diff options
Diffstat (limited to 'contrib/tzdata/NEWS')
| -rw-r--r-- | contrib/tzdata/NEWS | 89 |
1 files changed, 88 insertions, 1 deletions
diff --git a/contrib/tzdata/NEWS b/contrib/tzdata/NEWS index 086151073a3b..701e490e4834 100644 --- a/contrib/tzdata/NEWS +++ b/contrib/tzdata/NEWS @@ -1,5 +1,91 @@ News for the tz database +Release 2022g - 2022-11-29 08:58:31 -0800 + + Briefly: + The northern edge of Chihuahua changes to US timekeeping. + Much of Greenland stops changing clocks after March 2023. + Fix some pre-1996 timestamps in northern Canada. + C89 is now deprecated; please use C99 or later. + Portability fixes for AIX, libintl, MS-Windows, musl, z/OS + In C code, use more C23 features if available. + C23 timegm now supported by default + Fixes for unlikely integer overflows + + Changes to future timestamps + + In the Mexican state of Chihuahua, the border strip near the US + will change to agree with nearby US locations on 2022-11-30. + The strip's western part, represented by Ciudad Juárez, switches + from -06 all year to -07/-06 with US DST rules, like El Paso, TX. + The eastern part, represented by Ojinaga, will observe US DST next + year, like Presidio, TX. (Thanks to Heitor David Pinto.) + A new Zone America/Ciudad_Juarez splits from America/Ojinaga. + + Much of Greenland, represented by America/Nuuk, stops observing + winter time after March 2023, so its daylight saving time becomes + standard time. (Thanks to Jonas Nyrup and Jürgen Appel.) + + Changes to past timestamps + + Changes for pre-1996 northern Canada (thanks to Chris Walton): + + Merge America/Iqaluit and America/Pangnirtung into the former, + with a backward compatibility link for the latter name. + There is no good evidence the two locations differ since 1970. + This change affects pre-1996 America/Pangnirtung timestamps. + + Cambridge Bay, Inuvik, Iqaluit, Rankin Inlet, Resolute and + Yellowknife did not observe DST in 1965, and did observe DST + from 1972 through 1979. + + Whitehorse moved from -09 to -08 on 1966-02-27, not 1967-05-28. + + Colombia's 1993 fallback was 02-06 24:00, not 04-04 00:00. + (Thanks to Alois Treindl.) + + Singapore's 1981-12-31 change was at 16:00 UTC (23:30 local time), + not 24:00 local time. (Thanks to Geoff Clare via Robert Elz.) + + Changes to code + + Although tzcode still works with C89, bugs found in recent routine + maintenance indicate that bitrot has set in and that in practice + C89 is no longer used to build tzcode. As it is a maintenance + burden, support for C89 is planned to be removed soon. Instead, + please use compilers compatible with C99, C11, C17, or C23. + + timegm, which tzcode implemented in 1989, will finally be + standardized 34 years later as part of C23, so timegm is now + supported even if STD_INSPIRED is not defined. + + Fix bug in zdump's tzalloc emulation on hosts that lack tm_zone. + (Problem reported by Đoàn Trần Công Danh.) + + Fix bug in zic on hosts where malloc(0) yields NULL on success. + (Problem reported by Tim McBrayer for AIX 6.1.) + + Fix zic configuration to avoid linkage failures on some platforms. + (Problems reported by Gilmore Davidson and Igor Ivanov.) + + Work around MS-Windows nmake incompatibility with POSIX. + (Problem reported by Manuela Friedrich.) + + Port mktime and strftime to debugging platforms where accessing + uninitialized data has undefined behavior (strftime problem + reported by Robert Elz). + + Check more carefully for unlikely integer overflows, preferring + C23 <stdckdint.h> to overflow checking by hand, as the latter has + had obscure bugs. + + Changes to build procedure + + New Makefile rule check_mild that skips checking whether Link + lines are in the file 'backward'. (Inspired by a suggestion from + Stephen Colebourne.) + + Release 2022f - 2022-10-28 18:04:57 -0700 Briefly: @@ -16,7 +102,7 @@ Release 2022f - 2022-10-28 18:04:57 -0700 In C code, use some C23 features if available. Remove no-longer-needed workaround for Qt bug 53071. - Changes to future timestamps. + Changes to future timestamps Mexico will no longer observe DST after 2022, except for areas near the US border that continue to observe US DST rules. @@ -24,6 +110,7 @@ Release 2022f - 2022-10-28 18:04:57 -0700 from -07 (-06 with DST) to year-round -06, thus not changing its clocks that day. The new law states that Chihuahua near the US border no longer observes US DST. + (Thanks to gera for the heads-up about Chihuahua.) Fiji will not observe DST in 2022/3. (Thanks to Shalvin Narayan.) For now, assume DST is suspended indefinitely. |