| NEWS (9fbeeb6e38310b4f42a14c4b043bbee82c5e4752) | NEWS (eebb9c2caea1584773ae4cec311cee1eea5b1655) |
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| 1News for the tz database 2 | 1News for the tz database 2 |
| 3Release 2023d - 2023-12-21 20:02:24 -0800 4 5 Briefly: 6 Ittoqqortoormiit, Greenland changes time zones on 2024-03-31. 7 Vostok, Antarctica changed time zones on 2023-12-18. 8 Casey, Antarctica changed time zones five times since 2020. 9 Code and data fixes for Palestine timestamps starting in 2072. 10 A new data file zonenow.tab for timestamps starting now. 11 12 Changes to future timestamps 13 14 Ittoqqortoormiit, Greenland (America/Scoresbysund) joins most of 15 the rest of Greenland's timekeeping practice on 2024-03-31, by 16 changing its time zone from -01/+00 to -02/-01 at the same moment 17 as the spring-forward transition. Its clocks will therefore not 18 spring forward as previously scheduled. The time zone change 19 reverts to its common practice before 1981. 20 21 Fix predictions for DST transitions in Palestine in 2072-2075, 22 correcting a typo introduced in 2023a. 23 24 Changes to past and future timestamps 25 26 Vostok, Antarctica changed to +05 on 2023-12-18. It had been at 27 +07 (not +06) for years. (Thanks to Zakhary V. Akulov.) 28 29 Change data for Casey, Antarctica to agree with timeanddate.com, 30 by adding five time zone changes since 2020. Casey is now at +08 31 instead of +11. 32 33 Changes to past tm_isdst flags 34 35 Much of Greenland, represented by America/Nuuk, changed its 36 standard time from -03 to -02 on 2023-03-25, not on 2023-10-28. 37 This does not affect UTC offsets, only the tm_isdst flag. 38 (Thanks to Thomas M. Steenholdt.) 39 40 New data file 41 42 A new data file zonenow.tab helps configure applications that use 43 timestamps dated from now on. This simplifies configuration, 44 since users choose from a smaller Zone set. The file's format is 45 experimental and subject to change. 46 47 Changes to code 48 49 localtime.c no longer mishandles TZif files that contain a single 50 transition into a DST regime. Previously, it incorrectly assumed 51 DST was in effect before the transition too. (Thanks to Alois 52 Treindl for debugging help.) 53 54 localtime.c's timeoff no longer collides with OpenBSD 7.4. 55 56 The C code now uses _Generic only if __STDC_VERSION__ says the 57 compiler is C11 or later. 58 59 tzselect now optionally reads zonenow.tab, to simplify when 60 configuring only for timestamps dated from now on. 61 62 tzselect no longer creates temporary files. 63 64 tzselect no longer mishandles the following: 65 66 Spaces and most other special characters in BUGEMAIL, PACKAGE, 67 TZDIR, and VERSION. 68 69 TZ strings when using mawk 1.4.3, which mishandles regular 70 expressions of the form /X{2,}/. 71 72 ISO 6709 coordinates when using an awk that lacks the GNU 73 extension of newlines in -v option-arguments. 74 75 Non UTF-8 locales when using an iconv command that lacks the GNU 76 //TRANSLIT extension. 77 78 zic no longer mishandles data for Palestine after the year 2075. 79 Previously, it incorrectly omitted post-2075 transitions that are 80 predicted for just before and just after Ramadan. (Thanks to Ken 81 Murchison for debugging help.) 82 83 zic now works again on Linux 2.6.16 and 2.6.17 (2006). 84 (Problem reported by Rune Torgersen.) 85 86 Changes to build procedure 87 88 The Makefile is now more compatible with POSIX: 89 * It no longer defines AR, CC, CFLAGS, LDFLAGS, and SHELL. 90 * It no longer uses its own 'cc' in place of CC. 91 * It now uses ARFLAGS, with default specified by POSIX. 92 * It does not use LFLAGS incompatibly with POSIX. 93 * It uses the special .POSIX target. 94 * It quotes special characters more carefully. 95 * It no longer mishandles builds in an ISO 8859 locale. 96 Due to the CC changes, TZDIR is now #defined in a file tzfile.h 97 built by 'make', not in a $(CC) -D option. Also, TZDEFAULT is 98 now treated like TZDIR as they have similar roles. 99 100 Changes to commentary 101 102 Limitations and hazards of the optional support for obsolescent 103 C89 platforms are documented better, along with a tentative 104 schedule for removing this support. 105 106 |
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| 3Release 2023c - 2023-03-28 12:42:14 -0700 4 5 Changes to past and future timestamps 6 7 Model Lebanon's DST chaos by reverting data to tzdb 2023a. 8 (Thanks to Rany Hany for the heads-up.) 9 10 --- 60 unchanged lines hidden (view full) --- 71 72 You can now compile with -DTZNAME_MAXIMUM=N to limit time zone 73 abbreviations to N bytes (default 255). The reference runtime 74 library now rejects POSIX-style TZ strings that contain longer 75 abbreviations, treating them as UTC. Previously the limit was 76 platform dependent and abbreviations were silently truncated to 77 16 bytes even when the limit was greater than 16. 78 | 107Release 2023c - 2023-03-28 12:42:14 -0700 108 109 Changes to past and future timestamps 110 111 Model Lebanon's DST chaos by reverting data to tzdb 2023a. 112 (Thanks to Rany Hany for the heads-up.) 113 114 --- 60 unchanged lines hidden (view full) --- 175 176 You can now compile with -DTZNAME_MAXIMUM=N to limit time zone 177 abbreviations to N bytes (default 255). The reference runtime 178 library now rejects POSIX-style TZ strings that contain longer 179 abbreviations, treating them as UTC. Previously the limit was 180 platform dependent and abbreviations were silently truncated to 181 16 bytes even when the limit was greater than 16. 182 |
| 79 The code by default is now designed for C99 or later. To build in 80 a C89 environment, compile with -DPORT_TO_C89. To support C89 81 callers of the tzcode library, compile with -DSUPPORT_C89. The 82 two new macros are transitional aids planned to be removed in a 83 future version, when C99 or later will be required. | 183 The code by default is now designed for C99 or later. To build on 184 a mostly-C89 platform, compile with -DPORT_TO_C89; this should 185 work on C89 platforms that also support C99 'long long' and 186 perhaps a few other extensions to C89. To support C89 callers of 187 tzcode's library, compile with -DSUPPORT_C89; however, this could 188 trigger latent bugs in C99-or-later callers. The two new macros 189 are transitional aids planned to be removed in a future version 190 (say, in 2029), when C99 or later will be required. |
| 84 85 The code now builds again on pre-C99 platforms, if you compile 86 with -DPORT_TO_C89. This fixes a bug introduced in 2022f. 87 88 On C23-compatible platforms tzcode no longer uses syntax like 89 'static [[noreturn]] void usage(void);'. Instead, it uses 90 '[[noreturn]] static void usage(void);' as strict C23 requires. 91 (Problem reported by Houge Langley.) --- 626 unchanged lines hidden (view full) --- 718 outputs the expiration by appending a no-change entry to the leap 719 second table. Although this should work well with most TZif 720 readers, it does not conform to Internet RFC 8536 and some pickier 721 clients (including tzdb 2017c through 2021a) reject it, so 722 "Expires" directives are currently disabled by default. To enable 723 them, set the EXPIRES_LINE Makefile variable. If a TZif file uses 724 this new feature it is marked with a new TZif version number 4, 725 a format intended to be documented in a successor to RFC 8536. | 191 192 The code now builds again on pre-C99 platforms, if you compile 193 with -DPORT_TO_C89. This fixes a bug introduced in 2022f. 194 195 On C23-compatible platforms tzcode no longer uses syntax like 196 'static [[noreturn]] void usage(void);'. Instead, it uses 197 '[[noreturn]] static void usage(void);' as strict C23 requires. 198 (Problem reported by Houge Langley.) --- 626 unchanged lines hidden (view full) --- 825 outputs the expiration by appending a no-change entry to the leap 826 second table. Although this should work well with most TZif 827 readers, it does not conform to Internet RFC 8536 and some pickier 828 clients (including tzdb 2017c through 2021a) reject it, so 829 "Expires" directives are currently disabled by default. To enable 830 them, set the EXPIRES_LINE Makefile variable. If a TZif file uses 831 this new feature it is marked with a new TZif version number 4, 832 a format intended to be documented in a successor to RFC 8536. |
| 833 The old-format "#expires" comments are now treated solely as 834 comments and have no effect on the TZif files. |
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| 726 727 zic -L LEAPFILE -r @LO no longer generates an invalid TZif file 728 that omits leap second information for the range LO..B when LO 729 falls between two leap seconds A and B. Instead, it generates a 730 TZif version 4 file that represents the previously missing 731 information. 732 733 The TZif reader now allows the leap second table to begin with a --- 3563 unchanged lines hidden (view full) --- 4297 The output of 'zdump --version', and of 'zic --version', now 4298 uses a format that is more typical for --version. 4299 (Thanks to Joseph S. Myers.) 4300 4301 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 4302 now uses tz@iana.org rather than the old elsie address. 4303 4304 zic -v now complains about abbreviations that are less than 3 | 835 836 zic -L LEAPFILE -r @LO no longer generates an invalid TZif file 837 that omits leap second information for the range LO..B when LO 838 falls between two leap seconds A and B. Instead, it generates a 839 TZif version 4 file that represents the previously missing 840 information. 841 842 The TZif reader now allows the leap second table to begin with a --- 3563 unchanged lines hidden (view full) --- 4406 The output of 'zdump --version', and of 'zic --version', now 4407 uses a format that is more typical for --version. 4408 (Thanks to Joseph S. Myers.) 4409 4410 The output of 'tzselect --help', 'zdump --help', and 'zic --help' 4411 now uses tz@iana.org rather than the old elsie address. 4412 4413 zic -v now complains about abbreviations that are less than 3 |
| 4305 or more than 6 characters, as per Posix. Formerly, it checked | 4414 or more than 6 characters, as per POSIX. Formerly, it checked |
| 4306 for abbreviations that were more than 3. 4307 4308 'make public' no longer puts its temporary directory under /tmp, 4309 and uses the just-built zic rather than the system zic. 4310 4311 Various fixes to documentation and commentary. 4312 4313 --- 148 unchanged lines hidden (view full) --- 4462 change not happened - that's the "missing" sccs version id). 4463 4464 4465Release data2011m - 2011-10-24 21:42:16 +0700 4466 4467 In particular, the typos in comments in the data (2011-11-17 should have 4468 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 4469 Tim Parenti noted) have been fixed, and the change for Ukraine has been | 4415 for abbreviations that were more than 3. 4416 4417 'make public' no longer puts its temporary directory under /tmp, 4418 and uses the just-built zic rather than the system zic. 4419 4420 Various fixes to documentation and commentary. 4421 4422 --- 148 unchanged lines hidden (view full) --- 4571 change not happened - that's the "missing" sccs version id). 4572 4573 4574Release data2011m - 2011-10-24 21:42:16 +0700 4575 4576 In particular, the typos in comments in the data (2011-11-17 should have 4577 been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that 4578 Tim Parenti noted) have been fixed, and the change for Ukraine has been |
| 4470 made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to 4471 Tim Parenti, and also Denys Gavrysh) | 4579 made in all 4 Ukrainian zones, rather than just Europe/Kiev 4580 (again, thanks to Tim Parenti, and also Denys Gavrysh). |
| 4472 4473 In addition, I added Europe/Tiraspol to zone.tab. 4474 4475 This time, all the files have new version numbers... (including the files 4476 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 4477 version numbers there...) 4478 4479 --- 1534 unchanged lines hidden --- | 4581 4582 In addition, I added Europe/Tiraspol to zone.tab. 4583 4584 This time, all the files have new version numbers... (including the files 4585 otherwise unchanged in 2011m that were changed in 2011l but didn't get new 4586 version numbers there...) 4587 4588 --- 1534 unchanged lines hidden --- |