- tz - lists.iana.org

Iran Time Zone is Incorrect in Your Database
by Mohammad Ahmadian June 2, 2023

June 2, 2023

Hello, Thanks for your service. This year, the Iran government decided to cancel the daylight time zone. So they did not change the time zone to 04:30. It is now 03:30. I updated my tablet via this application to the latest version of your database successfully: https://github.com/meefik/tzupdater But the time zone is wrongly 04:30 again. Please change your database. Let me know what you think and do. Thank you

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Tzdb build issue
by Naveen kumar June 1, 2023

June 1, 2023

Hi Team, I am facing this issue while compiling the tzdata latest version tzdb-2023c.I attached the log for your reference. Thanks, Naveen.

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[PROPOSED] Update tzselect comment
by Paul Eggert June 1, 2023

June 1, 2023

* tzselect.ksh: Update comment, as Oracle has extended the end-of-life date for Solaris 10. --- tzselect.ksh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tzselect.ksh b/tzselect.ksh index 9a91acfc..98774c03 100644 --- a/tzselect.ksh +++ b/tzselect.ksh @@ -21,7 +21,7 @@ REPORT_BUGS_TO=tz(a)iana.org # MirBSD Korn Shell <http://www.mirbsd.org/mksh.htm> # # For portability to Solaris 10 /bin/sh (supported by Oracle through -# January 2024) this script avoids some POSIX features and common +# January 2025) this script avoids some POSIX features and common # extensions, such as $(...) (which works sometimes but not others), # $((...)), ! CMD, ${#ID}, ${ID##PAT}, ${ID%%PAT}, and $10. -- 2.39.2

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[PATCH] Ask for POSIX-conforming ‘make’
by Paul Eggert May 31, 2023

May 31, 2023

* Makefile (.POSIX): New target. I discovered the need for this when I ran ‘make -n’ and GNU Make executed recipe lines containing $(MAKE) even though they had side effects. When run in POSIX mode, GNU Make won’t execute recipe lines unless they begin with ‘+’. POSIX says the behavior of ‘make’ is undefined unless the Makefile’s first non-comment line has a ‘.POSIX’ target. --- Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Makefile b/Makefile index 8017a14e..da3ee259 100644 --- a/Makefile +++ b/Makefile @@ -1,4 +1,6 @@ # Make and install tzdb code and data. +# Request POSIX conformance; this must be the first non-comment line. +.POSIX: # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. -- 2.39.2

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Europe/Tiraspol problem
by Yoshito Umaoka May 19, 2023

May 19, 2023

Dear all, I was looking at some Unicode ICU test failure on Ubuntu related to time zone. ICU utilizes TZ database including backward file. In backward file, Europe/Tiraspol is defined as a link of Europe/Chisinau. So the actual rule is coming from Europe/Chisinau as below (2023c) # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Chisinau 1:55:20 - LMT 1880 1:55 - CMT 1918 Feb 15 # Chisinau MT 1:44:24 - BMT 1931 Jul 24 # Bucharest MT 2:00 Romania EE%sT 1940 Aug 15 2:00 1:00 EEST 1941 Jul 17 1:00 C-Eur CE%sT 1944 Aug 24 3:00 Russia MSK/MSD 1990 May 6 2:00 2:00 Russia EE%sT 1992 2:00 E-Eur EE%sT 1997 # See Romania commentary for the guessed 1997 transition to EU rules. 2:00 Moldova EE%sT I found behavior of Europe/Tiraspol is different on Ubuntu. When I set Europe/Tiraspol as the system time zone, the default offset set to timezone variable becomes -10800 (3 hour ahead of UTC). However, Europe/Chisinau above shows it should be -7200 (2 hour ahead of UTC) at this moment. (POSIX timezone variable should store “standard offset”, not counting daylight adjustment). On Ubuntu, when I set Europe/Tiraspol as system time zone, -10800 is set to timezone variable. However, when I set Europe/Chisinau, it changes to -7200. Then I realized Ubuntu is using backzone file, which contains different rule. In backzone file, Europe/Tiraspol is defined as below (2023c) # Moldova / Transnistria Zone Europe/Tiraspol 1:58:32 - LMT 1880 1:55 - CMT 1918 Feb 15 # Chisinau MT 1:44:24 - BMT 1931 Jul 24 # Bucharest MT 2:00 Romania EE%sT 1940 Aug 15 2:00 1:00 EEST 1941 Jul 17 1:00 C-Eur CE%sT 1944 Aug 24 3:00 Russia MSK/MSD 1991 Mar 31 2:00 2:00 Russia EE%sT 1992 Jan 19 2:00 3:00 Russia MSK/MSD I understand backzone was created for preserving zone definition of some locations which only differs pre-1970 date, and these data might not be reliable. In reality, I think most of TZ database consumer still rely on either backward or backzone for backward compatibility. I think it’s problematic if these two files produce different results today. I guess the zone definition in backzone file might be outdated, and Tiraspol is actually UTC+2/+3. -Yoshito

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Buggy %z behaviour in strftime
by Almaz Mingaleev May 16, 2023

May 16, 2023

Attached code prints "+0000 America/Los_Angeles" both with glibc and with linked ToT strftime implementation. On MacOs it prints "-0800 America/Los_Angeles". Is it a known issue?

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Changes to DST in IR/Tehran timezone
by Jafari Abolfazl May 16, 2023

May 16, 2023

Hello. First of all thanks for maintaining database and second I hav to excuse for my English before hand, cause I am not a native and maybe do some mistakes. Due to goverments choices, starting from 21st March 2023, Iran dismissed DST and now time should stay at +3:30, but due to lack of contacting with official channels, it seems lots of systems still use 2023c tz database and time is +4:30. This problem cause so many problem specially in smartphone that due to lack of automatic time, many application won't work correctly.

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Web sites using recent versions of the tz database
by Sylvia May 10, 2023

May 10, 2023

Dear team, My name is Silvia, I am the webmaster responsible for carta-natal.es. This is an astrology website wich uses the latest version of the TZ database for calculating astral charts with the correct UT hour and date. It includes a section where you can see the timezone details and time changes of each town throughout history: https://carta-natal.es/zona_horaria.php https://carta-natal.es/cambios_horarios.php Of course there could be some (mine/human) error in associating a time zone identifier to each locality. Do you think it would be possible and/or useful to add carta-natal.es to the web sites list at https://carta-natal.es/cambios_horarios.php? Thank you very much. kind regards, Silvia

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More prominent/consistent record of rule change notification date?
by Jan Harris May 8, 2023

May 8, 2023

Greetings I deal with getting the TZ updates rolled out for IBM AIX. As we all know, sometimes IANA is notified in the eleventh hour, and it is not feasible for AIX to deliver fixes in a matter of weeks (or less) Take Egypt, for example. For good reason, IANA did initiate a new build on March 1, as discussed in this thread<https://mm.icann.org/pipermail/tz/2023-March/032683.html>. (Even if they did, it would have been a tight schedule for AIX to have ready mid April.) I certainly appreciate the emphasis on notifications, placed in the IANA article. How Time Zones Are Coordinated<https://www.icann.org/en/blogs/details/how-time-zones-are-coordinated-13-03…> * https://www.icann.org/en/blogs/details/how-time-zones-are-coordinated-13-03… I have incorporated this message in to our AIX TZ documentation. We usually see some attribution to the notification in the NEWS 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. I think it would be helpful if there was a clear record of WHEN IANA is officially notified of TZ changes, so users could understand this is the result of their government changes, and notification processes, it is not a "defect" in how IANA or vendors roll out these updates. I do realize that sometimes “official” notifications seems to be that someone submitted a more formal government reference, instead of a news article. Maybe just an indicator of when the group is provided such official confirmation. Thanks for your consideration! Jan Harris SME: Globalization, Graphics, X11, Desktop, Commands/Auth AIX Development Support Organization - IBM O: Austin, TX 901:3i019 Ph: 1-512-286-5445 Jabber:23635445 E: janhar(a)us.ibm.com <mailto:janhar@us.ibm.com>

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Inconsistencies between backward and backzone
by Benjamin Drung May 4, 2023

May 4, 2023

Hi, building tz with PACKRATDATA=backzone should result in time zones that only differ for dates before 1970. For dates after 1970 they should be identical to not building with PACKRATDATA=backzone (using backzone to create symlinks). But there are four (five if you include Pacific/Enderbury) time zones that has different UTC offset nowadays: * America/Ensenada differs from America/Tijuana * Asia/Kashgar differs from Asia/Urumqi * Atlantic/Jan_Mayen differs from Europe/Berlin * Europe/Tiraspol differs from Europe/Chisinau First investigation indicate that the timezones in backzone did not get the recent updates applied to them. -- Benjamin Drung Debian & Ubuntu Developer

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