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Daylight saving in Iran changed
by Shahab Ouraie March 17, 2022

March 17, 2022

Hello. As new rule approved by government, the daylight saving time in Iran/Tehran (which was +4:30) will no longer be applied and the whole year time will be +3:30 Please consider updating this which will take effect in 4 days from now (2022 March 21st).

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[tz-announce] 2022a release of tz code and data available
by Paul Eggert via tz-announce March 17, 2022

March 17, 2022

The 2022a release of the tz code and data is available. This release reflects the following changes: Briefly: Palestine will spring forward on 2022-03-27, not -03-26. zdump -v now outputs better failure indications. Bug fixes for code that reads corrupted TZif data. Changes to future timestamps Palestine will spring forward on 2022-03-27, not 2022-03-26. (Thanks to Heba Hamad.) Predict future transitions for first Sunday >= March 25. Additionally, predict fallbacks to be the first Friday on or after October 23, not October's last Friday, to be more consistent with recent practice. The first differing fallback prediction is on 2025-10-24, not 2025-10-31. Changes to past timestamps From 1992 through spring 1996, Ukraine's DST transitions were at 02:00 standard time, not at 01:00 UTC. (Thanks to Alois Treindl.) Chile's Santiago Mean Time and its LMT precursor have been adjusted eastward by 1 second to align with past and present law. Changes to commentary Add several references for Chile's 1946/1947 transitions, some of which only affected portions of the country. Changes to code Fix bug when mktime gets confused by truncated TZif files with unspecified local time. (Problem reported by Almaz Mingaleev.) Fix bug when 32-bit time_t code reads malformed 64-bit TZif data. (Problem reported by Christos Zoulas.) When reading a version 2 or later TZif file, the TZif reader now validates the version 1 header and data block only enough to skip over them, as recommended by RFC 8536 section 4. Also, the TZif reader no longer mistakenly attempts to parse a version 1 TZIf file header as a TZ string. zdump -v now outputs "(localtime failed)" and "(gmtime failed)" when local time and UT cannot be determined for a timestamp. Changes to build procedure Distribution tarballs now use standard POSIX.1-1988 ustar format instead of GNU format. Although the formats are almost identical for these tarballs, ustar headers' magic fields contain "ustar" instead of "ustar ", and their version fields contain "00" instead of " ". The two formats are planned to diverge more significantly for tzdb releases after 2242-03-16 12:56:31 UTC, when the ustar format becomes obsolete and the tarballs switch to pax format, an extension of ustar. For details about these formats, please see "pax - portable archive interchange", IEEE Std 1003.1-2017, <https://pubs.opengroup.org/onlinepubs/9699919799/utilities/pax.html#tag_20_…>. Here are links to the release files: https://www.iana.org/time-zones/repository/releases/tzcode2022a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdata2022a.tar.gz https://www.iana.org/time-zones/repository/releases/tzdb-2022a.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 95ecc37d29c2f5cf711af43b0ef3a35fc2847aa1 dated 2022-03-15 23:02:01 -0700 and tagged '2022a' in the development GitHub repository at <https://github.com/eggert/tz>. Here are the SHA-512 checksums for the release files: 3f047a6f414ae3df4a3d6bb9b39a1790833d191ae48e6320ab9438cd326dc455475186a02c44e4cde96b48101ab000880919b1e0e8092aed7254443ed2c831ed tzcode2022a.tar.gz 542e4559beac8fd8c4af7d08d816fd12cfe7ffcb6f20bba4ff1c20eba717749ef96e5cf599b2fe03b5b8469c0467f8cb1c893008160da281055a123dd9e810d9 tzdata2022a.tar.gz ece0b7a9ad3d365f8605e8f98a8a78b7fdbbb8aa615b585f21256d9401c59845fcdc951f5fc876293f1b7956b1a2d3fa2baf85099d637a91d4199ee30cf4307e tzdb-2022a.tar.lz Here are the GPG digital signatures for the release files: -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmIxfhAACgkQ7ZfpDmKq fjRXfw/8DC6daRCaFirmN6821H+CA0D/e0Iod9e2g/Z5/yyx5HGCEAfRBhJ6ThWA O1I8oCuwp2kaP2ZH87+HKXT1WXGMx/819FU5fqY2TNncHAUxVUSmAm1yVHWaY2nU qFt3gDTx4vDV0lfSDtKYJJdVeE+VcAdSDUDnYIqMNCKuTkKdTfPVparsAPIZ8egr EC4IBiGolLoLkMiiwvvPNg0J505I+DUYeHEuo+ezhgBzBiLNhCWDfCcghoDYakHr CEH+aq6BVhhn/3w1203ExN7iEr/5iTwC/PjRZoJlBqDS7eAhycgFYHjglHGYSs8P RVNnkTAhDMxONZH97QqKlOo56a5QLMvTDNbBLdX0b4K4lmEfCRe03MbH4ybDkA9S +eYfkeX2kUYKnHTT3XXTiVvjDFGemu+l8QGlJoF9Qu44cUGLPZQZEq/YzbZUw8ax RaT4V0ZkH3+yMYAAWaoa85xXs7a/MnE7Gl9glSFzlijC6iZoRmrXy2ra44TzvwWr E/7Het1lctaiKWcdYH5+vYyzzWZTt4hKAXsCUgBGQy0/mE2KoHRQHk6zfZPY1TvD ib6Dkh9LWYrXsNGCe1H4SpjKEX51Nb27FgIw1DNrbOJpTna5/OKmceu5IIlGJseF nfwPHZ3ATpVfVwdiRqbNC9GNVBev9n5UI67zGQ2494kknR2JMhs= =4JUm -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmIxfhAACgkQ7ZfpDmKq fjTlWw/7BrBTwRx7HvTlNaIbCaj/uOIEomJafNOq8Kdbx2JXrZu8qhj/0vMdwIzQ CEIqVuGKD8WJB4nsBYlFU8Jn1JfRbglnWK1f7yRY1EaXuIFh+FMbRYEk8O3HYPy2 14QCJNjsCwIzztmiuxXqET2eQRpT2iojGKhZbToJE4DpC/w5xCPrUqAIsK8nfC3u TZC8l09zL/xTSl/QMStH/Kh8oJD4uftVMxYZE5zakZaH5M017gwjDdM/7I/D4MME sTm7XEL7IdzzZyTxzeVVbXfyqoEb1ueJJImYnQfGgCnoJKtMjVROzL6BBJSZLkZN tR7/V9mHZKoItzhOv5gwfk0YMy8792rAioqfMUG/KvrvCTNy3PqrE1jO1/nv+FPS WWuixsnRx1Xz2COb88pKnYX17Zt8rBIumcfpgolsBvLKGI7ZLEAekjteKubgpebn jnf6CLAdcRoIdauG483LG/OQ6M9PEUBYTrX56Q8/C3kdOPuuMJ/6qd6k7lNt/fWx O2lBg+lkIagZu8j5pU5mHOsVe2P1f7p7oIt1NF2oAD2cIq6EFWOdcOCyvgC69xE1 +jt6lIQkIfBM8dfxf70z9KZQvOr9bwZaCirWNTgIMxrn/n4vvo5HCbYx+P4LSAhH G1UY/x67Swnl0p6+69d8Ww/SrdOP3T30KxjIaQXx5NgjeU2zIEo= =OX/x -----END PGP SIGNATURE----- -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEfjeSqdis99YzvBWI7ZfpDmKqfjQFAmIxfhEACgkQ7ZfpDmKq fjTWBQ//T8ICtN33H3kcz/4P9gWArfgV7huztvWW9KKBkQpWEa9gIlpYi7jx80wF qnAHZCpRedj+CJXqswkG+lIMVLEHjwVT2hdeP5wPV2y5rJ0J9Ssh2i0voSdX000T WED4u/OyR1shKm4VIxdgY6eqaN6Hedc0+Eib/VoIQAzCM2nP3c4IMAWkBKLiCSIZ n6JVI90jRgAnzhRJjiddJRFMBovzKNIxpqGGZYaxaG0O5AYfsItdRte3RCOn/tc+ tsMSJ+iUt8nTonq4P1nUE4zmvx33V7iOJhaj03fdJal0U8Egc/Ib5exsS2KipEjG iknyi8dUQcbNBFnFoN26SAO9/QMpDDE/vOnGGyWySLSwQg/xmy+LwmIZGqVftDeX JrUeRboH/39aDx6kKIrqXeIlG9bNka/6ThOJEZNr+OejDRyFeqgcatpomRkoExRs pPR88cyA0ZsN3PHhi9eXO+Zyk9GBA0o7m7G0ECK2j6w2axPh8/xPQ94zdFRTcd3V 3xC94N42eoNKeWgEmyvNEXdq5hZXhPK/Lu8D0NScbS440ovMJJtcr8Q+/bihHyGG eOCrxVF5KXLOYvptQ/xhUGodzRm8PuZ6DkJoCtW9PQL82LZDSHAi880YgzsdWzzy 6m6g8KmOmTkmQ6vztMyDr04KW2QDxp53q7hdErh0bW0iyvELd7I= =egWc -----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 rearguard_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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Permanent DST in the United States
by Jacob Pratt March 16, 2022

March 16, 2022

The "Sunshine Protection Act" has passed the US Senate with unanimous consent. It now moves on to the House. My reading of the text is that this would mandate permanent DST for the 48 states that currently observe it, with Arizona (sans the Navajo Nation) and Hawaii able to choose. Notably there is no clause that delays implementation, so it looks like it would take effect immediately. This could be problematic if the bill becomes law near or after the November clock change. https://www.congress.gov/bill/117th-congress/senate-bill/623/text Jacob Pratt

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gmtime failed messages for zdump on Windows with latest git code
by Manuela Friedrich March 16, 2022

March 16, 2022

Hello Paul, I noticed that zdump on Windows from the latest git code now produces "localtime failed" and "gmtime failed" messages. Is that expected? Does it also happen on Linux? New behaviour with git code: zdump.exe -v d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan d:\zoneinfo\iana\Africa\Abidjan -9223372036854775808 (gmtime failed) = -9223372036854775808 (localtime failed) d:\zoneinfo\iana\Africa\Abidjan -67768040609740801 (gmtime failed) = -67768040609740801 (localtime failed) d:\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:00:00 -2147481748 UT = -67768040609740800 (localtime failed) d:\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:16:07 -2147481748 UT = -67768040609739833 (localtime failed) d:\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:16:08 -2147481748 UT = Thu Jan 1 00:00:00 -2147481748 LMT isdst=0 gmtoff=-968 d:\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:16:07 1912 UT = Sun Dec 31 23:59:59 1911 LMT isdst=0 gmtoff=-968 d:\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:16:08 1912 UT = Mon Jan 1 00:16:08 1912 GMT isdst=0 gmtoff=0 d:\zoneinfo\iana\Africa\Abidjan Wed Dec 31 23:59:59 2147485547 UT = Wed Dec 31 23:59:59 2147485547 GMT isdst=0 gmtoff=0 d:\zoneinfo\iana\Africa\Abidjan 67768036191676800 (gmtime failed) = 67768036191676800 (localtime failed) d:\zoneinfo\iana\Africa\Abidjan 9223372036854775807 (gmtime failed) = 9223372036854775807 (localtime failed) Output from 2021e zdump.exe -v d:\zoneinfo\iana\Africa\Abidjan d:\zoneinfo\iana\Africa\Abidjan -9223372036854775808 = NULL d:\zoneinfo\iana\Africa\Abidjan -67768040609740801 = NULL d:\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:00:00 -2147481748 UT = NULL d:\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:16:07 -2147481748 UT = NULL d:\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:16:08 -2147481748 UT = Thu Jan 1 00:00:00 -2147481748 LMT isdst=0 gmtoff=-968 d:\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:16:07 1912 UT = Sun Dec 31 23:59:59 1911 LMT isdst=0 gmtoff=-968 d:\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:16:08 1912 UT = Mon Jan 1 00:16:08 1912 GMT isdst=0 gmtoff=0 d:\zoneinfo\iana\Africa\Abidjan Wed Dec 31 23:59:59 2147485547 UT = Wed Dec 31 23:59:59 2147485547 GMT isdst=0 gmtoff=0 d:\zoneinfo\iana\Africa\Abidjan 67768036191676800 = NULL d:\zoneinfo\iana\Africa\Abidjan 9223372036854775807 = NULL Thank you! Regards Manuela Friedrich

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Wouldn't it be simpler if…
by Torsten Louland March 15, 2022

March 15, 2022

https://xkcd.com/1061/

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Daylight Saving: Iran
by MohamadReza Farhadi March 15, 2022

March 15, 2022

Greetings, Today Iranian Parliament approved the cancelation of the Daylight Saving Time practice. The link for the article can be found here: https://www.bbc.com/persian/iran-60734716 Kindest Regards, MohamadReza Farhadi

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Hong Kong listed as UK not China
by Shelley Finerty March 15, 2022

March 15, 2022

Hi there, I was using a tool that allows me to look at people’s birthdate, time and location and noticed that you still have Hong Kong listed as part of the UK with throws off the timezone for their birthdate. I had to choose another city close to Hong Kong to use it correctly. Is this something that can be changed or updated? Or are you keeping it for historical purposes? Is there a way to do both? Thanks for keeping the time so accurately - I appreciate the work you’re doing. Shelley Finerty Canada

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2022a timeline?
by Deborah Goldsmith March 15, 2022

March 15, 2022

Hi, Is there an ETA for the release of (I assume) 2022a with the change for Palestine? Thank you, Deborah Goldsmith

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[PATCH] URL housekeeping
by Paul Eggert March 12, 2022

March 12, 2022

* tz-link.html: Omit no-longer-active projects, and update URLs. Mention "pytz: The Fastest Footgun in the West". --- tz-link.html | 33 ++++++++++++--------------------- 1 file changed, 12 insertions(+), 21 deletions(-) diff --git a/tz-link.html b/tz-link.html index 48724ad..92da48f 100644 --- a/tz-link.html +++ b/tz-link.html @@ -89,7 +89,6 @@ title="Berkeley Software Distribution">BSD</abbr></a>, title="Web Operating System">webOS</abbr></a>, <a href="https://en.wikipedia.org/wiki/IBM_AIX"><abbr title="Advanced Interactive eXecutive">AIX</abbr></a>, -<a href="https://en.wikipedia.org/wiki/BlackBerry_10">BlackBerry 10</a>, <a href="https://www.apple.com/ios"><abbr title="iPhone OS">iOS</abbr></a>, <a href="https://www.apple.com/macos">macOS</a>, @@ -243,18 +242,18 @@ the process by tailoring the generic instructions in the <code><abbr>tz</abbr> README</code> file and installing the latest data yourself. System-specific instructions for installing the latest <code><abbr>tz</abbr></code> data have also been published -for <a href="https://www.ibm.com/developerworks/aix/library/au-aix-olson-time-zone/index…"><abbr>AIX</abbr></a>, +for <a href="https://developer.ibm.com/articles/au-aix-olson-time-zone/"><abbr>AIX</abbr></a>, <a href="https://source.android.com/devices/tech/config/timezone-rules">Android</a>, <a -href="http://userguide.icu-project.org/datetime/timezone"><abbr +href="https://unicode-org.github.io/icu/userguide/datetime/timezone/"><abbr title="International Components for Unicode">ICU</abbr></a>, -<a href="https://developer.ibm.com/javasdk/support/dst/jtzu/"><abbr>IBM</abbr> +<a href="https://www.ibm.com/support/pages/java-sdk-time-zone-update-utility"><abbr>IBM</abbr> JDK</a>, <a href="https://www.joda.org/joda-time/tz_update.html">Joda-Time</a>, <a href="https://dev.mysql.com/doc/refman/en/time-zone-support.html">MySQL</a>, <a href="https://nodatime.org/userguide/tzdb">Noda Time</a>, and <a -href="https://www.oracle.com/java/technologies/javase/tzupdater-readme.html#usage">OpenJDK/Oracle JDK</a>. +href="https://www.oracle.com/java/technologies/javase/tzupdater-readme.html">OpenJDK/Oracle JDK</a>. </p> <p>Sources for the <code><abbr>tz</abbr></code> database are <a href="https://en.wikipedia.org/wiki/UTF-8"><abbr @@ -488,11 +487,6 @@ many of which also support runtimes lacking the <samp>timeZone</samp> option. href="https://github.com/formatjs/date-time-format-timezone"><samp>Intl.DateTimeFormat</samp> timezone polyfill</a> is freely available under a <abbr>BSD</abbr>-style license.</li> -<li><a -href="https://github.com/kshetline/compact-time-zone-generator">CompactTimeZoneGenerator</a> -compiles time zone data into a compact form designed for -JavaScript. It is freely available under a combination of -the <abbr>MIT</abbr> license and the Apache License.</li> <li>The <a href="https://date-fns.org/">date-fns</a> library manipulates timezone-aware timestamps in browsers and in <a href="https://nodejs.org/en/">Node.js</a>. @@ -546,9 +540,9 @@ It is freely available under a <abbr>BSD</abbr>-style license.</li> Definitions for Python</a> compiles <code><abbr>tz</abbr></code> source into <a href="https://www.python.org">Python</a>. It is freely available under a <abbr>BSD</abbr>-style license. -In code that can assume Python 3.9 or later it is superseded by -<a href="#python-zoneinfo"><code>zoneinfo.ZoneInfo</code></a> -and the <a href="#pypi-tzdata"><code>tzdata</code> Python package</a>.</li> +In code that can assume Python 3.6 or later it is largely superseded; see <a +href="https://blog.ganssle.io/articles/2018/03/pytz-fastest-footgun.html">pytz: +The Fastest Footgun in the West</a>.</li> <li><a href="https://tzinfo.github.io">TZInfo – Ruby Timezone Library</a> compiles <code><abbr>tz</abbr></code> source into @@ -610,11 +604,11 @@ is a <abbr>TZif</abbr> file reader written in Perl. It is freely available under the same terms as Perl (dual <abbr>GPL</abbr> and Artistic license).</li> <li>Python has a <a id="python-zoneinfo" -href="https://docs.python.org/3.9/library/zoneinfo.html"><code>zoneinfo.ZoneInfo</code> +href="https://docs.python.org/3/library/zoneinfo.html"><code>zoneinfo.ZoneInfo</code> class</a> that reads <abbr>TZif</abbr> data and creates objects that represent <code><abbr>tzdb</abbr></code> timezones. Python is freely available under the -<a href="https://docs.python.org/3.9/license.html">Python Software Foundation +<a href="https://docs.python.org/3/license.html">Python Software Foundation License</a>. A companion <a id="pypi-tzdata" href="https://pypi.org/">PyPI</a> module <a href="https://pypi.org/project/tzdata/"><code>tzdata</code></a> @@ -641,7 +635,7 @@ available under a <abbr>BSD</abbr>-style license.</li> <li><a href="https://foxclocks.org">FoxClocks</a> is an extension for <a href="https://www.google.com/chrome/">Google Chrome</a> and for <a -href="https://developer.mozilla.org/en-US/docs/Mozilla/Tech/Toolkit_API">Mozilla +href="https://wiki.mozilla.org/Modules/Toolkit">Mozilla Toolkit</a> applications like <a href="https://www.mozilla.org/en-US/firefox/new/">Firefox</a> and <a href="https://www.mozilla.org/en-US/thunderbird/">Thunderbird</a>. @@ -1010,14 +1004,11 @@ specifies a <a href="https://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol"><abbr>DHCP</abbr></a> option for a server to configure a client's time zone and daylight saving settings automatically.</li> -<li><a -href="https://www.cv.nrao.edu/~rfisher/Ephemerides/times.html">Astronomical -Times</a> explains more abstruse astronomical time scales like +<li><a href="https://www.ucolick.org/~sla/leapsecs/timescales.html">Time +Scales</a> describes astronomical time scales like <abbr title="Terrestrial Dynamic Time">TDT</abbr>, <abbr title="Geocentric Coordinate Time">TCG</abbr>, and <abbr title="Barycentric Dynamic Time">TDB</abbr>. -<a href="https://www.ucolick.org/~sla/leapsecs/timescales.html">Time -Scales</a> goes into more detail, particularly for historical variants.</li> <li>The <a href="https://www.iau.org"><abbr title="International Astronomical Union">IAU</abbr></a>'s <a href="http://www.iausofa.org"><abbr -- 2.32.0

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Just :)
by Sergiusz Wolicki March 11, 2022

March 11, 2022

Ryan Reynolds (@VancityReynolds) wysłał/a Tweeta o godz. 3:29 PM on pt., mar 11, 2022: As if making #TheAdamProject hadn’t satisfied enough of my childhood dreams, this happened. (I still loathe Daylight Savings.) https://t.co/9lAjYzjOnW ( https://twitter.com/VancityReynolds/status/1502290590242910208?t=zCwO45RshV… )

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