- tz-announce - lists.iana.org

2025b release of tz code and data available
by Paul Eggert March 22, 2025

March 22, 2025

The 2025b release of the tz code and data is available. This release contains the following changes: 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.) Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2025b.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2025b.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2025b.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit 7e1145bfdb9630c127841dc8ce808a937a300938 dated 2025-03-22 13:40:46 -0700 and tagged '2025b' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 19826b12968c10fc4db7e4b07ba782bfb8590eeebaec6f719d74b92a2e642ab817bd72bceff0015ce52a838edfdb00753b3cd87dd84b35abf2606e5bee445f76 tzcode2025b.tar.gz 7d83741f3cae81fac8131994b43c55b6da7328df18b706e5ee40e9b3212bc506e6f8fc90988b18da424ed59eff69bce593f2783b7b5f18eb483a17aeb94258d6 tzdata2025b.tar.gz 4f4afca86645ca5564a9d7d3ddc36e6b07c15c1b87cd4edbbcae72c6be4e6154e4ad1966407a7081237550301f1093af53dd8a486effb95f7cf3e5721db47c8f tzdb-2025b.tar.lz Here are GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmffIRcACgkQ7ZfpDmKq fjRqwhAAjdPreNSN3pJoZiSwQNVk6oUneEHRlNVDFw1d+DflHG2QW4Cw7wWSRaYi B+yxIV1C61ZwhkAQ1AlscFbpzvHcOtNLEgK5VTwOpgBJ0FsmsEzVUCkGYFtWDpPw qf6ZgdtSrmaPX/V+ceWrRE0oQUjFnlQEO3cwGITlcYlck9YUiQZ+y1gOzPypN+v1 YHuVzoMk4ESTTI/glEJljOQfNcl+GvgnMZRNdZWafpjJ2y68JLofEgemKgJqTu9J IKE6Age2fn2P1lyXlFg1ZTzm11XDIWa8cz37rabNqaybKICeMppSEiIp+BcrMl4p ntQwJyytmm8g2AyGUdHEa9rN97pTag8zzBNmQX/5clcYWIvlp964ul9ptXrBkexN iv+Xi2U1zFg+Wo+ytMyj1q5fhBPTe1rNsnngbrgbGFx0t5h+OOVIPxMCAQiKgGg3 w6V59jgKThJ4EbFaCKV1tN3eThxeSrmCEb6zQEGlS5QKOyTnpQNCEAlJlJ+JyeDo tMbPfCzR9EJjrrMB50qMNK9bXJK3NjsOVicJkv4aruVPfPZ1RrAD6ZDTUk7Yxo9x WHT68C2XIde67N7UIcV4gWgbuZKKagkqPnt+dtn8C/5EML1ANEhtF2is0PqqTXpI ol9XLYC5mnlEQB/F1Bu7EppPCMu7qCaFWQCbvvXaaYjUhiupFPU= =EgQ1 -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmffIRcACgkQ7ZfpDmKq fjS6yw//Wdqj0sipbfTMHAJh3y5065wUkwJhi4cbMbpG1MfJ7HQOeF/ISXBnQo2L RIzpRPswIUweKziBQx5+f+VgViWJTJRTbb2Vk0i1SfnQ6BfeEmqIXwxa87rSeCEk vBeur6mnv3Nc/f9HVvKBqx9ux6FIPWMoQbuDZyNh/GfAvrCp69YkC4miZlo8D1M5 QKoNqLB2B/JTeFVdchVYu9Jxyc2LGsSM9SDTuDDHKQyMyZN/93vJiSzfUMkzW6AF dJif5zWaj2YfrcMFP87IMKH9rAA6XrKNbf+0Xu7AWKpMW6vu30NyMoLQvuo1Gf0g uFxqFTu7fVt6ZzO2cVFuzS/MPj8pufPng88gOHpU34ASID5DB5hf98r7fxmn3jwc aBiecrqpq4F4GEqrBQHGVugFM95iBElvl5kEupO0C/8wqvV7gWoo8Qiaix7b/DE4 zpc4z8wNHntqjeP3Qrv+zX9wfZThYoX/j8UuIVZEhm1o/vHeNn5zBZz55jCQ4KOc Sffl68lWjdLkcS4edsaM1GyPsFnqaFP6FZ95zrhyl/mpsDNJggIaL3RuajMIMCBt othXosBAuBKlv3gqXBIEDaifp2aqBo0YgUUJhcVtyv+advzcUgeppnMUPh0US66R inVSt7pMQ8ubYcDQzDchoVPEay/69SPaRRd3W9unQGCBepjaXGo= =W7AG -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmffIRkACgkQ7ZfpDmKq fjRvqQ//cupgXsGqL6buntdGU8QnbY79jmNbXkuzSbjiAx+uh+sCoS34Rr9eO4Kg mFdVaPqZ704ZvI7yzh6amjpkwdYalmhjVogJ3AIHSlAV69UgedztED18AjQ53/Hj gRqqppZacgUmVO4GqybEb/f4toWfnVi8HuCY++q1WkMgQsAqOE9DIJlJOTK5BAEo Iy6+vAigXc7LyveyBP/2yOOoPTkWTRTURfXHXgQxgKuGtDJHnp12j2MPhzag5s64 KrInD6ZB1ZcpDw9BpDd+LmB1gZizwShadXbiMOi8ROC6JwR8oafZJq3rwonSkJLH kMg6VUQr3cQmu8Zd5s9yYpZmx4rMBR+9Hsz5bn0cBLSe478LtmoKI6vI37mZ048S PRTwlHnXi1/RuxovhusPiaoAf3VUN8IxhL2V4NV9D2Pn+iu3Fhj35BlM3XOn1RpH 3K3qi/Wr4XRX6jlPLQ42opBnkKorL21+Tz21+yHDOXxbF+9fYmZOaMaZwl3AjX66 QbWEN8FG+2UEOHVSyxjLKru97TV+RXSo/A1IBwTHALeaiLSc+V1zSTMMrAQVSDPm Rn1VXPc9Jff00LEM0CElS4X719d/0a0Knbs9OjIbp2bmZEun8zTGHOPEtJ8PWrc6 ficDmgynqV89laKtZ7VsUoMgHEKv7dCs1HdFBYQ5qvWW/JiKZhU= =qJJK -----END PGP SIGNATURE-----

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2025a release of tz code and data available
by Paul Eggert Jan. 16, 2025

Jan. 16, 2025

The 2025a release of the tz code and data is available. This release contains the following changes: Briefly: Paraguay adopts permanent -03 starting spring 2024. Improve pre-1991 data for the Philippines. Etc/Unknown is now reserved. Changes to future timestamps Paraguay will stop 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. Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2025a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2025a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2025a.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit a8e2fcd87bc5f83fec0a76652095e8d7881b0763 dated 2025-01-15 10:47:24 -0800 and tagged '2025a' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 308f6a3d6ebfa18446f8296e5c799e18dccecd79ace3ba004d3f233892c7428faae152b217b22d229c59dd4e0faafee797d8b3583b58fa982b81f7cc7347f502 tzcode2025a.tar.gz 93b8f939d39bdfe451e262666f9099c529c96c49d14c08e3611560ca660e12e16d08a22b145d615e00570fb194881618d6f9a0a617c119ab447be03279d747c3 tzdata2025a.tar.gz 1e8c4e141158d63ca5c39babc9d18c32df14e2e59bc7649a7fed8c3e577f7b175bafa43883cf351139ff198515f5f8c22b1418e2ac7efb7f837faa8f61d2574d tzdb-2025a.tar.lz Here are GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmeIA2oACgkQ7ZfpDmKq fjT4TA//dFIBsmsl3OJ7QdI3lnySSQWyNnZQjsue3qtw7dUp0nbbFd7QGegrVDSC zrY+v51AVm9sk9hLdLQuyVFm5xRqXuBp2fC70wFeCCocEMp4HnhOogJVXMqQz+Dy AFZ8U7HmtNUI+ca9MTw6WTpQ5DOy6Of5rer3LbicmzBgVQ/UNcoIFZs4qf+RnMYY GKOHfLDLhs/4fQf3+zfELLbavieOoqcQlp8HntZrCuR2zZZNImVkt0/ljtTnHqd/ b0KUMDbYQ2dGsNbpBQS5GhAUjVPeUB5npqfA0ibS1gv1e99yWwGeMmUY3GqFbQWn dNN5LTceS9/H/+thtgN+70g4b2Haz+So91AiXKMNxgvb9qkjqV+2ZFd04ud4hapz +rRV8y1VDP/QEmXwL4zMnx+xkzGr3xTh+0z67R3RBIbL5eRGQojjKN1BLkYTWRsx VfaI51+GJWKjlX1Mo9OoSGGWgRWPgn591dYcep+cKA9jYSMzO48VOsdABIt3tTbX 7zqONqpDt6JZJJL7UdH2A0Lik8nkGFnSAnuuwW948CGh26odotoXAC15xWbK18VN v6T+zGZoLR8PdVlIYPjNUyS0sqo6tZtHa3Nci99+A5XG30oX+ecz/zlyDuRBLWkI 31bmm5423PHZ4N94Yi2V6xAC2G7mHn9m7eYv71C6Pg6fs5vOTgA= =2Ldn -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmeIA2oACgkQ7ZfpDmKq fjREhxAAjB1QDroFoq07V+56IIrJR3pK/x4Z2jBbg53N49Cam1oMZK5Wxm291d0G lPutNQvjiNubnBG4pgMMQ2xEF6jgYY0eFfLlORGK9IoW8e3lnlAqSR9BsOQvWjeA lKfmBkhFXetSJ8gu2ModVybpVIqDaJJ73sNQSsA01MHwz0RLV5CLOHXitJ8lBO68 vdSArRhalLUEIVytAKyy1a0msFdzrrDj/7q6tMV9NDY1xQg4V9TLxnPNds29H0x8 xO2zrDug6zrbg9z994JYkhq9h9DLe5h4F3StnaDwRK8eLLRq5D7ryK77Z8dtyXZf tDPgiNc1MquSg48481dDiUfsRdN5S2OLVFqjyWUuwVKBSkSRv/nBQqisGEybY86T H84D5WA0zlj8mFJyuKFmvGHzzKZ6X7mUNrTObaY3G+QHgHjIKWqO7oog447YOYOG DSA5rSmYrzZp2RXP/doeFZD+2kbNVPlN8zBh6lANABwvFH6IhDI+/OJzGJqeYotz ZWVoU3um6aToMS4Uv2PdBNbH1W1P1pzzMM5TJ/bQO/ujCwaBSTwoDPJT6tW9BLrO gJUWd1AumocieAWc0Vyzbrpzbo7Vc//1LF+s1eI+zWt8925unFrBArvQ4h/PyXsc O5LhOQVm1986y9xy2YyF+Cy5s+xsKvKENQ0NbLIDa+l5MdEdEXc= =NQgW -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmeIA2sACgkQ7ZfpDmKq fjQkcQ/+MWIjE3J5FETCaYxUvElzWIN25Jx4p3dBp4CL/UqD9qW/3CRiRt7KbS5Q 2C1+Hg5DKGAJJ/9/L72t4ttMheskUkGyI/M/xWuG2EKMRPJd3zEPZItSfJOtbBwo vmmTIe9s/yZTkmeoMQ/PVdhci6rwifwUEopxq3V2pTBIBnj6H+hBlSLL8Y7RgbWQ yDlzf1HvfnQ+4xlhtcDNb49iljlrPEwUJZe+2RSPmxAtAHe6SJK4i9tSQlv0fJew whM0//rlihNKRG04TFJ4lw5UeueCKhLL8E/HLbLewVcJcbd4pHMFNmdxi17VHmZj IG1tj75Ff69dyuZiCkuOe9S5SzKlI40FEU3aN1k7wWz3PzBbGBWt9CMxNY35DpLF Di23QeTOvdDEEccjivRVyNc4mwthnylOcmKcE5RYhT45W+Tpr0BhLnE29/ZwZ3Dy EB8wQJvGZWh6LVK2C7unEmQaYmPD+pl8WoZ9MmZHnR0YmNd/NfcefKX/UenLs5+J HIifuTWnzRfA4DQTbV+l/kNUzOo/asoD98qQ6/2inDEQWCZpg1V1sOFcHVYkb6XX LT7PUnC5eiKS8U47KBzTTwkEAWij/LKD+gnksjfkzU/Pn5MpzXm4qwVo7v9yuEal i4nIbqzuY8iK0SYBw0da8W10dFtB3bgtfUuSTXQLCP8sWVI34bY= =B68m -----END PGP SIGNATURE-----

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2024b release of tz code and data available
by Paul Eggert Sept. 5, 2024

Sept. 5, 2024

The 2024b release of the tz code and data is available. This release is prompted by the accumulated weight of many non-urgent changes to both code and data. It changes one timestamp abbreviation, for the long-obsolete System V setting TZ='MET'; see below. Otherwise, the timestamps affected by this release all predate April 2008, so you can skip this release if your application uses only tzdata and does not use older timestamps. This release contains the following changes: Briefly: Improve historical data for Mexico, Mongolia, and Portugal. System V names are now obsolescent. The main data form now uses %z. The code now conforms to RFC 8536 for early timestamps. Support POSIX.1-2024, which removes asctime_r and ctime_r. Assume POSIX.2-1992 or later for shell scripts. SUPPORT_C89 now defaults to 1. Changes to past timestamps Asia/Choibalsan is now an alias for Asia/Ulaanbaatar rather than being a separate Zone with differing behavior before April 2008. This seems better given our wildly conflicting information about Mongolia's time zone history. (Thanks to Heitor David Pinto.) Historical transitions for Mexico have been updated based on official Mexican decrees. The affected timestamps occur during the years 1921-1927, 1931, 1945, 1949-1970, and 1981-1997. The affected zones are America/Bahia_Banderas, America/Cancun, America/Chihuahua, America/Ciudad_Juarez, America/Hermosillo, America/Mazatlan, America/Merida, America/Mexico_City, America/Monterrey, America/Ojinaga, and America/Tijuana. (Thanks to Heitor David Pinto.) Historical transitions for Portugal, represented by Europe/Lisbon, Atlantic/Azores, and Atlantic/Madeira, have been updated based on a close reading of old Portuguese legislation, replacing previous data mainly originating from Whitman and Shanks & Pottenger. These changes affect a few transitions in 1917-1921, 1924, and 1940 throughout these regions by a few hours or days, and various timestamps between 1977 and 1993 depending on the region. In particular, the Azores and Madeira did not observe DST from 1977 to 1981. Additionally, the adoption of standard zonal time in former Portuguese colonies have been adjusted: Africa/Maputo in 1909, and Asia/Dili by 22 minutes at the start of 1912. (Thanks to Tim Parenti.) Changes to past tm_isdst flags The period from 1966-04-03 through 1966-10-02 in Portugal is now modeled as DST, to more closely reflect how contemporaneous changes in law entered into force. Changes to data Names present only for compatibility with UNIX System V (last released in the 1990s) have been moved to 'backward'. These names, which for post-1970 timestamps mostly just duplicate data of geographical names, were confusing downstream uses. Names moved to 'backward' are now links to geographical names. This affects behavior for TZ='EET' for some pre-1981 timestamps, for TZ='CET' for some pre-1947 timestamps, and for TZ='WET' for some pre-1996 timestamps. Also, TZ='MET' now behaves like TZ='CET' and so uses the abbreviation "CET" rather than "MET". Those needing the previous TZDB behavior, which does not match any real-world clocks, can find the old entries in 'backzone'. (Problem reported by Justin Grant.) The main source files' time zone abbreviations now use %z, supported by zic since release 2015f and used in vanguard form since release 2022b. For example, America/Sao_Paulo now contains the zone continuation line "-3:00 Brazil %z", which is less error prone than the old "-3:00 Brazil -03/-02". This does not change the represented data: the generated TZif files are unchanged. Rearguard form still avoids %z, to support obsolescent parsers. Asia/Almaty has been removed from zonenow.tab as it now agrees with Asia/Tashkent for future timestamps, due to Kazakhstan's 2024-02-29 time zone change. Similarly, America/Scoresbysund has been removed, as it now agrees with America/Nuuk due to its 2024-03-31 time zone change. Changes to code localtime.c now always uses a TZif file's time type 0 to handle timestamps before the file's first transition. Formerly, localtime.c sometimes inferred a different time type, in order to handle problematic data generated by zic 2018e or earlier. As it is now safe to assume more recent versions of zic, there is no longer a pressing need to fail to conform RFC 8536 section 3.2, which requires using time type 0 in this situation. This change does not affect behavior when reading TZif files generated by zic 2018f and later. POSIX.1-2024 removes asctime_r and ctime_r and does not let libraries define them, so remove them except when needed to conform to earlier POSIX. These functions are dangerous as they can overrun user buffers. If you still need them, add -DSUPPORT_POSIX2008 to CFLAGS. The SUPPORT_C89 option now defaults to 1 instead of 0, fixing a POSIX-conformance bug introduced in 2023a. tzselect now supports POSIX.1-2024 proleptic TZ strings. Also, it assumes POSIX.2-1992 or later, as practical porting targets now all support that, and it uses some features from POSIX.1-2024 if available. Changes to build procedure 'make check' no longer requires curl and Internet access. The build procedure now assumes POSIX.2-1992 or later, to simplify maintenance. To build on Solaris 10, the only extant system still defaulting to pre-POSIX, prepend /usr/xpg4/bin to PATH. Changes to documentation The documentation now reflects POSIX.1-2024. Changes to commentary Commentary about historical transitions in Portugal and her former colonies has been expanded with links to many relevant legislation. (Thanks to Tim Parenti.) Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2024b.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2024b.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2024b.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit 6903dde39ed637adaafc352c4b6993739253f058 dated 2024-09-04 12:27:47 -0700 and tagged '2024b' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 0e4e872d6c6d9e2ce8c4e567fcbb7658942b8544157d1e48673d9cb989f3af3379fa58e7a71ab98f4a8f2ac6727de1f8c4cd1981053409ebd8989345dc640026 tzcode2024b.tar.gz 0d86686e215672343debb3471b7e7ccb8a27f063f085c9b532d5e0470377843daa0dfb6aee0db4fb9068dd52810c69aeee914a1a7c7e603fdecda7e855020193 tzdata2024b.tar.gz 72446e5cf445515512437c8deaae3063b093aab9620d6441cafaa9b3b71603c857f7ba53557579595788bbc901cd6142404b4db6b0e9f2b23d57b2b3cbc837a8 tzdb-2024b.tar.lz Here are GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmbYtYgACgkQ7ZfpDmKq fjTPkRAAvusnEE+0TDcfXqA/eEr4LksyAWMjLcIU+xakuXqbBGbGZIeEeDjT58f5 IWhKZyEc6JPgL9T/0TSBUW0IwC8JqiYkK3oovQPlcQkufwkCe2GNqAEWVRuT9Y4H trFGM53tNJJA6GySNBCvtaglIkj7vCQJ+gQ/NACEcxlxypy0TRRqAG9ZcUT8HpRI Hh5+TTBJdxG9PqLBI/INbKlEvpFovMjV0UXvlqfO/R2vanZTOlanjW3/g0PgzcfO GvNRTC8R0N49rrieGj4iUUDPaSi7rPW9hLX6OQDc3ASUjTXHw7uL1fkVTCUdF+so f6r9UTrTjOofQOjziR1BfA+SRv79mWOLSxW+yJDYLPkPjEEIUnmIoIoSrDXdqXC3 p7nWOJzFGEw7Q8FBBzOtcFPOiLohNe+zg3reAy4P5Uw8P8DeYm0T/jaZUQGLF2gx Xp60+KkzGuorfzPECqzUW4RNT/+7hVChf+bxRQ14upnpx+rjBxZMX9lFEzismF4p v3cCAPJ038CHDSXkwnBefKRLoWhzbov/MxJ+FgbksuhlaO/0OdQsP4e8tv8RhvHk tTl07n7tU8NPO1J6osEIRXggVKW/fo+ifCtmkHqvE21vtSq1NccYZYphkvZlQdmk oHFyAIxRdgEv2iS4KGlXeY062ZiSKAy0LdhEIFcGr59bLE9wPuA= =tdRE -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmbYtYgACgkQ7ZfpDmKq fjRqPA/+N+f7KwPQJYYFtLWudtXxGIVEYDsBtHcqlj20FsdgsKk/9cdm3zKTWFuF a5uKn6plxwN6hmXjrwV7nBV6M8kxeqRP4Zf+rCdNMWhLGSmHmDCU+1m5SPYs/+Xh P2W3pc310pQocGtMIsYoVYrEtQl/K4p7V6jxAaG8QTpWmt0K6RS+LxxfqgKbmq14 tU8Jznx/LBFbvEmQxNAGKzq58ce7yexIRRGvetHGWvwafb9+Vv2CiOx+oCS2GeEF APO2UdbZCiUaTJYZPtg2vnk2pGDrTAO/jsEe486iKinVAOkJyBckn/yqykh5NLCk q+MtRngIinrV88KqpmW1OXuAKjJJLXrveAKoZKVbvMuzBAMG1YvAo9CzBwHYfKhW bxLo9q9HyRgci9xoMOeVi1xabTm+NkhbqQuu15rQLlgXoMYm/4x9PbP7JSeuB8N0 vyGjyD+tZtDXgPC3AARmpPuabDQQ9BM0RJ5exUOkcAbvYyFE3bVHLPk28iZOzg8r Y/BSUOXIj7Jb+ZOuIkuDRWHvDifTBrpPDDlwY4JWUfRhx2HhrFjD59SJt6kPNsJE KAjVQREtXDtnqu3bZ7AsKzckpFlrlk0vYfeKaL5N3O6iEpggmE0LTWDXRcrzESh5 E1uQBnIrS4CHuso1wZRy0FHJYvSKGbRCN3jHyJBRSGgBTFGOuIY= =AXnJ -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmbYtYkACgkQ7ZfpDmKq fjSLXhAAnP1lRfPZ5pQhV57GAvYgMyrHpQbnBmZUHLESPRlqETzjDiA/n/tpaWBz ypvD91O0O5F2jf7JTGO8OgN3UARuOLE+Ry/gtW01udC4Z083ALsLovJKx7DbaCcc KwxK9Ia1++T/nulJsEH5b+6w78ptUbqnbwIdwzqDnImJn3OFdAJddapI/z6iDDEh 9EzSlykcHec9aYdC9KEFJaPjzABxDlbqhDM3QEkheFHXiZtt6fTg3fH+B3uetvix IfHAyYA6iJxezY/rqr+k5loa+ObTj8Rh11bF0OPJoWVMWLNDDWUa/h/SIm5zfD64 wl2aRw+yYSB1Fp1W9zOxJJyYnJvlBsNBU1KZEjNaCxbjcmeUtwyYv3tl8dq8NABL KhafPI6Cvw8NAI4c7JI2lDbLdLTxRNMar5uDhXPFZ6CGbBGwjyiVR2j73FjgngUk nHC2jw3UudfrkyWArArIwUPz0GKtgkQPTGUnWn1lZZP3QI1rM5Vhk17s88E2Igls AkHZYPI8X6118u+deVsyG9d+8v/vNbPkMMC/wqv4tqJva4Yu8QSWP6ZLFZhO1r6q 2ZHEEGPftF0tZETkWLr4Ndpbny6a2jeNaT9/qBRjSDpD4hIdBgYbfa3jKFlNZAx6 o9xVZy0n5MgXh2FOFFWIepYhQvwngnaw0kf3YqTkk+4xcKsgM3w= =qqXx -----END PGP SIGNATURE-----

1 0

2024a release of tz code and data available
by Paul Eggert Feb. 1, 2024

Feb. 1, 2024

The 2024a release of the tz code and data is available. This release contains the following changes: Briefly: Kazakhstan unifies on UTC+5 beginning 2024-03-01. Palestine springs forward a week later after Ramadan. zic no longer pretends to support indefinite-past DST. localtime no longer mishandles Ciudad Juárez in 2422. Changes to future timestamps Kazakhstan unifies on UTC+5. This affects Asia/Almaty and Asia/Qostanay which together represent the eastern portion of the country that will transition from UTC+6 on 2024-03-01 at 00:00 to join the western portion. (Thanks to Zhanbolat Raimbekov.) Palestine springs forward a week later than previously predicted in 2024 and 2025. (Thanks to Heba Hamad.) Change spring-forward predictions to the second Saturday after Ramadan, not the first; this also affects other predictions starting in 2039. Changes to past timestamps Asia/Ho_Chi_Minh's 1955-07-01 transition occurred at 01:00 not 00:00. (Thanks to Đoàn Trần Công Danh.) From 1947 through 1949, Toronto's transitions occurred at 02:00 not 00:00. (Thanks to Chris Walton.) In 1911 Miquelon adopted standard time on June 15, not May 15. Changes to code The FROM and TO columns of Rule lines can no longer be "minimum" or an abbreviation of "minimum", because TZif files do not support DST rules that extend into the indefinite past - although these rules were supported when TZif files had only 32-bit data, this stopped working when 64-bit TZif files were introduced in 1995. This should not be a problem for realistic data, since DST was first used in the 20th century. As a transition aid, FROM columns like "minimum" are now diagnosed and then treated as if they were the year 1900; this should suffice for TZif files on old systems with only 32-bit time_t, and it is more compatible with bugs in 2023c-and-earlier localtime.c. (Problem reported by Yoshito Umaoka.) localtime and related functions no longer mishandle some timestamps that occur about 400 years after a switch to a time zone with a DST schedule. In 2023d data this problem was visible for some timestamps in November 2422, November 2822, etc. in America/Ciudad_Juarez. (Problem reported by Gilmore Davidson.) strftime %s now uses tm_gmtoff if available. (Problem and draft patch reported by Dag-Erling Smørgrav.) Changes to build procedure The leap-seconds.list file is now copied from the IERS instead of from its downstream counterpart at NIST, as the IERS version is now in the public domain too and tends to be more up-to-date. (Thanks to Martin Burnicki for liaisoning with the IERS.) Changes to documentation The strftime man page documents which struct tm members affect which conversion specs, and that tzset is called. (Problems reported by Robert Elz and Steve Summit.) Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2024a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2024a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2024a.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit 380c07cef01c71c1f93e9709d9f8c79b91cff063 dated 2024-02-01 09:28:56 -0800 and tagged '2024a' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 46da8bfa762c7d109db93e5c060789097fc0e1e38bdad5bb8fec886ef47f138bd03b913a743cd5f7e23dc359a72bfd63e7ffc0de199d2b51e6a174361dbdc43c tzcode2024a.tar.gz 1f09f1b2327cc9e1afc7e9045e83ee3377918dafe1bee2f282b6991828d03b3c70a4d3a17f9207dfb1361bb25bc214a8922a756e84fa114e9ba476226db57236 tzdata2024a.tar.gz f1a3b06ea2b28a0bf968b75f3674f3b64d8226338d42e2ed17aea33e34bff0f9a7a22f4116612e6c81b9b7b57deaee6ed01a6881000fa1042a7f4390b55a1856 tzdb-2024a.tar.lz Here are GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmW716sACgkQ7ZfpDmKq fjTCyxAAvMohPXC5+oZT9T/X0vhIkK5kJOzDF/eptBVzwxa8WDymp4q7UzGCC2Kg 57dWthckzYqrvcz3QBLagF8bFFVCrQKPiKbMZUYTin+eWrxLUDx1sHOPaxWMPFrY aHjy/HGVMa43P7wp/3iaLLwvuVmcxcWiLy5ebQbXQrFbe09KJDb6mK4ClR+1KdLd aF8BCSU6nI0KQz1bRqmHlm+J7X1ll0E8YymWoK7Ujwht8SYRqpJOqOv2XJ8g0wFO wip6p535KQ3iEIQqc25Swn4v3W26hfa2yZXMh0edgQe1uqqzV3rLi7n8sOrSYjjd uwzyVC6wADGM2PgH4dq6YOeOs9jB+wTm6MEH4/GXP0IpPNPswUnHLK/WJGTHidW4 HJ0hY50S24wMxNYiaiuSbo8Lgefky3GZKZo+umXVKlPjsSrvImaWmFH2gOqvbZIi Ujl/NjDUmH7C4UDGx/ZkLwpOwjcu28hcacLkd6ad3hnFuZhG28yKd9rdQFn6/PTL rX8uAtuJ0GOREWAQWBNKj2dnyOrE45C+EbbuSCobAzvSXMyJ9svb7WuawmhqEjf/ DXY3VJ7pEAViQ/Hqtkxp8R9JfvZ6XCL8EF18eReeJdejjVObNIoUMOyPFX5HXJbs WS8yEl63iDyzzj4Jnvu5dMv8VlWel4CBCCJSkHjtrX9PewqbGq0= =aSZf -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmW716sACgkQ7ZfpDmKq fjTkQQ/6AqS/VNV6+RbbyLbLuOzh4GvYDMq1xTxGnjj7nwr80ob/wwSVmX7Gf5xt gVgagC75EJyskY6dfUPbSHwmOx8Dk2ttQtEprhhzk+1WpUSPZoy/RYMdWN+JzO3s LekrzU86SAh7yP21qSovYRM5rW02Da5RmiLUmknzBpP2cuZsq3qSPYUEMjB3JO39 OzBq0nyLbUR9nqew/f6fcPviyweqTkZdcDsr/+jNUGDI/kezGQ0u3ExlGc0EmGU0 ISAFB7uSDWgoJlwH3ZBtI4lOxiVQRKXafFcdvmLka0hYDGOm6f2zvkhvLEHVN9xK /V680qKy1vIOkyDRp664P9qZ0951+tpb9I47ip7SLqqBoyWhlfb/SJ2eFfb3k+kx fPkCX89QsqkfSPXySJCO13YYEQXpI2VPdWi0JxDI+LD/VEHITiydrYT+afnn0iyZ bM/TKnqaQ4bhAXdLBj3oUSwFQHEgPgeLOrTmWEdN9YmO5Cwbm1gZvOKZ4u2CYW6I ZM+ZwCuNO1hqYRSoeIaN60fUOneXaOcAejlOS/bJr7hNKUtmAjsSS7S7YGeNgQld LXRDRD3vou/qIHlIhmGpTUlOBl5NXVrP42w91nBYEwNyY4lbKLw22GS4FRF1cu9+ wfMfJqY4wwDp/uDMXAfWIXU1AdMg7t1NephMIGg4mivKGYmQmvY= =CvSR -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmW7160ACgkQ7ZfpDmKq fjTlmBAAnPjG9L1PG/4AlnLSdrXhXEVirX6LlmsUjh3DRzXlHjeEHUcD+rEL+wFK cM55uo+yzD7iq1TC1FXxbVKpxFcTxtgNx6Jmz2sHYjymCUmqPFVaj2GtCEwiBaKA CioxHZuQoRaSQnsmGzM/VhC30VMPj1S8SoFNZhbhXkNr0Wxy/f8xxnwcIDRvdzOD 9DvUWqJ5W0jHg/2m4RmbTavsp6tZSdcxoe8R5Ie33tQL7Lwqsze4dkggbzdCFd11 bPhrB9l2mQ6l3KrZ+VQRthL9VJPMrkpgFNK0XiCn+8ctaJS7dFjIspcTtIUbuyiF Z4YMcOUnLdLeL0OwFP1dRNz4kVlLioAO5dfIAHjPdRF0slywcFaw4BWB81Vwwkdy BjkX8nWmFEgYy1DoDYPBf5ju5SNcafPnQ20tO3Cjyzdg57Dc4nN7rd21t6bcPWTw 8FjzOvFoeSjLmzK+4EB5Sx9r0xsP53KSNHYXG272qqkRDtKhi62KNn6ZWR9QMTM7 yIh2OC+yI6Nrp0SAR0CKZQCtM7ghjBQYJeHliW6BzCmAolRaH2Ng5Z+rFDLyxtc2 L+VWkZROyyI5dQrKTpq+pzS6LtidbkM/hyggc0GE2mqGr78f+pEHHXsNkq8xtVNX Z1HLQe0cvORQsi9wH1yNFRlwsflxfN1VHhNhNXvYdtvJLfbwr7M= =Yw45 -----END PGP SIGNATURE-----

1 0

2023d release of tz code and data available
by Paul Eggert Dec. 22, 2023

Dec. 22, 2023

The 2023d release of the tz code and data is available. This release contains the following changes: Briefly: Ittoqqortoormiit, Greenland changes time zones on 2024-03-31. Vostok, Antarctica changed time zones on 2023-12-18. Casey, Antarctica changed time zones five times since 2020. Code and data fixes for Palestine timestamps starting in 2072. A new data file zonenow.tab for timestamps starting now. Changes to future timestamps Ittoqqortoormiit, Greenland (America/Scoresbysund) joins most of the rest of Greenland's timekeeping practice on 2024-03-31, by 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. Fix predictions for DST transitions in Palestine in 2072-2075, correcting a typo introduced in 2023a. Changes to past and future timestamps Vostok, Antarctica changed to +05 on 2023-12-18. It had been at +07 (not +06) for years. (Thanks to Zakhary V. Akulov.) Change data for Casey, Antarctica to agree with timeanddate.com, by adding five time zone changes since 2020. Casey is now at +08 instead of +11. Changes to past tm_isdst flags Much of Greenland, represented by America/Nuuk, changed its standard time from -03 to -02 on 2023-03-25, not on 2023-10-28. This does not affect UTC offsets, only the tm_isdst flag. (Thanks to Thomas M. Steenholdt.) New data file A new data file zonenow.tab helps configure applications that use timestamps dated from now on. This simplifies configuration, since users choose from a smaller Zone set. The file's format is experimental and subject to change. Changes to code localtime.c no longer mishandles TZif files that contain a single transition into a DST regime. Previously, it incorrectly assumed DST was in effect before the transition too. (Thanks to Alois Treindl for debugging help.) localtime.c's timeoff no longer collides with OpenBSD 7.4. The C code now uses _Generic only if __STDC_VERSION__ says the compiler is C11 or later. tzselect now optionally reads zonenow.tab, to simplify when configuring only for timestamps dated from now on. tzselect no longer creates temporary files. tzselect no longer mishandles the following: Spaces and most other special characters in BUGEMAIL, PACKAGE, TZDIR, and VERSION. TZ strings when using mawk 1.4.3, which mishandles regular expressions of the form /X{2,}/. ISO 6709 coordinates when using an awk that lacks the GNU extension of newlines in -v option-arguments. Non UTF-8 locales when using an iconv command that lacks the GNU //TRANSLIT extension. zic no longer mishandles data for Palestine after the year 2075. Previously, it incorrectly omitted post-2075 transitions that are predicted for just before and just after Ramadan. (Thanks to Ken Murchison for debugging help.) zic now works again on Linux 2.6.16 and 2.6.17 (2006). (Problem reported by Rune Torgersen.) Changes to build procedure The Makefile is now more compatible with POSIX: * It no longer defines AR, CC, CFLAGS, LDFLAGS, and SHELL. * It no longer uses its own 'cc' in place of CC. * It now uses ARFLAGS, with default specified by POSIX. * It does not use LFLAGS incompatibly with POSIX. * It uses the special .POSIX target. * It quotes special characters more carefully. * It no longer mishandles builds in an ISO 8859 locale. Due to the CC changes, TZDIR is now #defined in a file tzfile.h built by 'make', not in a $(CC) -D option. Also, TZDEFAULT is now treated like TZDIR as they have similar roles. Changes to commentary Limitations and hazards of the optional support for obsolescent C89 platforms are documented better, along with a tentative schedule for removing this support. Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2023d.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2023d.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2023d.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit cc48c2dfa2f3c21d25ab108bba978b0307ecf0e8 dated 2023-12-21 20:02:24 -0800 and tagged '2023d' in the development GitHub repository at <https://github.com/eggert/tz>. 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1 0

2023c release of tz code and data available
by Paul Eggert March 28, 2023

March 28, 2023

The 2023c release of the tz code and data is available. This release's code and data are identical to 2023a. In other words, this release reverts all changes made in 2023b other than commentary, as that appears to be the best of a bad set of short-notice choices for modeling this week's daylight saving chaos in Lebanon. (Thanks to Rany Hany for the heads-up about the government's announcement this week.) Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2023c.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2023c.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2023c.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit ddb8cf09d54ecc486ed6665edcdd642abccd4eef dated 2023-03-28 12:42:14 -0700 and tagged '2023c' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: fa18bae9c0e7c061bc9d5f5f2eb9967f0e4ddb2baafdee9887fa30cd0c60f4aa6f21eacffb17df0d59d26ff54d08c5dcefa98159309eba497e86443624913a82 tzcode2023c.tar.gz 608bd286ebcbd0004cfdc1da183273f08aff61f90c8867661154453d77a05d421e4c46ad6d066a1fe2e87d5c82ec0f1c0224667a3b35f3180a3eb7f6ff84cbf5 tzdata2023c.tar.gz b59dbfc598b98f325797ff587bd2e8b27aadc52924eeb0b26cd18cdaca56224c436a20950bc73de9b9b46e98d640a24d8cb797a8f49ada15ea2f42a70a6efe22 tzdb-2023c.tar.lz Here are GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmQjQ8MACgkQ7ZfpDmKq fjTp4BAAvitWlH49WQ+Cfs//1bBy7ifW1I5PNXSZFIDSNsZUGhrXOkZ/b6l3jAEF Z76GL7PQb5d/QHdKAIYeDheGnGf/8Wh4PFGzBkiyZgEdeZk6QLtE1n71Fu1x7gca IQOmVTzwVAf9f+fbizsaTarqg30TnPzUsuHiljInOaV8GkTt0VUkIZ5LeH09kdpY Rq6BIiehGikkBLyvCpyCTGZ4H8IKgR0GMkIHWQwj0mw/WROnT+xAfzTUrtD7zJK2 5+Ek2kj0UDB9DbprIkCZyh56W1OZ4m5OuAd9wHdx1ZOPfE6jq0lm+2B2kX4759mQ U66wyATu1qqqlc/2HUe464SWCyNTEDGbCCygfryInKd9Y+QORhK9yOsDfskVcGgX qTE2U20YzMqHP34fgTUsOC+mQ9e+qR1CvnCGAv3y1wpUIj1r9Opq7cI1uCvVE6xn nJhU1oE+z4HjhT2TZSS+gVM8D6p+z096sOkRnFg+mIh7XzSYYSFRojcGLnSAkg+o K68yPfXPu0subUGi5dH1XLQQYM0v0sqCATu5jKwU4YyyHoUuWDi9mooReAkSaj+y KON+VuYMRZZfJqzdc0HcXUsqlY/nK6/INRbtgvEKlMRLBn5oGbWIRnlyQvJA814v fsaewl80tRZAtXs/hwHrSGX1vxMkMaaDk5frG9BG/EkupBZa/rk= =fwRN -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmQjQ8MACgkQ7ZfpDmKq fjScAg/+LKVw3MFKXvXhDAJX9FPL+ZtvFc+XCwkAxylFA8rrLYjNTo+X7vdyu/AV 1YSkQFqPrPJrVMlffRm/NaQI59vOhkIQZ4Ingd0IFzfHIJMSMVU1C359mpUnxgce XLLUA12+Mjo3SEO/QYOZLhkpvzoJ2loPdgAUtraysunZdgYVdOubd8EpbWtZ/d9u cdKJriVWaHwcmEPXmZOcAhjTA2immhIrAd4G1FzuHFJNjdjIzJyXzxATWEk3mQ0z ZOQcpWGzf50OL9Atri4e8Nm4mXjguQHRebfYv8QVHAvxcdjGFc5yqvVrwGaNLGtV oadxHA3J/hmWS7mg7/pYDKabTNeoXrXWEzY8VXRbPnfvtbUXh9g4t9JDlgocHpQQ wAC3Hb/mvMFON68aCPWQeHxcHXOrAm2KHlGblJA9iI364S6v3iK7gd16lzZSbuTy G8jAt7YUilZxyIIV0GVMjQD9oG6bVm6ApccVVIBPHqlW1J09ON0koWRiNGqdbr8F BTh3ORBCo0qU+BvYF6mL9SCIrbGUvr4NdwY9aKaB04HPZz244fD2kLPt1z5v+7K6 cQrhdVQ6CqejhlJXRm4cQdeEzJhgxw+cFc256e8WpoofVu5rDws2d2KQZkqHGiFH A5jSKg2PWfZcqPoTdRg19DlUUdDBH8xybXzK5ExjHdDDO7KInGU= =XC0E -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmQjQ8QACgkQ7ZfpDmKq fjS96g//dxNELnczZASWUk7n+EJ5EbMjamjOOAde6r/Mpy/71DLg0AatISKt+Ph+ 7lAVzQRip6o4mZNZb9PZ6yP3r1rYKUymaOahtiwv5oC2lSmm2jCMRlFslHJ/feQc czOfCfd7ggpmg95Iqx81WYfc2lSbXzNArpvqBEjApqtkOLbpJ7A7s2JFn7o3lnD2 E1gMeiIbM4doq2Dfqzc3sJ2kyn/zmsA2g/HO64DZ9RUiDJlbOAZctIAfDiSkHE8q MTdSIVlKrOXDzmzvN1YMXyIPbo4ZaFCjvSZ5xbEpu8nf1IrLq0WqkU41T+4cq3zD Vq0NHrADU49npWh1qn/PTJunln6I6BHIXzyDAAZL+Ij1lcplRh/ZdszZBxU267Qx 6rvEqeea1jQPEKS2/x9aMSWk4mwooB1pYHjnpgS+ZP1CLHtrWVtf5zU4Z2sODWBd p1otOWWgR1nq7b4qc0OZwwVzuJN8rtptEf0PuxgKZnLLoVmgEpU5WxA5FjhTsJmm 1nbv676DfIN31NOfSGcP12Lcp2KjZ2Cfj++zmQruTlZcjpWYEJiRjiecqELBWo7S jw96jrEUQi6mVn6jhzV0Sxdiig9M0hmzMj0bcx2BvldbUFCbZscAproR9fHeqpZM Q4F6QphFyP5Y3kBKARZZ3HmM6Kc5ZWkG6WzLeTkTdcxqHZLrp8c= =YTzD -----END PGP SIGNATURE-----

1 0

2023b release of tz code and data available
by Paul Eggert March 23, 2023

March 23, 2023

The 2023b release of the tz code and data is available. It follows so closely on the 2023a release because Lebanon's government announced that Lebanon's spring-forward transition previously scheduled for the end of this week has been delayed until April 20. This release contains the following change: Briefly: Lebanon delays the start of DST this year. Changes to future timestamps This year Lebanon springs forward April 20/21 not March 25/26. (Thanks to Saadallah Itani.) Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2023b.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2023b.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2023b.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit 71faa2a55db2c9f21f4099b58c28536673982e0a dated 2023-03-23 19:50:38 -0700 and tagged '2023b' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 94058ceabfdaa62eeff9be804a030f0eb95b4099b62fbb7e55557e8b934c8d883f488a3a6996331e24aebd147d66c19a73fb925a3dd929c630a9e11b51003b7f tzcode2023b.tar.gz 0f697b872ef02109d2098db12d0effc834b2ac5438921e0867f2c70987f305a47dc3eac720c344bb3757c902a7653109621e943564bdfbf00937077c311aa29b tzdata2023b.tar.gz 286ab1bf768dda48d4066d2477de0f3db9c26e55e26c1a4f33b450268255f28d57360bffe602a3bc29f8a281b7e0ff17880fe1d14914d6361f62abb7526e5081 tzdb-2023b.tar.lz Here are GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmQdELYACgkQ7ZfpDmKq fjQpIQ//eOaHIqWDFcotP/ntWHses+E1PaalrArGe6uoGJYR3Aql9GBIM/BrhBZH oiCeRxxsLLoU4ZoJdrEh3Q4q4a3g/j5NGL3oi1ktlwHz1dnJFd2UQ+XlK2mv2/Lb o+cwaM0RV8SZojClxXF/ditXgsJ+EGbSX7WYKX7XfCxdWwFw+ZZPPcYvmXvenFCl wtJWjgo11a3V7OpKk4kfX/EuoNoHTF7uOIr943Id96JFM0z7LET1zaoKzObMs0+l Afyi1Rl0bxO6rlPH+HRJb41cac1YXMcoRkz0rzvaZalEA4FYFYIsA4nbuVB1DGIW xzQLErGgBg9NFLSIQJmocS7V3T3KpSeIXAfUMN3XMUMVfOwv9Fm0ZdzgPEH3/Xhr h/6C1a18Q+xeicqaB7Hm+nybH51sFxajx9xoGcr+Ij+1ze1W4Rk7LnHC6+tsqQ/D N+P1fBEcb33C3/T8G2s+OWNMRInotcqAnZYUqLkFTmNbWEC1xdWdUZGxY+0PxDSX c7UGAgj7E9G4JS684AkcpVgIJUwz0XyQIZkJHudg7FyEjW7U7qIycXUwC+RCVtWb tnJX9TxzP01/kD3R3C8CALByCJW4OTlpwcETqACjUF6JBpAHHbFWGY1znBs/zsDa PSMozhoQ3moWHRBsW3PU7XBsxOf6kDMrqUxWTo1oKVv0Jy5xfO0= =UybO -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmQdELYACgkQ7ZfpDmKq fjQJpg//cdQED6jsk1BnqHOCL1/PPUxJsl1SmDlcAoO4o7Odt5AlTFq6P6zGzRze F+P1P6k9mD09IyiQC3m3wQaROoyAoaErPeuzwmoDT/rBVNRraSE0t8xy2jDytkne CH3f1TMYYqQOWpQnDxzMKByypkNCG9o0ryzhTMWRI9BNnLZqwRnyRFWPdLYM5O7/ DxFk3YbtoB9IoO2LR32dqYxrrKKb6cjr7exTGI+0WQNwQEK0HV/62bImDmparUei 8BZKc9fk41xNYJJxdew81pSAmRK6TMHPOG5cvs8KPLIb/lKfG21wJXL0wDr0U4wy L15riEQlkRckzG2IIV2OB5F+5MY7NWNHubuJ0YEBDJkPMQKfBPSkZM1xkvosiend 8BBgHPBH4HiZ9z/ZvrRXyIjOOpYuko9wyiqtRpqSp4OimB2RMV6VG8oSD+OG3YCj VhF2+KlZwLj9mG9sOeslDuBnp4h4eyCvVoILQNE0qYjeHGY4WTkqP/l29ZI2+rQW cfcOk8atl4ojmekmsLcoz3EnJLtDIgtLtchHTIKsDQgZnVNASnvpaZXU3l8T6fZf 0PitHf90Qj2WWkuiMkNBbS0q4D/CknH7pqy1TY8/IWQRrvPp9deLDEMs+TcSleOk 1HZ1bxgCL1lgqQGiqC66Ybyy794bG6g3CclFkSHGGB8UcC1hkg8= =o96Z -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmQdELgACgkQ7ZfpDmKq fjRyIhAAiuZfMpkCkyrVZycCouQsPeYtUPSeJpbaUHktBWZYxZ7JwCvLEFx9RC1+ Pz3Siiwes7Q0R0yuFCOr11oDfS9br22WOuvSYdaNacdxp8Xas8s5vKwj5ObJcu+a sYyrKMBlEf4nPiwZTXNaX5OW+kNJEFS9A+TS2vJ0Us3JzWrcfucBVnSwDqIkXWO5 99JXfqENH5OtxX5hbrGLCJ6g0A48tFgHWCXWIQ3NyCZQQzylLjQubXZHkcn9VVhP R1eesSskihJrNpUAaTS8eneZeJ9sdT7iulk+cgCI+uTMl+QOFtiEBxtF7Osj1faq xgguz7qIP2h47EIZDsBpKvyyOxL5MDsrGvbu/1zi6QzbBjIXR7UQ1s9OzZy+Zh+r Nxav3vYHXHpayFn7i6/BTEjLak4Jdr526DwyM9OAxiq9Bx4d6LAk3H14OHFKa6i8 6Nbp+4SjhuD+ycjyyU49SIdCYvakXgHHYHSnngXQzp9LO01cG4tHfnFadYN+l6Va iu+HqPBQqbieuKqqtC9Zvx0xSFxUQLnraVTERkaUFPNRPhxiezMStPCCAbAhceAc cXsfbhcrQrvd46L9Lm89+ywkNsrVw9e/j3yWsHTAxhqpyda6v/XRUV9LgqwSUego MKQT5q/XB7Zn7stC6Fj/XHzh4Ty4yLJ65SWjreXV1+C+fqijVA8= =BTwz -----END PGP SIGNATURE-----

1 0

2023a release of tz code and data available
by Paul Eggert March 22, 2023

March 22, 2023

The 2023a release of the tz code and data is available. This release contains the following changes: Briefly: Egypt now uses DST again, from April through October. This year Morocco springs forward April 23, not April 30. Palestine delays the start of DST this year. Much of Greenland still uses DST from 2024 on. America/Yellowknife now links to America/Edmonton. tzselect can now use current time to help infer timezone. The code now defaults to C99 or later. Fix use of C23 attributes. Changes to future timestamps Starting in 2023, Egypt will observe DST from April's last Friday through October's last Thursday. (Thanks to Ahmad ElDardiry.) Assume the transition times are 00:00 and 24:00, respectively. In 2023 Morocco's spring-forward transition after Ramadan will occur April 23, not April 30. (Thanks to Milamber.) Adjust predictions for future years accordingly. This affects predictions for 2023, 2031, 2038, and later years. This year Palestine will delay its spring forward from March 25 to April 29 due to Ramadan. (Thanks to Heba Hamad.) Make guesses for future Ramadans too. Much of Greenland, represented by America/Nuuk, will continue to observe DST using European Union rules. When combined with Greenland's decision not to change the clocks in fall 2023, America/Nuuk therefore changes from -03/-02 to -02/-01 effective 2023-10-29 at 01:00 UTC. (Thanks to Thomas M. Steenholdt.) This change from 2022g doesn't affect timestamps until 2024-03-30, and doesn't affect tm_isdst until 2023-03-25. Changes to past timestamps America/Yellowknife has changed from a Zone to a backward compatibility Link, as it no longer differs from America/Edmonton since 1970. (Thanks to Almaz Mingaleev.) This affects some pre-1948 timestamps. The old data are now in 'backzone'. Changes to past time zone abbreviations When observing Moscow time, Europe/Kirov and Europe/Volgograd now use the abbreviations MSK/MSD instead of numeric abbreviations, for consistency with other timezones observing Moscow time. Changes to code You can now tell tzselect local time, to simplify later choices. Select the 'time' option in its first prompt. You can now compile with -DTZNAME_MAXIMUM=N to limit time zone abbreviations to N bytes (default 255). The reference runtime library now rejects POSIX-style TZ strings that contain longer abbreviations, treating them as UTC. Previously the limit was platform dependent and abbreviations were silently truncated to 16 bytes even when the limit was greater than 16. The code by default is now designed for C99 or later. To build in a C89 environment, compile with -DPORT_TO_C89. To support C89 callers of the tzcode library, compile with -DSUPPORT_C89. The two new macros are transitional aids planned to be removed in a future version, when C99 or later will be required. The code now builds again on pre-C99 platforms, if you compile with -DPORT_TO_C89. This fixes a bug introduced in 2022f. On C23-compatible platforms tzcode no longer uses syntax like 'static [[noreturn]] void usage(void);'. Instead, it uses '[[noreturn]] static void usage(void);' as strict C23 requires. (Problem reported by Houge Langley.) The code's functions now constrain their arguments with the C 'restrict' keyword consistently with their documentation. This may allow future optimizations. zdump again builds standalone with ckdadd and without setenv, fixing a bug introduced in 2022g. (Problem reported by panic.) leapseconds.awk can now process a leap seconds file that never expires; this might be useful if leap seconds are discontinued. Changes to commentary tz-link.html has a new section "Coordinating with governments and distributors". (Thanks to Neil Fuller for some of the text.) To improve tzselect diagnostics, zone1970.tab's comments column is now limited to countries that have multiple timezones. Note that leap seconds are planned to be discontinued by 2035. Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2023a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2023a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2023a.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit f24b84a13556c12441dd55c323f9a8fd3b6fbbee dated 2023-03-22 12:39:33 -0700 and tagged '2023a' in the development GitHub repository at <https://github.com/eggert/tz>. 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2022g release of tz code and data available
by Paul Eggert Nov. 29, 2022

Nov. 29, 2022

The 2022g release of the tz code and data is available. This release contains the following changes: 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.) Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2022g.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2022g.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2022g.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit 4e604e41115182c3ab1185bab4c888822511348e dated 2022-11-29 08:58:31 -0800 and tagged '2022g' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 5188edd8d05238a88da734cf78fadfb57640d4db3e7a0a9dddd70e3071e16b6eebc2e2ab17109b7dafafae68abfbc857df481cfdc3ffe63f7eb1569ea0b5997a tzcode2022g.tar.gz 7f79394295e00e3a24ebdbf9af3bc454a65f432a93b517e7e96c7f9db9949f6f5fdae9892a9d3789ff44ae0eb1bfe4744d36976b4624659af951d26414f94e65 tzdata2022g.tar.gz f471046189f519de5735ac2d8c3edb27cbe925247b06f44634e700e5e4453ec5f715d85256fc74d300bcdaa070a7600fcc054327f2dfe743ab3c0fe404ff83c1 tzdb-2022g.tar.lz Here are the GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmOGOvAACgkQ7ZfpDmKq fjSI4w/+PkVPCILI34+QeXIm6LLPhEPLxtb7q3rvfoBXk/qyottcPJvQXSAsqX/c Hus6lCNK0COyICVn48rf3ss+GNxLev/ZTMVLUBkH8WrgSe+5lPDjmaZjkbzIGPs8 L9TqE60K8DyeLNnZPf4Pkpx6o5r7uO3iQSN5qFyj5H82mDJ4vcQLZSNvDIA4+sRm +qmsBcn6Gk3EU3u3/YrxhuEY0ymUrJvm5LSG62CqLwA1Pd+REF70Ir5LdO4yJoUS blWe/CLUcnRfzMEK9/NGa1z3GtkisPYBCPnYJ93m2n4ASvFQ+R3t7NCEY2W+96ce 3kSPIX5W2g0/gcDTi1bxdLnQkO4RxtSQnlCjCae58dQNUgOa2X8mdRniRjjYC059 JY35VUzmX9wCPpcuq0iMbpOEWXeWga0ZDRmlZtZCwPKxkw+AhoJQVp5jxGNa4kwZ CZDjQga3ObvN8aQqMi9TpabJ4m2ZdN1yHQ7OTN80N67tHYMAbW0aY3J0JRIVjTHo P+8Y6FaCLzJA73BgnR7faiILXIPtXE54X+koo8x2Uwtrl8/wHsaPTippq96ts6Y6 3Zdr3EAQgAPhYtUgtHoIbLFBLjmyL5sUXOTwG/gMkUYXVkDpeBnc+BHrkv0Sjaw7 Vzz5HthhnSblP9bLB3KPTbbM0t+aypsSOYOSZWnIK8ANI9BdrNQ= =tSyt -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmOGOvAACgkQ7ZfpDmKq fjSedhAAu8XkzqB8NmXDYfEurBCUPe7zCBxBe7yqdt5W+tDA9snOtab3d8Oq7Lsb vNZfh4qHIxNbEYpoXOc0Qce3XKXGgyKDmZeFYQJ0ziqoZXetNLQEmg7T/H2m3GHl eo7K3w2hvyBB26FuDtimE5pzuJo9qJLXDp2SbOAbKa1w5HibyvZBOfcQozZ4CBmE mBc8LzyFY3zOhiy7CGYskqOzatNa0Eid95RkK2RXXTnN965N1qdyOz3z9SkJFH9h MR84VGYBmk0UGdPGmp1imkGmIrO/8AFny19ECCe4F74o2DFSPzANOaEh+i3fIP3d GNR96la9GGopmna+VNQt6zxdw4DHRoNkAupnJ2NVM0lbAMOG0mmwCFkCzW4gzTVm 7NdAtZyH+HjiKYPdQNIHbsvl0K1qIo1yXrb4jTd8eXaxA65msCOOwjqWk7a8ZjrJ NrLNmGeLow9svofEAeLpc9BUgwF90JGIlb+tPYovyj/xSU9vhQl1ZEmFYYdaN781 rGZ5jKtwBZWoAxW1Copf8S3jcxleSVMFo6MTEU+K+svZLd8SH5BnETa0fYWSTzKA uh2Y4V6pFe0/JVVC15mYkytbP6TC6prRmi44jRHtVRDtizGd7FFxYacIApkhBVi2 Qb8Qy+oZySwL+dbRlu+bA9nHIdACtxRouVEWpAecCBLaK3kBb7I= =6g+2 -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmOGOvIACgkQ7ZfpDmKq fjT6/A/5AQdjRCEQngohVPQcxWE57FhHN+3Yq72iCbi64MhnL8sR+fHcni8CRb4f SIxi/tXeLdKJVV8+w7TBeQIDBDHrWXla2NSTHNcGREdp/wMoWagxBzAx3g2qQ7eT Qz6JhG4pHlOGK3u0/RESuCnhS/XmKTYj6BeDNc33LQ4iB0Lh+o9O/rz6jQyO3Y3L 84QMNJ4Edq/pOz9d9T1/cWO1j8Cn4Mled9WdCyOqZnhzRcJdbi/gDydC5aJIj1Fx 5OUrRwblIRVxMbK+kZA4D0lHR56KZb7NsaFGfsnW0m5zHUpXoGNYaFelKlWoRblO OEneM34IgNxsLhe9J9r/epSWB/14PmaY0zdXlNmKqELa7zYiJkiAwucPWtpxkPJG q6WPt4Pk4bWcud9esdgG7vjBz3ffrz2hUrmSMxuwLPHLuPRLrBoeMAmecFixGpea BUmR+XCPV9m19zcnvshBFGuLTNwFZSWBlUB9lWIocXc9cIMo4W/gNdUhnjb9L0+z VtAJzws1VcRV5zpkanwt+K50xjUlunxcRgLbLY2oMCpeDQyxH6DTnUr8RdJeMmvM ZPJYekxG0W8/eEjDOUFIQqvOtK1sQVhCZhjeciDW7to/K1p7DJy+g5g7lJn5KK4B Oz8vqmhdvdoIAK5uezPILpyJT7UpdUhmZ1WwQRqhk6G3jXPigQc= =Kyhr -----END PGP SIGNATURE-----

1 0

2022f release of tz code and data available
by Paul Eggert Oct. 28, 2022

Oct. 28, 2022

The 2022f release of the tz code and data is available. This release contains the following changes. The most urgent one is the change for Chihuahua, Mexico which affects timestamps starting Sunday. Briefly: Mexico will no longer observe DST except near the US border. Chihuahua moves to year-round -06 on 2022-10-30. Fiji no longer observes DST. Move links to 'backward'. In vanguard form, GMT is now a Zone and Etc/GMT a link. zic now supports links to links, and vanguard form uses this. Simplify four Ontario zones. Fix a Y2438 bug when reading TZif data. Enable 64-bit time_t on 32-bit glibc platforms. Omit large-file support when no longer needed. In C code, use some C23 features if available. Remove no-longer-needed workaround for Qt bug 53071. 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. On 2022-10-30 at 02:00 the Mexican state of Chihuahua moves 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. Changes to data Move links to 'backward' to ease and simplify link maintenance. This affects generated data only if you use 'make BACKWARD='. GMT is now a Zone and Etc/GMT a link instead of vice versa, as GMT is needed for leap second support whereas Etc/GMT is not. However, this change exposes a bug in TZUpdater 2.3.2 so it is present only in vanguard form for now. Vanguard form now uses links to links, as zic now supports this. Changes to past timestamps Simplify four Ontario zones, as most of the post-1970 differences seem to have been imaginary. (Problem reported by Chris Walton.) Move America/Nipigon, America/Rainy_River, and America/Thunder_Bay to 'backzone'; backward-compatibility links still work, albeit with some different timestamps before November 2005. Changes to code zic now supports links to links regardless of input line order. For example, if Australia/Sydney is a Zone, the lines Link Australia/Canberra Australia/ACT Link Australia/Sydney Australia/Canberra now work correctly, even though the shell commands ln Australia/Canberra Australia/ACT ln Australia/Sydney Australia/Canberra would fail because the first command attempts to use a link Australia/Canberra that does not exist until after the second command is executed. Previously, zic had unspecified behavior if a Link line's target was another link, and zic often misbehaved if a Link line's target was a later Link line. Fix line number in zic's diagnostic for a link to a link. Fix a bug that caused localtime to mishandle timestamps starting in the year 2438 when reading data generated by 'zic -b fat' when distant-future DST transitions occur at times given in standard time or in UT, not the usual case of local time. This occurs when the corresponding .zi Rule lines specify DST transitions with TO columns of 'max' and AT columns that end in 's' or 'u'. The number 2438 comes from the 32-bit limit in the year 2038, plus the 400-year Gregorian cycle. (Problem reported by Bradley White.) On glibc 2.34 and later, which optionally supports 64-bit time_t on platforms like x86 where time_t was traditionally 32 bits, default time_t to 64 instead of 32 bits. This lets functions like localtime support timestamps after the year 2038, and fixes year-2038 problems in zic when accessing files dated after 2038. To continue to limit time_t to 32 bits on these platforms, use "make CFLAGS='-D_TIME_BITS=32'". In C code, do not enable large-file support on platforms like AIX and macOS that no longer need it now that tzcode does not use off_t or related functions like 'stat'. Large-file support is still enabled by default on GNU/Linux, as it is needed for 64-bit time_t support. In C code, prefer C23 keywords to pre-C23 macros for alignof, bool, false, and true. Also, use the following C23 features if available: __has_include, unreachable. zic no longer works around Qt bug 53071, as the relevant Qt releases have been out of support since 2019. This change affects only fat TZif files, as thin files never had the workaround. zdump no longer modifies the environ vector when compiled on platforms lacking tm_zone or when compiled with -DUSE_LTZ=0. This avoid undefined behavior on POSIX platforms. Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2022f.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2022f.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2022f.tar.lz The following convenience links are also available, although they may point to the previous release until the relevant caches are refreshed: https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz Links are also available via plain HTTP, and via FTP from ftp://ftp.iana.org/tz/releases with the same basenames as above. Each release file has a GPG signature, which can be retrieved by appending ".asc" to the above URLs. Copies of these signatures are appended to this message. This release corresponds to commit d3dc2a9d65ce433555c994ce2cf84901b87d9357 dated 2022-10-28 18:04:57 -0700 and tagged '2022f' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 3e2ef91b972f1872e3e8da9eae9d1c4638bfdb32600f164484edd7147be45a116db80443cd5ae61b5c34f8b841e4362f4beefd957633f6cc9b7def543ed6752b tzcode2022f.tar.gz 72d05d05be999075cdf57b896c0f4238b1b862d4d0ed92cc611736592a4ada14d47bd7f0fc8be39e7938a7f5940a903c8af41e87859482bcfab787d889d429f6 tzdata2022f.tar.gz 1dd9f8fc3e9fa113a72010b9bceb04c7540b1175801fbd15b591a6bca9400503c6683a4c89f83e08d77f5b78624a005113a8fc428c552a2a4a2b8d26de110141 tzdb-2022f.tar.lz Here are the GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmNcfQQACgkQ7ZfpDmKq fjS19A//fGB4YH/GygGQkql4tlshrg7ykQIQCc3qDgBrj09JVeUfM/tAN5unx+lU jBK/V5BK4K9bkrNCmxmhEdoCfdyKqusPLJSrI+ZwqqPXzNOt46dkzUxbRNYH2pvy SZklxSpgJPa4h83I8C3afGOVJn6DYpnv8SKOV6jdOOk8C6aXMaDA6t16BxN1i1Ja UKN9EQtC7xjtvtq7LtLcwo9GMy4pWoyb+CbDayG2wBq4ym3VFLxRbKupVFIDa0I7 +1pzM3Ldg2dwDKvLH8GRzirsisXbfESNVI3v1DmGnm0xDrK5pOT3iPe95OyqvMvL NdjQCpbYpoaUuo8nCf5clU4nzGEDb1sEkI6Mb8tGl2ZgG5gdC5a4P2i20vNmyIt/ uSquD7xmcBZ0CggijpFx0ndZ+0y7XSJNf7mCPaxc7vHCj5jAgQv8HLE6UXChCLeq OazZOW7xEYTDyWQ9xt2HIY1RMVBeaEE5n9V3xyfBQpb/jYeIFm83nEP5X+KjlG0Z 0YGYrVieiwS1lzNTh+LXcXusMwe6B6wYt1G4pVUgasoFADUemfd9y0yzvpdkz6/2 +WvIAF4KbGwdVHteKFR+wq9UyaSFhTUL1f9f+DsYnSbApO4F7KFzDZ3tA9IVLxfy WuOZkqjAtldzkQhoTiygF2cyGwgzWeT1WwNF6oowYYvisDf1o2E= =JtyS -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmNcfQUACgkQ7ZfpDmKq fjRcIBAAhzux6C0XSQtma/RyLPGu18XmXNrFOATZ+pGxZVYEMQCbIwzS5K9yN1eD NqmcyRwI+57Kn4WHIaPcAXepcWq20yv9W30CNAZLmI6bgDlY2x2Hy+N+/TZfGWbQ FKa0gDKh/KMV5efOsgRQDm4RnM81yoJT7CV6abnaAnvUGtOzBlnsnCD5CbEUPA2s RsM/DnHISjofgfRuEyJk1oce/lji4VOaKnoR1u5omUHhOsowAZZs9AVS3dJcYdSc 58QPrwFoZjDtW5SpXV8lufgJBFEaWpDBzgvqwKyZz4SuRmezZLWedhu06iCLNedB ORkL9N5UJj2IXUD46uJGSaFgRyqtAElEzqWjgPsa2HjrTFoDlUfu2+I7HTzE+9ZN JldGwJz3P0ZGYUXldiCsV0dIgVsukcXE+8y2t3XSreTrgY+BQkipCaFz/y9vgMN+ ueudjvcTyTx9K6SCWeZ9UHLGhIPMsTgifmrTi/4Z2O8HHPROtYAF1aAMqKO0qMZ+ YEJnwsyHWDxty+3eB6NXRuvZjAIK3nTf1KUOy5zh4h0oG1/NG19eCNtzLLC3Zpt8 KLXrDPqWU2KRs3ts6l1kYTgiebb0w5iUBksMgTxwcslqYFHQfX++lov0PZOv1Mtl D46ODcN9NAHxsu+MmX9PtAotMVCyyJhhv6sFHnbqzEiA+faHVXw= =E16s -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmNcfQYACgkQ7ZfpDmKq fjT9mA/8CUb7Mz5G+ih1x9HkhqMFE4W8m9C0yQfDL4s3c50HcLIUfjyue0UUejW5 t6Ahs+nkFWXd9l2d0Twp/tRuSMJSuiNkcxcL12zAFD2PmP1gjmvObup56jNlOSut RzuCjhDCcNablZUCFnPJ7RtZ3CDfB4wQlp86QsELFhRyhOEIpp+dtPbJ6rRQctMt 8E3Bdk5CvmMrtosTWMRJRDP6e3ox1Dx1idUSFwTedHaxwpFw7edVyuS6rV5i7i3G hX+9osS1fxV7uLJ7dEd78Hlg55ygn2l5iaxyl7bEWnBpRjGjeuYzir34Y7ddWoKh 2feE4z1aG8zIzXJMCnojqiyFO4Thsm1naWKwBLzIx0L3y09NOtRAL/9HYbO4f0Zi /owClbYLQSjzqaVLxFfSscFt9iIwonmQsynG3/aJuNAHQVEXhAWg5dlaEqG0pCLo mKsvg8aeu5sC68bokEZbsGzcPnmQYFTnhU9ZXYvEIrCbBUuszv7FdlSsB6Jwwhqn dadNZF5mToxUSp6YfmwTY/STvf6WJOxMuU2bxF4Bi79xptY8mO2tEre/wamwId95 Vk0aNyFD8z9PJu8Sfk5cPijJXLcGI6MEXoZlJ9Ou9l/Ybio9Ns4YH7tjHf8O10Uu 9QM3XMKKyAG2G49mYbU1lJDmcM1VGtGmS/CibmL/d1eZdNFTBqw= =Eezp -----END PGP SIGNATURE-----

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