diff options
Diffstat (limited to 'contrib/tzcode/NEWS')
| -rw-r--r-- | contrib/tzcode/NEWS | 109 |
1 files changed, 106 insertions, 3 deletions
diff --git a/contrib/tzcode/NEWS b/contrib/tzcode/NEWS index 83b8b8c8d39c..8c0771641ef0 100644 --- a/contrib/tzcode/NEWS +++ b/contrib/tzcode/NEWS @@ -1,5 +1,108 @@ News for the tz database +Release 2025b - 2025-03-22 13:40:46 -0700 + + Briefly: + New zone for Aysén Region in Chile which moves from -04/-03 to -03. + + Changes to future timestamps + + Chile's Aysén Region moves from -04/-03 to -03 year-round, joining + Magallanes Region. The region will not change its clocks on + 2025-04-05 at 24:00, diverging from America/Santiago and creating a + new zone America/Coyhaique. (Thanks to Yonathan Dossow.) Model + this as a change to standard offset effective 2025-03-20. + + Changes to past timestamps + + Iran switched from +04 to +0330 on 1978-11-10 at 24:00, not at + year end. (Thanks to Roozbeh Pournader.) + + Changes to code + + 'zic -l TIMEZONE -d . -l /some/other/file/system' no longer + attempts to create an incorrect symlink, and no longer has a + read buffer underflow. (Problem reported by Evgeniy Gorbanev.) + + +Release 2025a - 2025-01-15 10:47:24 -0800 + + Briefly: + Paraguay adopted permanent -03 starting spring 2024. + Improve pre-1991 data for the Philippines. + Etc/Unknown is now reserved. + + Changes to future timestamps + + Paraguay stopped changing its clocks after the spring-forward + transition on 2024-10-06, so it is now permanently at -03. + (Thanks to Heitor David Pinto and Even Scharning.) + This affects timestamps starting 2025-03-22, as well as the + obsolescent tm_isdst flags starting 2024-10-15. + + Changes to past timestamps + + Correct timestamps for the Philippines before 1900, and from 1937 + through 1990. (Thanks to P Chan for the heads-up and citations.) + This includes adjusting local mean time before 1899; fixing + transitions in September 1899, January 1937, and June 1954; adding + transitions in December 1941, November 1945, March and September + 1977, and May and July 1990; and removing incorrect transitions in + March and September 1978. + + Changes to data + + Add zone1970.tab lines for the Concordia and Eyre Bird Observatory + research stations. (Thanks to Derick Rethans and Jule Dabars.) + + Changes to code + + strftime %s now generates the correct numeric string even when the + represented number does not fit into time_t. This is better than + generating the numeric equivalent of (time_t) -1, as strftime did + in TZDB releases 96a (when %s was introduced) through 2020a and in + releases 2022b through 2024b. It is also better than failing and + returning 0, as strftime did in releases 2020b through 2022a. + + strftime now outputs an invalid conversion specifier as-is, + instead of eliding the leading '%', which confused debugging. + + An invalid TZ now generates the time zone abbreviation "-00", not + "UTC", to help the user see that an error has occurred. (Thanks + to Arthur David Olson for suggesting a "wrong result".) + + mktime and timeoff no longer incorrectly fail merely because a + struct tm component near INT_MIN or INT_MAX overflows when a + lower-order component carries into it. + + TZNAME_MAXIMUM, the maximum number of bytes in a proleptic TZ + string's time zone abbreviation, now defaults to 254 not 255. + This helps reduce the size of internal state from 25480 to 21384 + on common platforms. This change should not be a problem, as + nobody uses such long "abbreviations" and the longstanding tzcode + maximum was 16 until release 2023a. For those who prefer no + arbitrary limits, you can now specify TZNAME_MAXIMUM values up to + PTRDIFF_MAX, a limit forced by C anyway; formerly tzcode silently + misbehaved unless TZNAME_MAXIMUM was less than INT_MAX. + + tzset and related functions no longer leak a file descriptor if + another thread forks or execs at about the same time and if the + platform has O_CLOFORK and O_CLOEXEC respectively. Also, the + functions no longer let a TZif file become a controlling terminal. + + 'zdump -' now reads TZif data from /dev/stdin. + (From a question by Arthur David Olson.) + + Changes to documentation + + The name Etc/Unknown is now reserved: it will not be used by TZDB. + This is for compatibility with CLDR, which uses the string + "Etc/Unknown" for an unknown or invalid timezone. (Thanks to + Justin Grant, Mark Davis, and Guy Harris.) + + Cite Internet RFC 9636, which obsoletes RFC 8536 for TZif format. + + Release 2024b - 2024-09-04 12:27:47 -0700 Briefly: @@ -116,7 +219,7 @@ Release 2024b - 2024-09-04 12:27:47 -0700 Changes to commentary Commentary about historical transitions in Portugal and her former - colonies has been expanded with links to many relevant legislation. + colonies has been expanded with links to relevant legislation. (Thanks to Tim Parenti.) @@ -204,10 +307,10 @@ Release 2023d - 2023-12-21 20:02:24 -0800 changing its time zone from -01/+00 to -02/-01 at the same moment as the spring-forward transition. Its clocks will therefore not spring forward as previously scheduled. The time zone change - reverts to its common practice before 1981. + reverts to its common practice before 1981. (Thanks to Jule Dabars.) Fix predictions for DST transitions in Palestine in 2072-2075, - correcting a typo introduced in 2023a. + correcting a typo introduced in 2023a. (Thanks to Jule Dabars.) Changes to past and future timestamps |