 20, 2013.
676    The 2006-2011 transition schedule is planned to resume in 2014.
677    (Thanks to Steffen Thorsen.)
678
679  Changes affecting past time stamps:
680
681    In 2004, Cuba began DST on March 28, not April 4.
682    (Thanks to Steffen Thorsen.)
683
684  Changes affecting code
685
686    The compile-time flag NOSOLAR has been removed, as nowadays the
687    benefit of slightly shrinking runtime table size is outweighed by the
688    cost of disallowing potential future updates that exceed old limits.
689
690  Changes affecting documentation and commentary
691
692    The files solar87, solar88, and solar89 are no longer distributed.
693    They were a negative experiment - that is, a demonstration that
694    tz data can represent solar time only with some difficulty and error.
695    Their presence in the distribution caused confusion, as Riyadh
696    civil time was generally not solar time in those years.
697
698    tz-link.htm now mentions Noda Time.  (Thanks to Matt Johnson.)
699
700
701Release 2013h - 2013-10-25 15:32:32 -0700
702
703  Changes affecting current and future time stamps:
704
705    Libya has switched its time zone back to UTC+2 without DST,
706    instead of UTC+1 with DST.  (Thanks to Even Scharning.)
707
708    Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules.
709    (Thanks to Gwillim Law.)
710
711  Changes affecting future time stamps:
712
713    Acre and (we guess) western Amazonas will switch from UTC-4 to UTC-5
714    on 2013-11-10.  This affects America/Rio_Branco and America/Eirunepe.
715    (Thanks to Steffen Thorsen.)
716
717    Add entries for DST transitions in Morocco in the year 2038.
718    This avoids some year-2038 glitches introduced in 2013g.
719    (Thanks to Yoshito Umaoka for reporting the problem.)
720
721  Changes affecting API
722
723    The 'tzselect' command no longer requires the 'select' command,
724    and should now work with /bin/sh on more platforms.  It also works
725    around a bug in BusyBox awk before version 1.21.0.  (Thanks to
726    Patrick 'P. J.' McDermott and Alan Barrett.)
727
728  Changes affecting code
729
730    Fix localtime overflow bugs with 32-bit unsigned time_t.
731
732    zdump no longer assumes sscanf returns maximal values on overflow.
733
734  Changes affecting the build procedure
735
736    The builder can specify which programs to use, if any, instead of
737    'ar' and 'ranlib', and libtz.a is now built locally before being
738    installed.  (Thanks to Michael Forney.)
739
740    A dependency typo in the 'zdump' rule has been fixed.
741    (Thanks to Andrew Paprocki.)
742
743    The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f'
744    work as specified by POSIX.2-1992 or later; this is portable nowadays.
745
746    'make clean' no longer removes 'leapseconds', since it's
747    host-independent and is part of the distribution.
748
749    The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed.
750
751  Changes affecting documentation and commentary
752
753    tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol
754    (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle).
755
756    Update URLs in tz-link page.  Add URLs for Microsoft Windows, since
757    8.1 introduces tz support.  Remove URLs for Tru64 and UnixWare (no
758    longer maintained) and for old advisories.  SOFA now does C.
759
760Release 2013g - 2013-09-30 21:08:26 -0700
761
762  Changes affecting current and near-future time stamps
763
764    Morocco now observes DST from the last Sunday in March to the last
765    Sunday in October, not April to September respectively.  (Thanks
766    to Steffen Thorsen.)
767
768  Changes affecting 'zic'
769
770    'zic' now runs on platforms that lack both hard links and symlinks.
771    (Thanks to Theo Veenker for reporting the problem, for MinGW.)
772    Also, fix some bugs on platforms that lack hard links but have symlinks.
773
774    'zic -v' again warns that Asia/Tehran has no POSIX environment variable
775    to predict the far future, fixing a bug introduced in 2013e.
776
777  Changes affecting the build procedure
778
779    The 'leapseconds' file is again put into the tzdata tarball.
780    Also, 'leapseconds.awk', so tzdata is self-contained.  (Thanks to
781    Matt Burgess and Ian Abbott.)  The timestamps of these and other
782    dependent files in tarballs are adjusted more consistently.
783
784  Changes affecting documentation and commentary
785
786    The README file is now part of the data tarball as well as the code.
787    It now states that files are public domain unless otherwise specified.
788    (Thanks to Andrew Main (Zefram) for asking for clarifications.)
789    Its details about the 1989 release moved to a place of honor near
790    the end of NEWS.
791
792
793Release 2013f - 2013-09-24 23:37:36 -0700
794
795  Changes affecting near-future time stamps
796
797    Tocantins will very likely not observe DST starting this spring.
798    (Thanks to Steffen Thorsen.)
799
800    Jordan will likely stay at UTC+3 indefinitely, and will not fall
801    back this fall.
802
803    Palestine will fall back at 00:00, not 01:00.  (Thanks to Steffen Thorsen.)
804
805  Changes affecting API
806
807    The types of the global variables 'timezone' and 'altzone' (if present)
808    have been changed back to 'long'.  This is required for 'timezone'
809    by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
810    These variables were originally 'long' in the tz code, but were
811    mistakenly changed to 'time_t' in 1987; nobody reported the
812    incompatibility until now.  The difference matters on x32, where
813    'long' is 32 bits and 'time_t' is 64.  (Thanks to Elliott Hughes.)
814
815  Changes affecting the build procedure
816
817    Avoid long strings in leapseconds.awk to work around a mawk bug.
818    (Thanks to Cyril Baurand.)
819
820  Changes affecting documentation and commentary
821
822    New file 'NEWS' that contains release notes like this one.
823
824    Paraguay's law does not specify DST transition time; 00:00 is customary.
825    (Thanks to Waldemar Villamayor-Venialbo.)
826
827    Minor capitalization fixes.
828
829  Changes affecting version-control only
830
831    The experimental GitHub repository now contains annotated and
832    signed tags for recent releases, e.g., '2013e' for Release 2013e.
833    Releases are tagged starting with 2012e; earlier releases were
834    done differently, and tags would either not have a simple name or
835    not exactly match what was released.
836
837    'make set-timestamps' is now simpler and a bit more portable.
838
839
840Release 2013e - 2013-09-19 23:50:04 -0700
841
842  Changes affecting near-future time stamps
843
844    This year Fiji will start DST on October 27, not October 20.
845    (Thanks to David Wheeler for the heads-up.)  For now, guess that
846    Fiji will continue to spring forward the Sunday before the fourth
847    Monday in October.
848
849  Changes affecting current and future time zone abbreviations
850
851    Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian
852    time zone abbreviations since 1932.  (Thanks to George Ziegler,
853    Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and
854    Benny Lin.)  This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura,
855    Asia/Makassar, and Asia/Pontianak.
856
857    Use ART (UTC-3, standard time), rather than WARST (also UTC-3, but
858    daylight saving time) for San Luis, Argentina since 2009.
859
860  Changes affecting Godthåb time stamps after 2037 if version mismatch
861
862    Allow POSIX-like TZ strings where the transition time's hour can
863    range from -167 through 167, instead of the POSIX-required 0
864    through 24.  E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the
865    new Fiji rules.  This is a more-compact way to represent
866    far-future time stamps for America/Godthab, America/Santiago,
867    Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem,
868    Pacific/Easter, and Pacific/Fiji.  Other zones are unaffected by
869    this change.  (Derived from a suggestion by Arthur David Olson.)
870
871    Allow POSIX-like TZ strings where daylight saving time is in
872    effect all year.  E.g., TZ='WART4WARST,J1/0,J365/25' for Western
873    Argentina Summer Time all year.  This supports a more-compact way
874    to represent the 2013d data for America/Argentina/San_Luis.
875    Because of the change for San Luis noted above this change does not
876    affect the current data.  (Thanks to Andrew Main (Zefram) for
877    suggestions that improved this change.)
878
879    Where these two TZ changes take effect, there is a minor extension
880    to the tz file format in that it allows new values for the
881    embedded TZ-format string, and the tz file format version number
882    has therefore been increased from 2 to 3 as a precaution.
883    Version-2-based client code should continue to work as before for
884    all time stamps before 2038.  Existing version-2-based client code
885    (tzcode, GNU/Linux, Solaris) has been tested on version-3-format
886    files, and typically works in practice even for time stamps after
887    2037; the only known exception is America/Godthab.
888
889  Changes affecting time stamps before 1970
890
891    Pacific/Johnston is now a link to Pacific/Honolulu.  This corrects
892    some errors before 1947.
893
894    Some zones have been turned into links, when they differ from existing
895    zones only in older data entries that were likely invented or that
896    differ only in LMT or transitions from LMT.  These changes affect
897    only time stamps before 1943.  The affected zones are:
898    Africa/Juba, America/Anguilla, America/Aruba, America/Dominica,
899    America/Grenada, America/Guadeloupe, America/Marigot,
900    America/Montserrat, America/St_Barthelemy, America/St_Kitts,
901    America/St_Lucia, America/St_Thomas, America/St_Vincent,
902    America/Tortola, and Europe/Vaduz.  (Thanks to Alois Treindl for
903    confirming that the old Europe/Vaduz zone was wrong and the new
904    link is better for WWII-era times.)
905
906    Change Kingston Mean Time from -5:07:12 to -5:07:11.  This affects
907    America/Cayman, America/Jamaica and America/Grand_Turk time stamps
908    from 1890 to 1912.
909
910    Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
911    This affects Europe/Zurich time stamps from 1853 to 1894.  (Thanks
912    to Alois Treindl).
913
914    Change the date of the circa-1850 Zurich transition from 1849-09-12
915    to 1853-07-16, overriding Shanks with data from Messerli about
916    postal and telegraph time in Switzerland.
917
918  Changes affecting time zone abbreviations before 1970
919
920    For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932,
921    as Jakarta was called Batavia back then.
922
923  Changes affecting API
924
925    The 'zic' command now outputs a dummy transition when far-future
926    data can't be summarized using a TZ string, and uses a 402-year
927    window rather than a 400-year window.  For the current data, this
928    affects only the Asia/Tehran file.  It does not affect any of the
929    time stamps that this file represents, so zdump outputs the same
930    information as before.  (Thanks to Andrew Main (Zefram).)
931
932    The 'date' command has a new '-r' option, which lets you specify
933    the integer time to display, a la FreeBSD.
934
935    The 'tzselect' command has two new options '-c' and '-n', which lets you
936    select a zone based on latitude and longitude.
937
938    The 'zic' command's '-v' option now warns about constructs that
939    require the new version-3 binary file format.  (Thanks to Arthur
940    David Olson for the suggestion.)
941
942    Support for floating-point time_t has been removed.
943    It was always dicey, and POSIX no longer requires it.
944    (Thanks to Eric Blake for suggesting to the POSIX committee to
945    remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
946    Heninger, Arthur David Olson, and Alois Treindl, for reporting
947    bugs and elucidating some of the corners of the old floating-point
948    implementation.)
949
950    The signatures of 'offtime', 'timeoff', and 'gtime' have been
951    changed back to the old practice of using 'long' to represent UT
952    offsets.  This had been inadvertently and mistakenly changed to
953    'int_fast32_t'.  (Thanks to Christos Zoulas.)
954
955    The code avoids undefined behavior on integer overflow in some
956    more places, including gmtime, localtime, mktime and zdump.
957
958  Changes affecting the zdump utility
959
960    zdump now outputs "UT" when referring to Universal Time, not "UTC".
961    "UTC" does not make sense for time stamps that predate the introduction
962    of UTC, whereas "UT", a more-generic term, does.  (Thanks to Steve Allen
963    for clarifying UT vs UTC.)
964
965  Data changes affecting behavior of tzselect and similar programs
966
967    Country code BQ is now called the more-common name "Caribbean Netherlands"
968    rather than the more-official "Bonaire, St Eustatius & Saba".
969
970    Remove from zone.tab the names America/Montreal, America/Shiprock,
971    and Antarctica/South_Pole, as they are equivalent to existing
972    same-country-code zones for post-1970 time stamps.  The data entries for
973    these names are unchanged, so the names continue to work as before.
974
975  Changes affecting code internals
976
977    zic -c now runs way faster on 64-bit hosts when given large numbers.
978
979    zic now uses vfprintf to avoid allocating and freeing some memory.
980
981    tzselect now computes the list of continents from the data,
982    rather than have it hard-coded.
983
984    Minor changes pacify GCC 4.7.3 and GCC 4.8.1.
985
986  Changes affecting the build procedure
987
988    The 'leapseconds' file is now generated automatically from a
989    new file 'leap-seconds.list', which is a copy of
990    <ftp://time.nist.gov/pub/leap-seconds.list>.
991    A new source file 'leapseconds.awk' implements this.
992    The goal is simplification of the future maintenance of 'leapseconds'.
993
994    When building the 'posix' or 'right' subdirectories, if the
995    subdirectory would be a copy of the default subdirectory, it is
996    now made a symbolic link if that is supported.  This saves about
997    2 MB of file system space.
998
999    The links America/Shiprock and Antarctica/South_Pole have been
1000    moved to the 'backward' file.  This affects only nondefault builds
1001    that omit 'backward'.
1002
1003  Changes affecting version-control only
1004
1005    .gitignore now ignores 'date'.
1006
1007  Changes affecting documentation and commentary
1008
1009    Changes to the 'tzfile' man page
1010
1011      It now mentions that the binary file format may be extended in
1012      future versions by appending data.
1013
1014      It now refers to the 'zdump' and 'zic' man pages.
1015
1016    Changes to the 'zic' man page
1017
1018      It lists conditions that elicit a warning with '-v'.
1019
1020      It says that the behavior is unspecified when duplicate names
1021      are given, or if the source of one link is the target of another.
1022
1023      Its examples are updated to match the latest data.
1024
1025      The definition of white space has been clarified slightly.
1026      (Thanks to Michael Deckers.)
1027
1028    Changes to the 'Theory' file
1029
1030      There is a new section about the accuracy of the tz database,
1031      describing the many ways that errors can creep in, and
1032      explaining why so many of the pre-1970 time stamps are wrong or
1033      misleading (thanks to Steve Allen, Lester Caine, and Garrett
1034      Wollman for discussions that contributed to this).
1035
1036      The 'Theory' file describes LMT better (this follows a
1037      suggestion by Guy Harris).
1038
1039      It refers to the 2013 edition of POSIX rather than the 2004 edition.
1040
1041      It's mentioned that excluding 'backward' should not affect the
1042      other data, and it suggests at least one zone.tab name per
1043      inhabited country (thanks to Stephen Colebourne).
1044
1045      Some longstanding restrictions on names are documented, e.g.,
1046      'America/New_York' precludes 'America/New_York/Bronx'.
1047
1048      It gives more reasons for the 1970 cutoff.
1049
1050      It now mentions which time_t variants are supported, such as
1051      signed integer time_t.  (Thanks to Paul Goyette for reporting
1052      typos in an experimental version of this change.)
1053
1054      (Thanks to Philip Newton for correcting typos in these changes.)
1055
1056    Documentation and commentary is more careful to distinguish UT in
1057    general from UTC in particular.  (Thanks to Steve Allen.)
1058
1059    Add a better source for the Zurich 1894 transition.
1060    (Thanks to Pierre-Yves Berger.)
1061
1062    Update shapefile citations in tz-link.htm.  (Thanks to Guy Harris.)
1063
1064
1065Release 2013d - 2013-07-05 07:38:01 -0700
1066
1067  Changes affecting future time stamps:
1068
1069    Morocco's midsummer transitions this year are July 7 and August 10,
1070    not July 9 and August 8.  (Thanks to Andrew Paprocki.)
1071
1072    Israel now falls back on the last Sunday of October.
1073    (Thanks to Ephraim Silverberg.)
1074
1075  Changes affecting past time stamps:
1076
1077    Specify Jerusalem's location more precisely; this changes the pre-1880
1078    times by 2 s.
1079
1080  Changing affecting metadata only:
1081
1082    Fix typos in the entries for country codes BQ and SX.
1083
1084  Changes affecting code:
1085
1086    Rework the code to fix a bug with handling Australia/Macquarie on
1087    32-bit hosts (thanks to Arthur David Olson).
1088
1089    Port to platforms like NetBSD, where time_t can be wider than long.
1090
1091    Add support for testing time_t types other than the system's.
1092    Run 'make check_time_t_alternatives' to try this out.
1093    Currently, the tests fail for unsigned time_t;
1094    this should get fixed at some point.
1095
1096  Changes affecting documentation and commentary:
1097
1098    Deemphasize the significance of national borders.
1099
1100    Update the zdump man page.
1101
1102    Remove obsolete NOID comment (thanks to Denis Excoffier).
1103
1104    Update several URLs and comments in the web pages.
1105
1106    Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler).
1107
1108    Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka).
1109
1110
1111Release 2013c - 2013-04-19 16:17:40 -0700
1112
1113  Changes affecting current and future time stamps:
1114
1115    Palestine observed DST starting March 29, 2013.  (Thanks to
1116    Steffen Thorsen.)  From 2013 on, Gaza and Hebron both observe DST,
1117    with the predicted rules being the last Thursday in March at 24:00
1118    to the first Friday on or after September 21 at 01:00.
1119
1120    Assume that the recent change to Paraguay's DST rules is permanent,
1121    by moving the end of DST to the 4th Sunday in March every year.
1122    (Thanks to Carlos Raúl Perasso.)
1123
1124  Changes affecting past time stamps:
1125
1126    Fix some historical data for Palestine to agree with that of
1127    timeanddate.com, as follows:
1128
1129	  The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not
1130	  00:00 Apr 1.
1131
1132	  The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not
1133	  02:00.
1134
1135	  The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27.
1136
1137	  The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2.
1138
1139	  The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01.
1140
1141	  The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00.
1142
1143    Fix times of habitation for Macquarie to agree with the Tasmania
1144    Parks & Wildlife Service history, which indicates that permanent
1145    habitation was 1899-1919 and 1948 on.
1146
1147  Changing affecting metadata only:
1148
1149    Macquarie Island is politically part of Australia, not Antarctica.
1150    (Thanks to Tobias Conradi.)
1151
1152    Sort Macquarie more-consistently with other parts of Australia.
1153    (Thanks to Tim Parenti.)
1154
1155
1156Release 2013b - 2013-03-10 22:33:40 -0700
1157
1158  Changes affecting current and future time stamps:
1159
1160    Haiti uses US daylight-saving rules this year, and presumably future years.
1161    This changes time stamps starting today.  (Thanks to Steffen Thorsen.)
1162
1163    Paraguay will end DST on March 24 this year.
1164    (Thanks to Steffen Thorsen.)  For now, assume it's just this year.
1165
1166    Morocco does not observe DST during Ramadan;
1167    try to predict Ramadan in Morocco as best we can.
1168    (Thanks to Erik Homoet for the heads-up.)
1169
1170  Changes affecting commentary:
1171
1172    Update URLs in tz-link page.  Add URLs for webOS, BB10, iOS.
1173    Update URL for Solaris.  Mention Internet RFC 6557.
1174    Update Internet RFCs 2445->5545, 2822->5322.
1175    Switch from FTP to HTTP for Internet RFCs.
1176
1177
1178Release 2013a - 2013-02-27 09:20:35 -0800
1179
1180  Change affecting binary data format:
1181
1182    The zone offset at the end of version-2-format zone files is now
1183    allowed to be 24:00, as per POSIX.1-2008.  (Thanks to Arthur David Olson.)
1184
1185  Changes affecting current and future time stamps:
1186
1187    Chile's 2013 rules, and we guess rules for 2014 and later, will be
1188    the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC.
1189    (Thanks to Steffen Thorsen and Robert Elz.)
1190
1191    New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen.
1192    (Thanks to Tobias Conradi and Arthur David Olson.)
1193
1194  Many changes affect historical time stamps before 1940.
1195  These were deduced from: Milne J. Civil time. Geogr J. 1899
1196  Feb;13(2):173-94 <http://www.jstor.org/stable/1774359>.
1197
1198  Changes affecting the code:
1199
1200    Fix zic bug that mishandled Egypt's 2010 changes (this also affected
1201    the data).  (Thanks to Arthur David Olson.)
1202
1203    Fix localtime bug when time_t is unsigned and data files were generated
1204    by a signed time_t system.  (Thanks to Doug Bailey for reporting and
1205    to Arthur David Olson for fixing.)
1206
1207    Allow the email address for bug reports to be set by the packager.
1208    The default is tz@iana.org, as before.  (Thanks to Joseph S. Myers.)
1209
1210    Update HTML checking to be compatible with Ubuntu 12.10.
1211
1212    Check that files are a safe subset of ASCII.  At some point we may
1213    relax this requirement to a safe subset of UTF-8.  Without the
1214    check, some non-UTF-8 encodings were leaking into the distribution.
1215
1216  Commentary changes:
1217
1218    Restore a comment about copyright notices that was inadvertently deleted.
1219    (Thanks to Arthur David Olson.)
1220
1221    Improve the commentary about which districts observe what times
1222    in Russia.  (Thanks to Oscar van Vlijmen and Arthur David Olson).
1223
1224    Add web page links to tz.js.
1225
1226    Add "Run by the Monkeys" to tz-art.  (Thanks to Arthur David Olson.)
1227
1228
1229Release 2012j - 2012-11-12 18:34:49 -0800
1230
1231  Libya moved to CET this weekend, but with DST planned next year.
1232  (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.)
1233
1234  Signatures now have the extension .asc, not .sign, as that's more
1235  standard.  (Thanks to Phil Pennock.)
1236
1237  The output of 'zdump --version', and of 'zic --version', now
1238  uses a format that is more typical for --version.
1239  (Thanks to Joseph S. Myers.)
1240
1241  The output of 'tzselect --help', 'zdump --help', and 'zic --help'
1242  now uses tz@iana.org rather than the old elsie address.
1243
1244  zic -v now complains about abbreviations that are less than 3
1245  or more than 6 characters, as per Posix.  Formerly, it checked
1246  for abbreviations that were more than 3.
1247
1248  'make public' no longer puts its temporary directory under /tmp,
1249  and uses the just-built zic rather than the system zic.
1250
1251  Various fixes to documentation and commentary.
1252
1253
1254Release 2012i - 2012-11-03 12:57:09 -0700
1255
1256  Cuba switches from DST tomorrow at 01:00.  (Thanks to Steffen Thorsen.)
1257
1258  Linker flags can now be specified via LDFLAGS.
1259  AWK now defaults to 'awk', not 'nawk'.
1260  The shell in tzselect now defaults to /bin/bash, but this can
1261  be overridden by specifying KSHELL.
1262  The main web page now mentions the unofficial GitHub repository.
1263  (Thanks to Mike Frysinger.)
1264
1265  Tarball signatures can now be built by running 'make signatures'.
1266  There are also new makefile rules 'tarballs', 'check_public', and
1267  separate makefile rules for each tarball and signature file.
1268  A few makefile rules are now more portable to strict POSIX.
1269
1270  The main web page now lists the canonical IANA URL.
1271
1272
1273Release 2012h - 2012-10-26 22:49:10 -0700
1274
1275  Bahia no longer has DST.  (Thanks to Kelley Cook.)
1276
1277  Tocantins has DST.  (Thanks to Rodrigo Severo.)
1278
1279  Israel has new DST rules next year.  (Thanks to Ephraim Silverberg.)
1280
1281  Jordan stays on DST this winter.  (Thanks to Steffen Thorsen.)
1282
1283  Web page updates.
1284
1285  More C modernization, except that at Arthur David Olson's suggestion
1286  the instances of 'register' were kept.
1287
1288
1289Release 2012g - 2012-10-17 20:59:45 -0700
1290
1291  Samoa fall 2012 and later.  (Thanks to Nicholas Pereira and Robert Elz.)
1292
1293  Palestine fall 2012.  (Thanks to Steffen Thorsen.)
1294
1295  Assume C89.
1296
1297  To attack the version-number problem, this release ships the file
1298  'Makefile' (which contains the release number) in both the tzcode and
1299  the tzdata tarballs.  The two Makefiles are identical, and should be
1300  identical in any matching pair of tarballs, so it shouldn't matter
1301  which order you extract the tarballs.  Perhaps we can come up with a
1302  better version-number scheme at some point; this scheme does have the
1303  virtue of not adding more files.
1304
1305
1306Release 2012f - 2012-09-12 23:17:03 -0700
1307
1308  * australasia (Pacific/Fiji): Fiji DST is October 21 through January
1309    20 this year.  (Thanks to Steffen Thorsen.)
1310
1311
1312Release 2012e - 2012-08-02 20:44:55 -0700
1313
1314  * australasia (Pacific/Fakaofo): Tokelau is UTC+13, not UTC+14.
1315    (Thanks to Steffen Thorsen.)
1316
1317  * Use a single version number for both code and data.
1318
1319  * .gitignore: New file.
1320
1321  * Remove trailing white space.
1322
1323
1324Release code2012c-data2012d - 2012-07-19 16:35:33 -0700
1325
1326  Changes for Morocco's time stamps, which take effect in a couple of
1327  hours, along with infrastructure changes to accommodate how the tz
1328  code and data are released on IANA.
1329
1330
1331Release data2012c - 2012-03-27 12:17:25 -0400
1332
1333  africa
1334	Summer time changes for Morocco (to start late April 2012)
1335
1336  asia
1337	Changes for 2012 for Gaza & the West Bank (Hebron) and Syria
1338
1339  northamerica
1340	Haiti following US/Canada rules for 2012 (and we're assuming,
1341	for now anyway, for the future).
1342
1343
1344Release 2012b - 2012-03-02 12:29:15 +0700
1345
1346  There is just one change to tzcode2012b (compared with 2012a):
1347  the Makefile that was accidentally included with 2012a has been
1348  replaced with the version that should have been there, which is
1349  identical with the previous version (from tzcode2011i).
1350
1351  There are just two changes in tzdata2012b compared with 2012a.
1352
1353  Most significantly, summer time in Cuba has been delayed 3 weeks
1354  (now starts April 1 rather than March 11).   Since Mar 11 (the old start
1355  date, as listed in 2012a) is just a little over a week away, this
1356  change is urgent.
1357
1358  Less importantly, an excess tab in one of the changes in zone.tab
1359  in 2012a has been removed.
1360
1361
1362Release 2012a - 2012-03-01 18:28:10 +0700
1363
1364  The changes in tzcode2012a (compared to the previous version, 2011i)
1365  are entirely to the README and tz-art.htm and tz-link.htm files, if
1366  none of those concern you, you can ignore the code update.  The changes
1367  reflect the changed addresses for the mailing list and the code and
1368  data distribution points & methods (and a link to DateTime::TimeZone::Tzfile
1369  has been added to tz-link.htm).
1370
1371  In tzdata2012a (compared to the previous release, which was 2011n)
1372  the major changes are:
1373	Chile 2011/2012 and 2012/2013 summer time date adjustments.
1374	Falkland Islands onto permanent summer time (we're assuming for the
1375		foreseeable future, though 2012 is all we're fairly certain of.)
1376	Armenia has abolished Summer Time.
1377	Tokelau jumped the International Date Line back last December
1378		(just the same as their near neighbour, Samoa).
1379	America/Creston is a new zone for a small area of British Columbia
1380	There will be a leapsecond 2012-06-30 23:59:60 UTC.
1381
1382  Other minor changes are:
1383	Corrections to 1918 Canadian summer time end dates.
1384	Updated URL for UK time zone history (in comments)
1385	A few typos in Le Corre's list of free French place names (comments)
1386
1387
1388Release data2011n - 2011-10-30 14:57:54 +0700
1389
1390  There are three changes of note - most urgently, Cuba (America/Havana)
1391  has extended summer time by two weeks, now to end on Nov 13, rather than
1392  the (already past) Oct 30.   Second, the Pridnestrovian Moldavian Republic
1393  (Europe/Tiraspol) decided not to split from the rest of Moldova after
1394  all, and consequently that zone has been removed (again) and reinstated
1395  in the "backward" file as a link to Europe/Chisinau.   And third, the
1396  end date for Fiji's summer time this summer was moved forward from the
1397  earlier planned Feb 26, to Jan 22.
1398
1399  Apart from that, Moldova (MD) returns to a single entry in zone.tab
1400  (and the incorrect syntax that was in the 2011m version of that file
1401  is so fixed - it would have been fixed in a different way had this
1402  change not happened - that's the "missing" sccs version id).
1403
1404
1405Release data2011m - 2011-10-24 21:42:16 +0700
1406
1407  In particular, the typos in comments in the data (2011-11-17 should have
1408  been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that
1409  Tim Parenti noted) have been fixed, and the change for Ukraine has been
1410  made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to
1411  Tim Parenti, and also Denys Gavrysh)
1412
1413  In addition, I added Europe/Tiraspol to zone.tab.
1414
1415  This time, all the files have new version numbers...  (including the files
1416  otherwise unchanged in 2011m that were changed in 2011l but didn't get new
1417  version numbers there...)
1418
1419
1420Release data2011l - 2011-10-10 11:15:43 +0700
1421
1422  There are just 2 changes that cause different generated tzdata files from
1423  zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil
1424  is included, but commented out.  Compared with the diff I sent out last week,
1425  this version also includes attributions for the sources for the changes
1426  (in much the same format as ado used, but the html tags have not been
1427  checked, verified, or used in any way at all, so if there are errors there,
1428  please let me know.)
1429
1430
1431Release data2011k - 2011-09-20 17:54:03 -0400
1432
1433  [not summarized]
1434
1435
1436Release data2011j - 2011-09-12 09:22:49 -0400
1437
1438  (contemporary changes for Samoa; past changes for Kenya, Uganda, and
1439  Tanzania); there are also two spelling corrections to comments in
1440  the australasia file (with thanks to Christos Zoulas).
1441
1442
1443Release 2011i - 2011-08-29 05:56:32 -0400
1444
1445  [not summarized]
1446
1447
1448Release data2011h - 2011-06-15 18:41:48 -0400
1449
1450  Russia and Curaçao changes
1451
1452
1453Release 2011g - 2011-04-25 09:07:22 -0400
1454
1455  update the rules for Egypt to reflect its abandonment of DST this year
1456
1457
1458Release 2011f - 2011-04-06 17:14:53 -0400
1459
1460  [not summarized]
1461
1462
1463Release 2011e - 2011-03-31 16:04:38 -0400
1464
1465  Morocco, Chile, and tz-link changes
1466
1467
1468Release 2011d - 2011-03-14 09:18:01 -0400
1469
1470  changes that impact present-day time stamps in Cuba, Samoa, and Turkey
1471
1472
1473Release 2011c - 2011-03-07 09:30:09 -0500
1474
1475  These do affect current time stamps in Chile and Annette Island, Canada.
1476
1477
1478Release 2011b - 2011-02-07 08:44:50 -0500
1479
1480  [not summarized]
1481
1482
1483Release 2011a - 2011-01-24 10:30:16 -0500
1484
1485  [not summarized]
1486
1487
1488Release data2010o - 2010-11-01 09:18:23 -0400
1489
1490  change to the end of DST in Fiji in 2011
1491
1492
1493Release 2010n - 2010-10-25 08:19:17 -0400
1494
1495  [not summarized]
1496
1497
1498Release 2010m - 2010-09-27 09:24:48 -0400
1499
1500  Hong Kong, Vostok, and zic.c changes
1501
1502
1503Release 2010l - 2010-08-16 06:57:25 -0400
1504
1505  [not summarized]
1506
1507
1508Release 2010k - 2010-07-26 10:42:27 -0400
1509
1510  [not summarized]
1511
1512
1513Release 2010j - 2010-05-10 09:07:48 -0400
1514
1515  changes for Bahía de Banderas and for version naming
1516
1517
1518Release data2010i - 2010-04-16 18:50:45 -0400
1519
1520  the end of DST in Morocco on 2010-08-08
1521
1522
1523Release data2010h - 2010-04-05 09:58:56 -0400
1524
1525  [not summarized]
1526
1527
1528Release data2010g - 2010-03-24 11:14:53 -0400
1529
1530  [not summarized]
1531
1532
1533Release 2010f - 2010-03-22 09:45:46 -0400
1534
1535  [not summarized]
1536
1537
1538Release data2010e - 2010-03-08 14:24:27 -0500
1539
1540  corrects the Dhaka bug found by Danvin Ruangchan
1541
1542
1543Release data2010d - 2010-03-06 07:26:01 -0500
1544
1545  [not summarized]
1546
1547
1548Release 2010c - 2010-03-01 09:20:58 -0500
1549
1550  changes including KRE's suggestion for earlier initialization of
1551  "goahead" and "goback" structure elements
1552
1553
1554Release code2010a - 2010-02-16 10:40:04 -0500
1555
1556  [not summarized]
1557
1558
1559Release data2010b - 2010-01-20 12:37:01 -0500
1560
1561  Mexico changes
1562
1563
1564Release data2010a - 2010-01-18 08:30:04 -0500
1565
1566  changes to Dhaka
1567
1568
1569Release data2009u - 2009-12-26 08:32:28 -0500
1570
1571  changes to DST in Bangladesh
1572
1573
1574Release 2009t - 2009-12-21 13:24:27 -0500
1575
1576  [not summarized]
1577
1578
1579Release data2009s - 2009-11-14 10:26:32 -0500
1580
1581  (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change
1582
1583
1584Release 2009r - 2009-11-09 10:10:31 -0500
1585
1586  "antarctica" and "tz-link.htm" changes
1587
1588
1589Release 2009q - 2009-11-02 09:12:40 -0500
1590
1591  with two corrections as reported by Eric Muller and Philip Newton
1592
1593
1594Release data2009p - 2009-10-23 15:05:27 -0400
1595
1596  Argentina (including San Luis) changes (with the correction from
1597  Mariano Absatz)
1598
1599
1600Release data2009o - 2009-10-14 16:49:38 -0400
1601
1602  Samoa (commentary only), Pakistan, and Bangladesh changes
1603
1604
1605Release data2009n - 2009-09-22 15:13:38 -0400
1606
1607  added commentary for Argentina and a change to the end of DST in
1608  2009 in Pakistan
1609
1610
1611Release data2009m - 2009-09-03 10:23:43 -0400
1612
1613  Samoa and Palestine changes
1614
1615
1616Release data2009l - 2009-08-14 09:13:07 -0400
1617
1618  Samoa (comments only) and Egypt
1619
1620
1621Release 2009k - 2009-07-20 09:46:08 -0400
1622
1623  [not summarized]
1624
1625
1626Release data2009j - 2009-06-15 06:43:59 -0400
1627
1628  Bangladesh change (with a short turnaround since the DST change is
1629  impending)
1630
1631
1632Release 2009i - 2009-06-08 09:21:22 -0400
1633
1634  updating for DST in Bangladesh this year
1635
1636
1637Release 2009h - 2009-05-26 09:19:14 -0400
1638
1639  [not summarized]
1640
1641
1642Release data2009g - 2009-04-20 16:34:07 -0400
1643
1644  Cairo
1645
1646
1647Release data2009f - 2009-04-10 11:00:52 -0400
1648
1649  correct DST in Pakistan
1650
1651
1652Release 2009e - 2009-04-06 09:08:11 -0400
1653
1654  [not summarized]
1655
1656
1657Release 2009d - 2009-03-23 09:38:12 -0400
1658
1659  Morocco, Tunisia, Argentina, and American Astronomical Society changes
1660
1661
1662Release data2009c - 2009-03-16 09:47:51 -0400
1663
1664  change to the start of Cuban DST
1665
1666
1667Release 2009b - 2009-02-09 11:15:22 -0500
1668
1669  [not summarized]
1670
1671
1672Release 2009a - 2009-01-21 10:09:39 -0500
1673
1674  [not summarized]
1675
1676
1677Release data2008i - 2008-10-21 12:10:25 -0400
1678
1679  southamerica and zone.tab files, with Argentina DST rule changes and
1680  United States zone reordering and recommenting
1681
1682
1683Release 2008h - 2008-10-13 07:33:56 -0400
1684
1685  [not summarized]
1686
1687
1688Release 2008g - 2008-10-06 09:03:18 -0400
1689
1690  Fix a broken HTML anchor and update Brazil's DST transitions;
1691  there's also a slight reordering of information in tz-art.htm.
1692
1693
1694Release data2008f - 2008-09-09 22:33:26 -0400
1695
1696  [not summarized]
1697
1698
1699Release 2008e - 2008-07-28 14:11:17 -0400
1700
1701  changes by Arthur David Olson and Jesper Nørgaard Welen
1702
1703
1704Release data2008d - 2008-07-07 09:51:38 -0400
1705
1706  changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo
1707
1708
1709Release data2008c - 2008-05-19 17:48:03 -0400
1710
1711  Pakistan, Morocco, and Mongolia
1712
1713
1714Release data2008b - 2008-03-24 08:30:59 -0400
1715
1716  including renaming Asia/Calcutta to Asia/Kolkata, with a backward
1717  link provided
1718
1719
1720Release 2008a - 2008-03-08 05:42:16 -0500
1721
1722  [not summarized]
1723
1724
1725Release 2007k - 2007-12-31 10:25:22 -0500
1726
1727  most importantly, changes to the "southamerica" file based on
1728  Argentina's readoption of daylight saving time
1729
1730
1731Release 2007j - 2007-12-03 09:51:01 -0500
1732
1733  1. eliminate the "P" (parameter) macro;
1734
1735  2. the "noncontroversial" changes circulated on the time zone
1736  mailing list (less the changes to "logwtmp.c");
1737
1738  3. eliminate "too many transition" errors when "min" is used in time
1739  zone rules;
1740
1741  4. changes by Paul Eggert (including updated information for Venezuela).
1742
1743
1744Release data2007i - 2007-10-30 10:28:11 -0400
1745
1746  changes for Cuba and Syria
1747
1748
1749Release 2007h - 2007-10-01 10:05:51 -0400
1750
1751  changes by Paul Eggert, as well as an updated link to the ICU
1752  project in tz-link.htm
1753
1754
1755Release 2007g - 2007-08-20 10:47:59 -0400
1756
1757  changes by Paul Eggert
1758
1759  The "leapseconds" file has been updated to incorporate the most
1760  recent International Earth Rotation and Reference Systems Service
1761  (IERS) bulletin.
1762
1763  There's an addition to tz-art.htm regarding the television show "Medium".
1764
1765
1766Release 2007f - 2007-05-07 10:46:46 -0400
1767
1768  changes by Paul Eggert (including Haiti, Turks and Caicos, and New
1769  Zealand)
1770
1771  changes to zic.c to allow hour values greater than 24 (along with
1772  Paul's improved time value overflow checking)
1773
1774
1775Release 2007e - 2007-04-02 10:11:52 -0400
1776
1777  Syria and Honduras changes by Paul Eggert
1778
1779  zic.c variable renaming changes by Arthur David Olson
1780
1781
1782Release 2007d - 2007-03-20 08:48:30 -0400
1783
1784  changes by Paul Eggert
1785
1786  the elimination of white space at the ends of lines
1787
1788
1789Release 2007c - 2007-02-26 09:09:37 -0500
1790
1791  changes by Paul Eggert
1792
1793
1794Release 2007b - 2007-02-12 09:34:20 -0500
1795
1796  Paul Eggert's proposed change to the quotation handling logic in zic.c.
1797
1798  changes to the commentary in "leapseconds" reflecting the IERS
1799  announcement that there is to be no positive leap second at the end
1800  of June 2007.
1801
1802
1803Release 2007a - 2007-01-08 12:28:29 -0500
1804
1805  changes by Paul Eggert
1806
1807  Derick Rethan's Asmara change
1808
1809  Oscar van Vlijmen's Easter Island local mean time change
1810
1811  symbolic link changes
1812
1813
1814Release 2006p - 2006-11-27 08:54:27 -0500
1815
1816  changes by Paul Eggert
1817
1818
1819Release 2006o - 2006-11-06 09:18:07 -0500
1820
1821  changes by Paul Eggert
1822
1823
1824Release 2006n - 2006-10-10 11:32:06 -0400
1825
1826  changes by Paul Eggert
1827
1828
1829Release 2006m - 2006-10-02 15:32:35 -0400
1830
1831  changes for Uruguay, Palestine, and Egypt by Paul Eggert
1832
1833  (minimalist) changes to zic.8 to clarify "until" information
1834
1835
1836Release data2006l - 2006-09-18 12:58:11 -0400
1837
1838  Paul's best-effort work on this coming weekend's Egypt time change
1839
1840
1841Release 2006k - 2006-08-28 12:19:09 -0400
1842
1843  changes by Paul Eggert
1844
1845
1846Release 2006j - 2006-08-21 09:56:32 -0400
1847
1848  changes by Paul Eggert
1849
1850
1851Release code2006i - 2006-08-07 12:30:55 -0400
1852
1853  localtime.c fixes
1854
1855  Ken Pizzini's conversion script
1856
1857
1858Release code2006h - 2006-07-24 09:19:37 -0400
1859
1860  adds public domain notices to four files
1861
1862  includes a fix for transition times being off by a second
1863
1864  adds a new recording to the "arts" file (information courtesy Colin Bowern)
1865
1866
1867Release 2006g - 2006-05-08 17:18:09 -0400
1868
1869  northamerica changes by Paul Eggert
1870
1871
1872Release 2006f - 2006-05-01 11:46:00 -0400
1873
1874  a missing version number problem is fixed (with thanks to Bradley
1875  White for catching the problem)
1876
1877
1878Release 2006d - 2006-04-17 14:33:43 -0400
1879
1880  changes by Paul Eggert
1881
1882  added new items to tz-arts.htm that were found by Paul
1883
1884
1885Release 2006c - 2006-04-03 10:09:32 -0400
1886
1887  two sets of data changes by Paul Eggert
1888
1889  a fencepost error fix in zic.c
1890
1891  changes to zic.c and the "europe" file to minimize differences
1892  between output produced by the old 32-bit zic and the new 64-bit
1893  version
1894
1895
1896Release 2006b - 2006-02-20 10:08:18 -0500
1897  [tz32code2006b + tz64code2006b + tzdata2006b]
1898
1899  64-bit code
1900
1901  All SCCS IDs were bumped to "8.1" for this release.
1902
1903
1904Release 2006a - 2006-01-30 08:59:31 -0500
1905
1906  changes by Paul Eggert (in particular, Indiana time zone moves)
1907
1908  an addition to the zic manual page to describe how special-case
1909  transitions are handled
1910
1911
1912Release 2005r - 2005-12-27 09:27:13 -0500
1913
1914  Canadian changes by Paul Eggert
1915
1916  They also add "<pre>" directives to time zone data files and reflect
1917  changes to warning message logic in "zdump.c" (but with calls to
1918  "gettext" kept unbundled at the suggestion of Ken Pizzini).
1919
1920
1921Release 2005q - 2005-12-13 09:17:09 -0500
1922
1923  Nothing earth-shaking here:
1924	1.  Electronic mail addresses have been removed.
1925	2.  Casts of the return value of exit have been removed.
1926	3.  Casts of the argument of is.* macros have been added.
1927	4.  Indentation in one section of zic.c has been fixed.
1928	5.  References to dead URLs in the data files have been dealt with.
1929
1930
1931Release 2005p - 2005-12-05 10:30:53 -0500
1932
1933  "systemv", "tz-link.htm", and "zdump.c" changes
1934  (less the casts of arguments to the is* macros)
1935
1936
1937Release 2005o - 2005-11-28 10:55:26 -0500
1938
1939  Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert
1940
1941  zdump.c lint fixes by Arthur David Olson
1942
1943
1944Release 2005n - 2005-10-03 09:44:09 -0400
1945
1946  changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan
1947  et al. changes)
1948
1949
1950Release 2005m - 2005-08-29 12:15:40 -0400
1951
1952  changes by Paul Eggert (with a small tweak to the tz-art change)
1953
1954  a declaration of an unused variable has been removed from zdump.c
1955
1956
1957Release 2005l - 2005-08-22 12:06:39 -0400
1958
1959  changes by Paul Eggert
1960
1961  overflow/underflow checks by Arthur David Olson, minus changes to
1962  the "Theory" file about the pending addition of 64-bit data (I grow
1963  less confident of the changes being accepted with each passing day,
1964  and the changes no longer increase the data files nine-fold--there's
1965  less than a doubling in size by my local Sun's reckoning)
1966
1967
1968Release 2005k - 2005-07-14 14:14:24 -0400
1969
1970  The "leapseconds" file has been edited to reflect the recently
1971  announced leap second at the end of 2005.
1972
1973  I've also deleted electronic mail addresses from the files as an
1974  anti-spam measure.
1975
1976
1977Release 2005j - 2005-06-13 14:34:13 -0400
1978
1979  These reflect changes to limit the length of time zone abbreviations
1980  and the characters used in those abbreviations.
1981
1982  There are also changes to handle POSIX-style "quoted" time zone
1983  environment variables.
1984
1985  The changes were circulated on the time zone mailing list; the only
1986  change since then was the removal of a couple of minimum-length of
1987  abbreviation checks.
1988
1989
1990Release data2005i - 2005-04-21 15:04:16 -0400
1991
1992  changes (most importantly to Nicaragua and Haiti) by Paul Eggert
1993
1994
1995Release 2005h - 2005-04-04 11:24:47 -0400
1996
1997  changes by Paul Eggert
1998
1999  minor changes to Makefile and zdump.c to produce more useful output
2000  when doing a "make typecheck"
2001
2002
2003Release 2005g - 2005-03-14 10:11:21 -0500
2004
2005  changes by Paul Eggert (a change to current DST rules in Uruguay and
2006  an update to a link to time zone software)
2007
2008
2009Release 2005f - 2005-03-01 08:45:32 -0500
2010
2011  data and documentation changes by Paul Eggert
2012
2013
2014Release 2005e - 2005-02-10 15:59:44 -0500
2015
2016  [not summarized]
2017
2018
2019Release code2005d - 2005-01-31 09:21:47 -0500
2020
2021  make zic complain about links to links if the -v flag is used
2022
2023  have "make public" do more code checking
2024
2025  add an include to "localtime.c" for the benefit of gcc systems
2026
2027
2028Release 2005c - 2005-01-17 18:36:29 -0500
2029
2030  get better results when mktime runs on a system where time_t is double
2031
2032  changes to the data files (most importantly to Paraguay)
2033
2034
2035Release 2005b - 2005-01-10 09:19:54 -0500
2036
2037  Get localtime and gmtime working on systems with exotic time_t types.
2038
2039  Update the leap second commentary in the "leapseconds" file.
2040
2041
2042Release 2005a - 2005-01-01 13:13:44 -0500
2043
2044  [not summarized]
2045
2046
2047Release code2004i - 2004-12-14 13:42:58 -0500
2048
2049  Deal with systems where time_t is unsigned.
2050
2051
2052Release code2004h - 2004-12-07 11:40:18 -0500
2053
2054  64-bit-time_t changes
2055
2056
2057Release 2004g - 2004-11-02 09:06:01 -0500
2058
2059  update to Cuba (taking effect this weekend)
2060
2061  other changes by Paul Eggert
2062
2063  correction of the spelling of Oslo
2064
2065  changed versions of difftime.c and private.h
2066
2067
2068Release code2004f - 2004-10-21 10:25:22 -0400
2069
2070  Cope with wide-ranging tm_year values.
2071
2072
2073Release 2004e - 2004-10-11 14:47:21 -0400
2074
2075  Brazil/Argentina/Israel changes by Paul Eggert
2076
2077  changes to tz-link.htm by Paul
2078
2079  one small fix to Makefile
2080
2081
2082Release 2004d - 2004-09-22 08:27:29 -0400
2083
2084  Avoid overflow problems when TM_YEAR_BASE is added to an integer.
2085
2086
2087Release 2004c - 2004-08-11 12:06:26 -0400
2088
2089  asctime-related changes
2090
2091  (variants of) some of the documentation changes suggested by Paul Eggert
2092
2093
2094Release 2004b - 2004-07-19 14:33:35 -0400
2095
2096  data changes by Paul Eggert - most importantly, updates for Argentina
2097
2098
2099Release 2004a - 2004-05-27 12:00:47 -0400
2100
2101  changes by Paul Eggert
2102
2103  Handle DST transitions that occur at the end of a month in some
2104  years but at the start of the following month in other years.
2105
2106  Add a copy of the correspondence that's the basis for claims about
2107  DST in the Navajo Nation.
2108
2109
2110Release 2003e - 2003-12-15 09:36:47 -0500
2111
2112  changes by Arthur David Olson (primarily code changes)
2113
2114  changes by Paul Eggert (primarily data changes)
2115
2116  minor changes to "Makefile" and "northamerica" (in the latter case,
2117  optimization of the "Toronto" rules)
2118
2119
2120Release 2003d - 2003-10-06 09:34:44 -0400
2121
2122  changes by Paul Eggert
2123
2124
2125Release 2003c - 2003-09-16 10:47:05 -0400
2126
2127  Fix bad returns in zic.c's inleap function.
2128  Thanks to Bradley White for catching the problem!
2129
2130
2131Release 2003b - 2003-09-16 07:13:44 -0400
2132
2133  Add a "--version" option (and documentation) to the zic and zdump commands.
2134
2135  changes to overflow/underflow checking in zic
2136
2137  a localtime typo fix.
2138
2139  Update the leapseconds and tz-art.htm files.
2140
2141
2142Release 2003a - 2003-03-24 09:30:54 -0500
2143
2144  changes by Paul Eggert
2145
2146  a few additions and modifications to the tz-art.htm file
2147
2148
2149Release 2002d - 2002-10-15 13:12:42 -0400
2150
2151  changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab
2152
2153  There's also a new time zone quote in "tz-art.htm".
2154
2155
2156Release 2002c - 2002-04-04 11:55:20 -0500
2157
2158  changes by Paul Eggert
2159
2160  Change zic.c to avoid creating symlinks to files that don't exist.
2161
2162
2163Release 2002b - 2002-01-28 12:56:03 -0500
2164
2165  [These change notes are for Release 2002a, which was corrupted.
2166  2002b was a corrected version of 2002a.]
2167
2168  changes by Paul Eggert
2169
2170  Update the "leapseconds" file to note that there'll be no leap
2171  second at the end of June, 2002.
2172
2173  Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone.
2174
2175  Change to "difftime.c" to avoid sizeof problems.
2176
2177
2178Release 2001d - 2001-10-09 13:31:32 -0400
2179
2180  changes by Paul Eggert
2181
2182
2183Release 2001c - 2001-06-05 13:59:55 -0400
2184
2185  changes by Paul Eggert and Andrew Brown
2186
2187
2188Release 2001b - 2001-04-05 16:44:38 -0400
2189
2190  changes by Paul Eggert (modulo jnorgard's typo fix)
2191
2192  tz-art.htm has been HTMLified.
2193
2194
2195Release 2001a - 2001-03-13 12:57:44 -0500
2196
2197  changes by Paul Eggert
2198
2199  An addition to the "leapseconds" file: comments with the text of the
2200  latest IERS leap second notice.
2201
2202  Trailing white space has been removed from data file lines, and
2203  repeated spaces in "Rule Jordan" lines in the "asia" file have been
2204  converted to tabs.
2205
2206
2207Release 2000h - 2000-12-14 15:33:38 -0500
2208
2209  changes by Paul Eggert
2210
2211  one typo fix in the "art" file
2212
2213  With providence, this is the last update of the millennium.
2214
2215
2216Release 2000g - 2000-10-10 11:35:22 -0400
2217
2218  changes by Paul Eggert
2219
2220  correction of John Mackin's name submitted by Robert Elz
2221
2222  Garry Shandling's Daylight Saving Time joke (!?!) from the recent
2223  Emmy Awards broadcast.
2224
2225
2226Release 2000f - 2000-08-10 09:31:58 -0400
2227
2228  changes by Paul Eggert
2229
2230  Added information in "tz-art.htm" on a Seinfeld reference to DST.
2231
2232  Error checking and messages in the "yearistype" script have been
2233  improved.
2234
2235
2236Release 2000e - 2000-07-31 09:27:54 -0400
2237
2238  data changes by Paul Eggert
2239
2240  a change to the default value of the defined constant HAVE_STRERROR
2241
2242  the addition of a Dave Barry quote on DST to the tz-arts file
2243
2244
2245Release 2000d - 2000-04-20 15:43:04 -0400
2246
2247  changes to the documentation and code of strftime for C99 conformance
2248
2249  a bug fix for date.c
2250
2251  These are based on (though modified from) changes by Paul Eggert.
2252
2253
2254Release 2000c - 2000-03-04 10:31:43 -0500
2255
2256  changes by Paul Eggert
2257
2258
2259Release 2000b - 2000-02-21 12:16:29 -0500
2260
2261  changes by Paul Eggert and Joseph Myers
2262
2263  modest tweaks to the tz-art.htm and tz-link.htm files
2264
2265
2266Release 2000a - 2000-01-18 09:21:26 -0500
2267
2268  changes by Paul Eggert
2269
2270  The two hypertext documents have also been renamed.
2271
2272
2273Release code1999i-data1999j - 1999-11-15 18:43:22 -0500
2274
2275  Paul Eggert's changes
2276
2277  additions to the "zic" manual page and the "Arts.htm" file
2278
2279
2280Release code1999h-data1999i - 1999-11-08 14:55:21 -0500
2281
2282  [not summarized]
2283
2284
2285Release data1999h - 1999-10-07 03:50:29 -0400
2286
2287  changes by Paul Eggert to "europe" (most importantly, fixing
2288  Lithuania and Estonia)
2289
2290
2291Release 1999g - 1999-09-28 11:06:18 -0400
2292
2293  data changes by Paul Eggert (most importantly, the change for
2294  Lebanon that buys correctness for this coming Sunday)
2295
2296  The "code" file contains changes to "Makefile" and "checktab.awk" to
2297  allow better checking of time zone files before they are published.
2298
2299
2300Release 1999f - 1999-09-23 09:48:14 -0400
2301
2302  changes by Arthur David Olson and Paul Eggert
2303
2304
2305Release 1999e - 1999-08-17 15:20:54 -0400
2306
2307  changes circulated by Paul Eggert, although the change to handling
2308  of DST-specifying time zone names has been commented out for now
2309  (search for "XXX" in "localtime.c" for details).  These files also
2310  do not make any changes to the start of DST in Brazil.
2311
2312  In addition to Paul's changes, there are updates to "Arts.htm" and
2313  cleanups of URLs.
2314
2315
2316Release 1999d - 1999-03-30 11:31:07 -0500
2317
2318  changes by Paul Eggert
2319
2320  The Makefile's "make public" rule has also been changed to do a test
2321  compile of each individual time zone data file (which should help
2322  avoid problems such as the one we had with Nicosia).
2323
2324
2325Release 1999c - 1999-03-25 09:47:47 -0500
2326
2327  changes by Paul Eggert, most importantly the change for Chile.
2328
2329
2330Release 1999b - 1999-02-01 17:51:44 -0500
2331
2332  changes by Paul Eggert
2333
2334  code changes (suggested by Mani Varadarajan, mani at be.com) for
2335  correct handling of symbolic links when building using a relative directory
2336
2337  code changes to generate correct messages for failed links
2338
2339  updates to the URLs in Arts.htm
2340
2341
2342Release 1999a - 1999-01-19 16:20:29 -0500
2343
2344  error message internationalizations and corrections in zic.c and
2345  zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz,
2346  to whom thanks!)
2347
2348
2349Release code1998h-data1998i - 1998-10-01 09:56:10 -0400
2350
2351  changes for Brazil, Chile, and Germany
2352
2353  support for use of "24:00" in the input files for the time zone compiler
2354
2355
2356Release code1998g-data1998h - 1998-09-24 10:50:28 -0400
2357
2358  changes by Paul Eggert
2359
2360  correction to a define in the "private.h" file
2361
2362
2363Release data1998g - 1998-08-11 03:28:35 -0000
2364  [tzdata1998g.tar.gz is missing!]
2365
2366  Lithuanian change provided by mgedmin at pub.osf.it
2367
2368  Move creation of the GMT link with Etc/GMT to "etcetera" (from
2369  "backward") to ensure that the GMT file is created even where folks
2370  don't want the "backward" links (as suggested by Paul Eggert).
2371
2372
2373Release data1998f - 1998-07-20 13:50:00 -0000
2374  [tzdata1998f.tar.gz is missing!]
2375
2376  Update the "leapseconds" file to include the newly-announced
2377  insertion at the end of 1998.
2378
2379
2380Release code1998f - 1998-06-01 10:18:31 -0400
2381
2382  addition to localtime.c by Guy Harris
2383
2384
2385Release 1998e - 1998-05-28 09:56:26 -0400
2386
2387  The Makefile is changed to produce zoneinfo-posix rather than
2388  zoneinfo/posix, and to produce zoneinfo-leaps rather than
2389  zoneinfo/right.
2390
2391  data changes by Paul Eggert
2392
2393  changes from Guy Harris to provide asctime_r and ctime_r
2394
2395  A usno1998 file (substantially identical to usno1997) has been added.
2396
2397
2398Release 1998d - 1998-05-14 11:58:34 -0400
2399
2400  changes to comments (in particular, elimination of references to CIA maps).
2401  "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places
2402  where changes occur.
2403
2404
2405Release 1998c - 1998-02-28 12:32:26 -0500
2406
2407  changes by Paul Eggert (save the "French correction," on which I'll
2408  wait for the dust to settle)
2409
2410  symlink changes
2411
2412  changes and additions to Arts.htm
2413
2414
2415Release 1998b - 1998-01-17 14:31:51 -0500
2416
2417  URL cleanups and additions
2418
2419
2420Release 1998a - 1998-01-13 12:37:35 -0500
2421
2422  changes by Paul Eggert
2423
2424
2425Release code1997i-data1997k - 1997-12-29 09:53:41 -0500
2426
2427  changes by Paul Eggert, with minor modifications from Arthur David
2428  Olson to make the files more browser friendly
2429
2430
2431Release code1997h-data1997j - 1997-12-18 17:47:35 -0500
2432
2433  minor changes to put "TZif" at the start of each time zone information file
2434
2435  a rule has also been added to the Makefile so you can
2436	make zones
2437  to just recompile the zone information files (rather than doing a
2438  full "make install" with its other effects).
2439
2440
2441Release data1997i - 1997-10-07 08:45:38 -0400
2442
2443  changes to Africa by Paul Eggert
2444
2445
2446Release code1997g-data1997h - 1997-09-04 16:56:54 -0400
2447
2448  corrections for Uruguay (and other locations)
2449
2450  Arthur David Olson's simple-minded fix allowing mktime to both
2451  correctly handle leap seconds and correctly handle tm_sec values
2452  upon which arithmetic has been performed.
2453
2454
2455Release code1997f-data1997g - 1997-07-19 13:15:02 -0400
2456
2457  Paul Eggert's updates
2458
2459  a small change to a function prototype;
2460
2461  "Music" has been renamed "Arts.htm", HTMLified, and augmented to
2462  include information on Around the World in Eighty Days.
2463
2464
2465Release code1997e-data1997f - 1997-05-03 18:52:34 -0400
2466
2467  fixes to zic's error handling
2468
2469  changes inspired by the item circulated on Slovenia
2470
2471  The description of Web resources has been HTMLified for browsing
2472  convenience.
2473
2474  A new piece of tz-related music has been added to the "Music" file.
2475
2476
2477Release code1997d-data1997e - 1997-03-29 12:48:52 -0500
2478
2479  Paul Eggert's latest suggestions
2480
2481
2482Release code1997c-data1997d - 1997-03-07 20:37:54 -0500
2483
2484  changes to "zic.c" to correct performance of the "-s" option
2485
2486  a new file "usno1997"
2487
2488
2489Release data1997c - 1997-03-04 09:58:18 -0500
2490
2491  changes in Israel
2492
2493
2494Release 1997b - 1997-02-27 18:34:19 -0500
2495
2496  The data file incorporates the 1997 leap second.
2497
2498  The code file incorporates Arthur David Olson's take on the
2499  zic/multiprocessor/directory-creation situation.
2500
2501
2502Release 1997a - 1997-01-21 09:11:10 -0500
2503
2504  Paul Eggert's Antarctica (and other changes)
2505
2506  Arthur David Olson finessed the "getopt" issue by checking against
2507  both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1
2508  is returned while SunOS 5.5's manual says EOF is returned).
2509
2510
2511Release code1996o-data1996n - 1996-12-27 21:42:05 -0500
2512
2513  Paul Eggert's latest changes
2514
2515
2516Release code1996n - 1996-12-16 09:42:02 -0500
2517
2518  link snapping fix from Bruce Evans (via Garrett Wollman)
2519
2520
2521Release data1996m - 1996-11-24 02:37:34 -0000
2522  [tzdata1996m.tar.gz is missing!]
2523
2524  Paul Eggert's batch of changes
2525
2526
2527Release code1996m-data1996l - 1996-11-05 14:00:12 -0500
2528
2529  No functional changes here; the files have simply been changed to
2530  make more use of ISO style dates in comments. The names of the above
2531  files now include the year in full.
2532
2533
2534Release code96l - 1996-09-08 17:12:20 -0400
2535
2536  tzcode96k was missing a couple of pieces.
2537
2538
2539Release 96k - 1996-09-08 16:06:22 -0400
2540
2541  the latest round of changes from Paul Eggert
2542
2543  the recent Year 2000 material
2544
2545
2546Release code96j - 1996-07-30 13:18:53 -0400
2547
2548  Set sp->typecnt as suggested by Timothy Patrick Murphy.
2549
2550
2551Release code96i - 1996-07-27 20:11:35 -0400
2552
2553  Paul's suggested patch for strftime %V week numbers
2554
2555
2556Release data96i - 1996-07-01 18:13:04 -0400
2557
2558  "northamerica" and "europe" changes by Paul Eggert
2559
2560
2561Release code96h - 1996-06-05 08:02:21 -0400
2562
2563  fix for handling transitions specified in Universal Time
2564
2565  Some "public domain" notices have also been added.
2566
2567
2568Release code96g - 1996-05-16 14:00:26 -0400
2569
2570  fix for the simultaneous-DST-and-zone-change challenge
2571
2572
2573Release data96h - 1996-05-09 17:40:51 -0400
2574
2575  changes by Paul Eggert
2576
2577
2578Release code96f-data96g - 1996-05-03 03:09:59 -0000
2579  [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!]
2580
2581  The changes get us some of the way to fixing the problems noted in Paul
2582  Eggert's letter yesterday (in addition to a few others).  The approach
2583  has been to make zic a bit smarter about figuring out what time zone
2584  abbreviations apply just after the time specified in the "UNTIL" part
2585  of a zone line.  Putting the smarts in zic means avoiding having
2586  transition times show up in both "Zone" lines and "Rule" lines, which
2587  in turn avoids multiple transition time entries in time zone files.
2588  (This also makes the zic input files such as "europe" a bit shorter and
2589  should ease maintenance.)
2590
2591
2592Release data96f - 1996-04-19 19:20:03 -0000
2593  [tzdata96f.tar.gz is missing!]
2594
2595  The only changes are to the "northamerica" file; the time zone
2596  abbreviation for Denver is corrected to MST (and MDT), and the
2597  comments for Mexico have been updated.
2598
2599
2600Release data96e - 1996-03-19 17:37:26 -0500
2601
2602  Proposals by Paul Eggert, in particular the Portugal change that
2603  comes into play at the end of this month.
2604
2605
2606Release data96d - 1996-03-18 20:49:39 -0500
2607
2608  [not summarized]
2609
2610
2611Release code96e - 1996-02-29 15:43:27 -0000
2612  [tzcode96e.tar.gz is missing!]
2613
2614  internationalization changes and the fix to the documentation for strftime
2615
2616
2617Release code96d-data96c - 1996-02-12 11:05:27 -0500
2618
2619  The "code" file simply updates Bob Kridle's electronic address.
2620
2621  The "data" file updates rules for Mexico.
2622
2623
2624Release data96b - 1996-01-27 15:44:42 -0500
2625
2626  Kiribati change
2627
2628
2629Release code96c - 1996-01-16 16:58:15 -0500
2630
2631  leap-year streamlining and binary-search changes
2632
2633  fix to newctime.3
2634
2635
2636Release code96b - 1996-01-10 20:42:39 -0500
2637
2638  fixes and enhancements from Paul Eggert, including code that
2639  emulates the behavior of recent versions of the SunOS "date"
2640  command.
2641
2642
2643Release 96a - 1996-01-06 09:08:24 -0500
2644
2645  Israel updates
2646
2647  fixes to strftime.c for correct ISO 8601 week number generation,
2648  plus support for two new formats ('G' and 'g') to give ISO 8601 year
2649  numbers (which are not necessarily the same as calendar year numbers)
2650
2651
2652Release code95i-data95m - 1995-12-21 12:46:47 -0500
2653
2654  The latest revisions from Paul Eggert are included, the usno1995
2655  file has been updated, and a new file ("WWW") covering useful URLs
2656  has been added.
2657
2658
2659Release code95h-data95l - 1995-12-19 18:10:12 -0500
2660
2661  A simplification of a macro definition, a change to data for Sudan,
2662  and (for last minute shoppers) notes in the "Music" file on the CD
2663  "Old Man Time".
2664
2665
2666Release code95g-data95k - 1995-10-30 10:32:47 -0500
2667
2668  (slightly reformatted) 8-bit-clean proposed patch
2669
2670  minor patch: US/Eastern -> America/New_York
2671
2672  snapshot of the USNO's latest data ("usno1995")
2673
2674  some other minor cleanups
2675
2676
2677Release code95f-data95j - 1995-10-28 21:01:34 -0000
2678  [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!]
2679
2680  European cleanups
2681
2682  support for 64-bit time_t's
2683
2684  optimization in localtime.c
2685
2686
2687Release code95e - 1995-10-13 13:23:57 -0400
2688
2689  the mktime change to scan from future to past when trying to find time zone
2690  offsets
2691
2692
2693Release data95i - 1995-09-26 10:43:26 -0400
2694
2695  For Canada/Central, guess that the Sun customer's "one week too
2696  early" was just a approximation, and the true error is one month
2697  too early.  This is consistent with the rest of Canada.
2698
2699
2700Release data95h - 1995-09-21 11:26:48 -0400
2701
2702  latest changes from Paul Eggert
2703
2704
2705Release code95d - 1995-09-14 11:14:45 -0400
2706
2707  the addition of a "Music" file, which documents four recorded
2708  versions of the tune "Save That Time".
2709
2710
2711Release data95g - 1995-09-01 17:21:36 -0400
2712
2713  "yearistype" correction
2714
2715
2716Release data95f - 1995-08-28 20:46:56 -0400
2717
2718  Paul Eggert's change to the australasia file
2719
2720
2721Release data95e - 1995-07-08 18:02:34 -0400
2722
2723  The only change is a leap second at the end of this year.
2724  Thanks to Bradley White for forwarding news on the leap second.
2725
2726
2727Release data95d - 1995-07-03 13:26:22 -0400
2728
2729  Paul Eggert's changes
2730
2731
2732Release data95c - 1995-07-02 19:19:28 -0400
2733
2734  changes to "asia", "backward", "europe", and "southamerica"
2735  (read: northamericacentrics need not apply)
2736
2737
2738Release code95c - 1995-03-13 14:00:46 -0500
2739
2740  one-line fix for sign extension problems in detzcode
2741
2742
2743Release 95b - 1995-03-04 11:22:38 -0500
2744
2745  Minor changes in both:
2746
2747  The "code" file contains a workaround for the lack of "unistd.h" in
2748  Microsoft C++ version 7.
2749
2750  The "data" file contains a fixed "Link" for America/Shiprock.
2751
2752
2753Release 94h - 1994-12-10 12:51:14 -0500
2754
2755  The files:
2756
2757  *	incorporate the changes to "zdump" and "date" to make changes to
2758	the "TZ" environment variable permanent;
2759
2760  *	incorporate the table changes by Paul Eggert;
2761
2762  *	include (and document) support for universal time specifications in
2763	data files - but do not (yet) include use of this feature in the
2764	data files.
2765
2766  Think of this as "TZ Classic" - the software has been set up not to break if
2767  universal time shows up in its input, and data entries have been
2768  left as is so as not to break existing implementations.
2769
2770
2771Release data94f - 1994-08-20 12:56:09 -0400
2772
2773  (with thanks!) the latest data updates from Paul Eggert
2774
2775
2776Release data94e - 1994-06-04 13:13:53 -0400
2777
2778  [not summarized]
2779
2780
2781Release code94g - 1994-05-05 12:14:07 -0400
2782
2783  fix missing "optind.c" and a reference to it in the Makefile
2784
2785
2786Release code94f - 1994-05-05 13:00:33 -0000
2787  [tzcode94f.tar.gz is missing!]
2788
2789  changes to avoid overflow in difftime, as well as changes to cope
2790  with the 52/53 challenge in strftime
2791
2792
2793Release code94e - 1994-03-30 23:32:59 -0500
2794
2795  change for the benefit of PCTS
2796
2797
2798Release 94d - 1994-02-24 15:42:25 -0500
2799
2800  Avoid clashes with POSIX semantics for zones such as GMT+4.
2801
2802  Some other very minor housekeeping is also present.
2803
2804
2805Release code94c - 1994-02-10 08:52:40 -0500
2806
2807  Fix bug where mkdirs was broken unless you compile with
2808  -fwritable-strings (which is generally losing to do).
2809
2810
2811Release 94b - 1994-02-07 10:04:33 -0500
2812
2813  work by Paul Eggert who notes:
2814
2815  I found another book of time zone histories by E W Whitman; it's not
2816  as extensive as Shanks but has a few goodies of its own.  I used it
2817  to update the tables.  I also fixed some more as a result of
2818  correspondence with Adam David and Peter Ilieve, and move some stray
2819  links from 'europe' to 'backward'.  I corrected some scanning errors
2820  in usno1989.
2821
2822  As far as the code goes, I fixed zic to allow years in the range
2823  INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900.
2824  And I cleaned up the zic documentation a little bit.
2825
2826
2827Release data94a - 1994-02-03 08:58:54 -0500
2828
2829  It simply incorporates the recently announced leap second into the
2830  "leapseconds" file.
2831
2832
2833Release 93g - 1993-11-22 17:28:27 -0500
2834
2835  Paul Eggert has provided a good deal of historic information (based
2836  on Shanks), and there are some code changes to deal with the buglets
2837  that crawled out in dealing with the new information.
2838
2839
2840Release 93f - 1993-10-15 12:27:46 -0400
2841
2842  Paul Eggert's changes
2843
2844
2845Release 93e - 1993-09-05 21:21:44 -0400
2846
2847  This has updated data for Israel, England, and Kwajalein.  There's
2848  also an update to "zdump" to cope with Kwajalein's 24-hour jump.
2849  Thanks to Paul Eggert and Peter Ilieve for the changes.
2850
2851
2852Release 93d - 1993-06-17 23:34:17 -0400
2853
2854  new fix and new data on Israel
2855
2856
2857Release 93c - 1993-06-06 19:31:55 -0400
2858
2859  [not summarized]
2860
2861
2862Release 93b - 1993-02-02 14:53:58 -0500
2863
2864  updated "leapseconds" file
2865
2866
2867Release 93 - 1993-01-08 07:01:06 -0500
2868
2869  At kre's suggestion, the package has been split in two - a code piece
2870  (which also includes documentation) that's only of use to folks who
2871  want to recompile things and a data piece useful to anyone who can
2872  run "zic".
2873
2874  The new version has a few changes to the data files, a few
2875  portability changes, and an off-by-one fix (with thanks to
2876  Tom Karzes at deshaw.com for providing a description and a
2877  solution).
2878
2879
2880Release 92c - 1992-11-21 17:35:36 -0000
2881  [tz92c.tar.Z is missing!]
2882
2883  The fallout from the latest round of DST transitions.
2884
2885  There are changes for Portugal, Saskatchewan, and "Pacific-New";
2886  there's also a change to "zic.c" that makes it portable to more systems.
2887
2888
2889Release 92 - 1992-04-25 18:17:03 -0000
2890  [tz92.tar.Z is missing!]
2891
2892  By popular demand (well, at any rate, following a request by kre at munnari)
2893
2894
2895The 1989 update of the time zone package featured:
2896
2897  *	POSIXization (including interpretation of POSIX-style TZ environment
2898	variables, provided by Guy Harris),
2899  *	ANSIfication (including versions of "mktime" and "difftime"),
2900  *	SVIDulation (an "altzone" variable)
2901  *	MACHination (the "gtime" function)
2902  *	corrections to some time zone data (including corrections to the rules
2903	for Great Britain and New Zealand)
2904  *	reference data from the United States Naval Observatory for folks who
2905	want to do additional time zones
2906  *	and the 1989 data for Saudi Arabia.
2907
2908  (Since this code will be treated as "part of the implementation" in some
2909  places and as "part of the application" in others, there's no good way to
2910  name functions, such as timegm, that are not part of the proposed ANSI C
2911  standard; such functions have kept their old, underscore-free names in this
2912  update.)
2913
2914  And the "dysize" function has disappeared; it was present to allow
2915  compilation of the "date" command on old BSD systems, and a version of "date"
2916  is now provided in the package.  The "date" command is not created when you
2917  "make all" since it may lack options provided by the version distributed with
2918  your operating system, or may not interact with the system in the same way
2919  the native version does.
2920
2921  Since POSIX frowns on correct leap second handling, the default behavior of
2922  the "zic" command (in the absence of a "-L" option) has been changed to omit
2923  leap second information from its output files.
2924
2925
2926-----
2927Notes
2928
2929This file contains copies of the part of each release announcement
2930that talks about the changes in that release.  The text has been
2931adapted and reformatted for the purposes of this file.
2932
2933Typically a release R consists of a pair of tarball files,
2934tzcodeR.tar.gz and tzdataR.tar.gz.  However, some releases (e.g.,
2935code2010a, data2012c) consist of just one or the other tarball, and a
2936few (e.g., code2012c-data2012d) have tarballs with mixed version
2937numbers.
2938
2939Release time stamps are taken from the release's commit (for newer,
2940git releases), from the newest file in the tarball (for older
2941releases, where this info is available) or from the email announcing
2942the release (if all else fails; these are marked with a time zone of
2943-0000 and an "is missing!" comment).
2944
2945Earlier versions of the code and data were not announced on the tz
2946list and are not summarized here.
2947
2948This file is in the public domain.
2949
2950Local Variables:
2951coding: utf-8
2952End:
2953