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August 2022

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2022c release of tz code and data available
by Paul Eggert Aug. 15, 2022

Aug. 15, 2022

The 2022c release of the tz code and data is available. This release reflects the following changes, which do not affect timestamps unless your system has the awk bug mentioned below: Briefly: Work around awk bug in FreeBSD, macOS, etc. Improve tzselect on intercontinental Zones. Changes to code Work around a bug in onetrueawk that broke commands like 'make traditional_tarballs' on FreeBSD, macOS, etc. (Problem reported by Deborah Goldsmith.) Add code to tzselect that uses experimental structured comments in zone1970.tab to clarify whether Zones like Africa/Abidjan and Europe/Istanbul cross continent or ocean boundaries. (Inspired by a problem reported by Peter Krefting.) Fix bug with 'zic -d /a/b/c' when /a is unwritable but the directory /a/b already exists. Remove zoneinfo2tdf.pl, as it was unused and triggered false malware alarms on some email servers. Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2022c.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2022c.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2022c.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 ce4d77644d2793027bb27f095dec7b530edcd947 dated 2022-08-15 17:47:18 -0700 and tagged '2022c' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 3373fa16a12007415c3dc3a75c4a0d61d6ae54968eeecedcdf4bcfd7f554020a15c4687dde107b90462b75d848eebe1e200c33322ebe0d3f1ad11bc769cade06 tzcode2022c.tar.gz e2ae92abac6d87ce4ab4ba9012e868e1791b842e083293489debc0c671b9cf135b5b70426dacb6dbebbf6eba24463205225ae45bb7df891a086b25475f85ee0b tzdata2022c.tar.gz e51a9044da116a52906bc0fc22a3dde0e1a6d4e486f9e610a63aa6634ccc1ebd0bc2d47d2faa84bde2b78cc890fe3fb08f6c1ac4e1e0c147d45de5c21d26b26a tzdb-2022c.tar.lz Here are the GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmL66eQACgkQ7ZfpDmKq fjSarBAAp6iKJluMo3MOD4YQUwB5aUsVg1zSXPYs1WH88gXaHLxm2G0fv8Ar4FFg gDOBxyazc/4fB7zwec3rMKo5KVV/pRil1go93BetefoU1ffhrLYbrVw89/VsesXP nQ5FXkVLd/u5vuOXf2WoS+hmJANlC2ljhHTN1MX0hoChyLA/paBYvS18mTn45Tm4 PCH6cPKX//gwGSmOavRqlT9wp95NCpCeXX7Yl5aYIgpdGAJAGZJrzGcn1Rp0NoOJ BQfoaC4SuGEeBbqsUdoFrXE6V1rI1pAvPXq8fwTjrh7LDIaGmIHY+HAeJUDwT4d5 rEXNJ9D5mun4VDkVMiyMlITTletu1wnHyspLZk4h9g6H75C2c0pipCI4FGfEn+wh 2l54bVAwJE2An5UKdqukaC2B9MGxEFTbgE5Za93OwOyrb6FFGUrMjj2Ua1nf1h6E 5VefqyKepF1TY/ApWy2OObTioBew2lVuXRsQrD1cDo/rqAyMYLlkrye0nQspvkAA jv5LKH8fmapBee7JaFYYbnCMZwpyr0iP4LOiH34a9vsFrUtERUTUKxhPv1epNyyc F6ECJz7wknYwRszyp/2ai7nc8yCHc+76dmgXM6fPwcghuVv0ihl7uOkNx1Rp2MHr oZ7r0KV7HcAOQgCWJuh4l1QNX3qX7XqmRJP1rNCmMbUnENme6MQ= =7xd7 -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmL66eQACgkQ7ZfpDmKq fjTHhQ//YaTZjsHEvJuVFRcqjuIByGySv7aUnvldFGZ4vuAgIX0g7hlaoCdSlVri qjqhGSM7ShcRs1PtvBGUmFrrfvhg+vW6D6etkf3GO8h/Vztz26GIkY/PLv/wFu4i bf915wfbsMmaoI/MVlLsNMzQ63qS5i+JwouJAKOmUb95wNMrmKlBi4XXcQNvUdTF pp7uGq7jJdcETAgH5UQkeiXBghahdS6SEK8raFplW2hK8SqyAAjG9hRBjMqyoSUS cPK0UwrjLZvd9KOB73RFryglkNpTthqvsr4vZ7K4WzZuIYxHLzG2LEG6Rhuuq8Z/ 2u3g4KMLJ29NQJRIjAYWU9F2IruzgQJjxRjMtbxysR7Jiru+xzg5nha1eRdp/G4z F9aqc2NR79I9kpUQAIxhi3C6v/mreMNm0HfBskA3Ws1R7Mi7MSpnIhi/gwUUnQV2 AMBOo2qAz24d3kt65Opc2bHWZemtfzXTkMQhIiIgCkHrb5H9EKUYac+aJeJpRZKU jdZ/5rLzKJyUraBb1a0h6UXCuxk0yVelVIcDEjaJTfpgMF5qmwrFaCBZUZ0zbQvT 9VhltgpkWGGUMJxn+OTyGsZRO8oUXg/3SbaMQr0tAnR59tcorvhF5wU5aNH/PYoa dDwW+qmDW3ky10DiF2fzjZWwRBiiLJF61stHXaNy9RvHC/V3yFY= =nylY -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmL66eYACgkQ7ZfpDmKq fjS8Dg//fnZzYIPMv90un2mPyAnVZbVSS6O8CG2YSdHPkXwVZE8DbyrIVNaJTLNG zaGgQ0/+enf3HZlM8NTBJO6Zf4Sv1ZFrnifqF0JmUZ5P/OxlhKLdt3OgQ0oGAX48 SacJoXf3JX8At10Ar+NVtAneJpG1wVsD4nPFrNS/rWRwfMMKdnP2HxlEVHCbNikk r1/F+065qbXYOhYD3UpqJI9dKaA3OFjEANQJJHw3+h7m0YZFcMATSw5anrnvGotx +lgQffLQvKIKc5E7CsppEk0SnFmKncUceepajJzqnyNTT9kecSAlu6qrnJCgHtu+ qhQfMfklixqocCwj6yJyZDKuv9e8vKjb7U2HYhNRhBWS3eE4ozE6fDDacehRyUrz HLgotpRuYWImP3MA+AhOqSQThY2y3tSOHAKxMDixaq4dkpXGgg+5KR/VRLD8//99 m19yu3QqpzjKGPiQpfdU5tpk/2JegFpCbYwsMkw0XfCVvmRwjKGexS3hIHLF4WkQ XMjkf8Bj+AS0Ld+9IBE97BrG6qDN+NPI9EhC7/YvyxqcDcSWbG65JbiYkyDUkBgt rUFPTlUUTD2hcdfbQQZ4f23F/iJpbJXOyhqxxHl9RnkJkEkgDcO+apps74V4IN/6 YSP3pvW32hZ0Z8iXKD4VVbYBqIw6rLb8HpaA5zQEHs/S2A/kcfs= =BW2X -----END PGP SIGNATURE----- PS. If your tzdata parser does not yet support negative DST offsets or times past 24:00, or if it insists on a 'pacificnew' file that is no longer present, this release's data entries can be turned into a rearguard-format tarball that should work even with these older parsers. This is intended to be a temporary transition aid for these parsers. To generate a rearguard-format tarball, obtain the full distribution as described above, and run the command 'make DATAFORM=rearguard tailored_tarballs' on a development host. Or you can run 'make rearguard.zi' to generate a single file that can be fed directly to a parser that works like 'zic'.

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2022b release of tz code and data available
by Paul Eggert Aug. 10, 2022

Aug. 10, 2022

The 2022b release of the tz code and data is available. This release reflects the following changes: Briefly: Chile's DST is delayed by a week in September 2022. Iran no longer observes DST after 2022. Rename Europe/Kiev to Europe/Kyiv. New zic -R option Vanguard form now uses %z. Finish moving duplicate-since-1970 zones to 'backzone'. New build option PACKRATLIST New tailored_tarballs target, replacing rearguard_tarballs Changes to future timestamps Chile's 2022 DST start is delayed from September 4 to September 11. (Thanks to Juan Correa.) Iran plans to stop observing DST permanently, after it falls back on 2022-09-21. (Thanks to Ali Mirjamali.) Changes to past timestamps Finish moving to 'backzone' the location-based zones whose timestamps since 1970 are duplicates; adjust links accordingly. This change ordinarily affects only pre-1970 timestamps, and with the new PACKRATLIST option it does not affect any timestamps. In this round the affected zones are Antarctica/Vostok, Asia/Brunei, Asia/Kuala_Lumpur, Atlantic/Reykjavik, Europe/Amsterdam, Europe/Copenhagen, Europe/Luxembourg, Europe/Monaco, Europe/Oslo, Europe/Stockholm, Indian/Christmas, Indian/Cocos, Indian/Kerguelen, Indian/Mahe, Indian/Reunion, Pacific/Chuuk, Pacific/Funafuti, Pacific/Majuro, Pacific/Pohnpei, Pacific/Wake and Pacific/Wallis, and the affected links are Arctic/Longyearbyen, Atlantic/Jan_Mayen, Iceland, Pacific/Ponape, Pacific/Truk, and Pacific/Yap. From fall 1994 through fall 1995, Shanks wrote that Crimea's DST transitions were at 02:00 standard time, not at 00:00. (Thanks to Michael Deckers.) Iran adopted standard time in 1935, not 1946. In 1977 it observed DST from 03-21 23:00 to 10-20 24:00; its 1978 transitions were on 03-24 and 08-05, not 03-20 and 10-20; and its spring 1979 transition was on 05-27, not 03-21. (Thanks to Roozbeh Pournader and Francis Santoni.) Chile's observance of -04 from 1946-08-29 through 1947-03-31 was considered DST, not standard time. Santiago and environs had moved their clocks back to rejoin the rest of mainland Chile; put this change at the end of 1946-08-28. (Thanks to Michael Deckers.) Some old, small clock transitions have been removed, as people at the time did not change their clocks. This affects Asia/Hong_Kong in 1904, Asia/Ho_Chi_Minh in 1906, and Europe/Dublin in 1880. Changes to zone name Rename Europe/Kiev to Europe/Kyiv, as "Kyiv" is more common in English now. Spelling of other names in Ukraine has not yet demonstrably changed in common English practice so for now these names retain old spellings, as in other countries (e.g., Europe/Prague not "Praha", and Europe/Sofia not "Sofiya"). Changes to code zic has a new option '-R @N' to output explicit transitions < N. (Need suggested by Almaz Mingaleev.) 'zic -r @N' no longer outputs bad data when N < first transition. (Problem introduced in 2021d and reported by Peter Krefting.) zic now checks its input for NUL bytes and unterminated lines, and now supports input line lengths up to 2048 (not 512) bytes. gmtime and related code now use the abbreviation "UTC" not "GMT". POSIX is being revised to require this. When tzset and related functions set vestigial static variables like tzname, they now prefer specified timestamps to unspecified ones. (Problem reported by Almaz Mingaleev.) zic no longer complains "can't determine time zone abbreviation to use just after until time" when a transition to a new standard time occurs simultanously with the first DST fallback transition. Changes to build procedure Source data in vanguard form now uses the %z notation, introduced in release 2015f. For example, for America/Sao_Paulo vanguard form contains the zone continuation line "-3:00 Brazil %z", which is simpler and more reliable than the line "-3:00 Brazil -03/-02" used in main and rearguard forms. The plan is for the main form to use %z eventually; in the meantime maintainers of zi parsers are encouraged to test the parsers on vanguard.zi. The Makefile has a new PACKRATLIST option to select a subset of 'backzone'. For example, 'make PACKRATDATA=backzone PACKRATLIST=zone.tab' now generates TZif files identical to those of the global-tz project. The Makefile has a new tailored_tarballs target for generating special-purpose tarballs. It generalizes and replaces the rearguard_tarballs target and related targets and macros, which are now obsolescent. 'make install' now defaults LOCALTIME to Factory not GMT, which means the default abbreviation is now "-00" not "GMT". Remove the posix_packrat target, marked obsolescent in 2016a. Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2022b.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2022b.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2022b.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 b61a7acb4d267872f1c5319f30889a927b441b8f dated 2022-08-10 15:38:32 -0700 and tagged '2022b' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 851622eb8e6dc8f8201bf05e1f7e411ca32b2ed0f4dc9f6b875f4482c05c4a3302259b78c3e8e2dadda52ae19d4d34ffa3463fee10f70fa3a8b08b19f1417f79 tzcode2022b.tar.gz a51418cda50386bc2e82a26201178c282ec225e04867e70a47ef90f42371a4014c70bffebb52ac09ccd893dfa17b0acc782f31527b3579ebdc4a302a9367ddb1 tzdata2022b.tar.gz b5bd93401c9586047e865a49b9f7fd0bdf451973be24a433786633f41a1ecc2f7eacdeb78d9a906c3526bfd3b236edab72682e5bc09add42156f8dcc2497694a tzdb-2022b.tar.lz Here are the GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmL0NEoACgkQ7ZfpDmKq fjTVbw/8Cu33QgaVXIWhyQDv9gFBtGJvgVNa7IL1FP9nz1O6unqjTr57i7sameO0 aTu/v7JiCgIg5fsqqsi5yJQnYn8mZDC4MbOlqBtE237p4BwEZbvii0UWuWo/N4ep KNpbd3ezgOCYYXA+VS4azIW1LRAHhB4ZOvoUZuoRkPfoA5bR1VfZ8NRh0SfVK17R hoeRU7nlDofxHapL5zAqikGROLHhS++PVQ+x0gi5lQmDdHLtXZeiKor/y6sqb8R3 cQt8RyM6GzA9t4rsoUnMGBZIwaLYADJAmxVpBgS1EEwVfL7nx5WLur2ui+BK2GoF nN2QUG/N9TRPPFK722PiFAqoULKWamgUmRFl302TtIbygdaaKd7fxPMmgTL22REw 6qbVamP6Gk6jpG7+/FHusHB1Vz4TiTbSwK0g5UpTrps7QpoCXIU8sbScUXZzPYiY 1V2e9Fnrd2QE2+83guQhY4OX156Z32SPixl+qfK8+MMykibU6PGvCxhwHa7BzYBo X38rmsCri8vo+P27/godd6RBfsAkb8/PtB3Hlo0OGmhyggUMruVB+poip/xK8zJA bbjFB9pwi+gzkXVEkHIMuh5wgXswO+Tko7/P4ZH1t5xocc3BlrSxDvQuAVGb3hZw H3oyG5KP7sX4HCvZ42+3QTX05hFcJFgFtoncEVWAj+fPMJUm/yc= =IUf2 -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmL0NEoACgkQ7ZfpDmKq fjSfew/+P1NUMCiqlH5FlO5YyVGjc3Gxmpb6ToKsFloI7pn4KGlgQFy224VFmCVn ImSlurAuKydmZI6r+JPnjYIx0hcFUK/Wi2Y9tJKMlPDuOrexLa2toDvoXMlhBgQk RH+iaIGk8FC2mP/tdif0pzr43a87zRQiPuJ3MdoXYxEARXmc6wNtk07RS5jMlBUS G8dF2h023pTP3fD04Q77q+wUg3k5UuLw3DWrCCci1oeW/Vp+NzOsMb4vcxaWiH0M ecF0+FMpmqehJdKYZsS29D3aX8acZp3zXlAKoWHRCasCeKcltVEIyHHqdQrrR1SP R/r/OCOhIuOR3f9viPAAo56Obb63M+0siQYJmFy2Jr00lFjAzRIeajrCxSU7vxW7 6ljfdtSK8Ruv9FKrYD1Rdqa6jCpZLs6lnLk54WBStvdzJawjhZibBu3hK9LIagr/ Hb2x3H87swfId8lUZK46kjYhRYU7Jijtu+fPms5Fhrauaj2Dq56DrPyI+LyGKqBz Os0T28QUM6i67Rd0JOoMtDMesx2C/jvy9G09wwDq0mUdqg1OnfWeaUpYwCZJYdo0 Hm+zOPaxXIQph3f/MrFbrmwwggwFdjeCikOAH3uFPDp0UoHrGVq493sIGG3ulPYK 2FErRNNaeAyzniUK/35IqCQBB82GPiw6pxVf/O/HhPjLyUk55lU= =5vEv -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmL0NEsACgkQ7ZfpDmKq fjS9Yw/7BgRppySA/2mXbL+EqkGG1tmelEVx1TaHN/E2a/k1yji38Fs5+e0oHikb 95Xy2vApK5qMF0oye6nnsmtV+JquJSzwaQ4YDGLoPOtwCVNQU6WEOSlL7zfQXFsI AQy9x+yoQzevjiA+MK1Xx/s6a0G50uNZNFN1huRd4ENPPEw6qEEgLLo2qaP75uGz SM/RVIMjSTWdTdsefV1l/fIOPEqtX0S7SuldUbZh19NDLUn6vedwnO4i2qn71Guu EvZOr8RNtRpKeKOuyvLd+mKB1o4s3rUU/HlAAOcwJueNFstYH83QtrLKbjomPalI DC3E0x21Zlu3PoMsiaM+3BQknFBhx9JZI/pZz5+mUGlnjuNWTOcvxG9UGtRH+6Gr hVintjNuL2oabTuStxI7iuy+Dy6xbZ82Hs6Zy5xKuLixds/DutIfJHjLpsA3vaj+ PAkvEmPyF9zZY0C7QM3frMjqFc9vXY1114EKkVDknJ1jcOM1hszASgV/I3+j3NkN U2+++Y0fFWrWeGSm6mI5Pc2Z18OYfoIYS7q+k8fb1gzjiEWFav4U1cdm/npRca27 Mhkbbk4obVNyKGkRqpYQ40h99/Nl6uymMYx8N6zVin3tFXY23PeZnlJ6wS1yxOv1 i1g41pviERYjpp6JjBkosv5aVkxA+WKxqoWaE7x6fPXd1D3giAY= =H4rJ -----END PGP SIGNATURE----- PS. If your tzdata parser does not yet support negative DST offsets or times past 24:00, or if it insists on a 'pacificnew' file that is no longer present, this release's data entries can be turned into a rearguard-format tarball that should work even with these older parsers. This is intended to be a temporary transition aid for these parsers. To generate a rearguard-format tarball, obtain the full distribution as described above, and run the command 'make DATAFORM=rearguard tailored_tarballs' on a development host. Or you can run 'make rearguard.zi' to generate a single file that can be fed directly to a parser that works like 'zic'.

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