May 2023 - tz - lists.iana.org

Time Zone Database
by EL MAAYATI Afaf July 8, 2026

July 8, 2026

Dear Paul, I'm Afaf EL MAAYATI from National Telecommunications Regulatory Agency in Morocco. Actually, in the current version of Time Zone Database (https://www.iana.org/time-zones) for Africa region, and especially for Morocco, it’s mentionned that a program will be running to implement the transition dates. According to this program, the next transition dates (during 2023) are as below : - March 19, 2023 (switching to GMT). - April 30, 2023 (switching back to GMT+1). In fact, we will switch back to GMT+1, advancing 60 minutes, on Sunday, April 23 at 2:00 a.m (not on April 30). Please refer to the official annoncement, published by the Ministry of Digital Transition and Administration Reform: https://www.mmsp.gov.ma/fr/actualites/passage-%C3%A0-l%E2%80%99heure-gmt-%C… So, would you please update the program, in order to consider « April 23 at 2:00 a.m » (for switching back to GMT+1). Thank you in advance for your feedback and for your habitual support. Thank you. Best Regards, Afaf EL MAAYATI National Telecommunications Regulatory Agency Morocco [https://www.anrt.ma/images/ANRT-Signature.jpg] ________________________________ Ce message, son contenu et toutes les pièces jointes sont adressés à l'attention exclusive de leur (s) destinataire (s) et sont strictement confidentiels : ils relèvent de la correspondance privée. Toute publication, utilisation ou diffusion, même partielle, par des personnes autres que les destinataires est interdite et doit être autorisée par l'Agence Nationale de Règlementation des Télécommunications (ANRT, Royaume du Maroc). Si vous recevez ce message par erreur, nous vous prions de le détruire après en avoir informé son expéditeur sans délai. L’ANRT décline toute responsabilité pour toute altération, déformation ou falsification subi par le message et ses pièces jointes au cours de leur transmission. Retrouvez toutes les informations de l’ANRT sur son site Web à l’adresse suivante : http://www.anrt.ma. ________________________________ This message, its content and its attachments are intended for the exclusive use of the named addressee (s) and are strictly confidential. Any copy or other use of this information by persons or entities other than the intended recipient is prohibited and should be authorized by the National Agency of Telecommunications Regulation (ANRT, Morocco). If you have received this communication in error, please delete the material and notify the sender. The ANRT accepts no liability for any alteration, distortion or falsification that may occur during the transmission of this message. All information about ANRT can be found on our website at the following address http://www.anrt.ma. ________________________________ إن هذه الرسالة ومحتواها ومرفقاتها موجهة خصيصا للشخص المرسل إليه وتعتبر سرية وتصنف ضمن خانة المراسلات ذات طبيعة شخصية. ويمنع منعا كليا نشر أو استعمال أو بث، ولو بطريقة جزئية، لهذه الرسالة من طرف أشخاص غير المرسل إليهم ما لم يتم الترخيص بذلك من طرف الوكالة الوطنية لتقنين المواصلات (المملكة المغربية. في حالة ما إذا توصلتم هذه الرسالة عن طريق الخطأ، يرجى منكم العمل على إتلافها فورا بعد إخبار الشخص المرسل إليه بذلك. ولا تتحمل الوكالة الوطنية لتقنين المواصلات أي مسؤولية عن أي تحريف أو تغيير أو تزييف قد يلحق بمحتوى الرسالة أو بمرفقاتها خلال عملية الإرسال. للمزيد من المعلومات، يرجى الاطلاع على الموقع الإلكتروني للوكالة الوطنية لتقنين المواصلات : http://www.anrt.ma.

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(no subject)
by Cool Gab19 Nov. 8, 2024

Nov. 8, 2024

can you add Philippine Daylight Time on your Database I think it was missing from the list of the time zones please reply immediately if solved thanks...

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Re: [tz] Time for a Lunar time zone? -Brooks
by Paul Eggert July 11, 2024

July 11, 2024

On 3/2/23 09:51, Brooks Harris wrote: > Will we need DST on the Moon? :-) I hope not! The Moon's axis tilts only 1.5°, much less than the 23.5° of Earth's axis, so seasonal effects on sunlight duration are much less intense on the Moon and there should be less need for Earth-like DST. A more pressing issue is that the length of day (including daytime and nighttime) varies more on the Moon. Local Earth days vary by at most 0.008 hours from the mean of 24 hours (this variation is due to the eccentricity of the Earth orbit and the obliquity of the ecliptic). So people who think that every local Earth day is exactly 24 hours are not far off. Local lunar days, in contrast, are roughly 29.5 ± 0.25 Earth days (again, this includes both lunar daytime and lunar nighttime). That's more slop to deal with, relatively speaking, and dealing with varying-length days could be a bit of a problem for civil time on the Moon. Presumably ESA's boffins are on top of this.....

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Did Greenland abolish daylight saving from 2024 on?
by Paul Eggert Nov. 20, 2023

Nov. 20, 2023

This week several English-language news sources reported that Greenland has moved its clocks forward for the last time. These reports disagree with current TZDB[1], which follows Thomas M. Steenholdt's December email[2] saying that although in November Greenlanders voted to not fall back this fall, they also voted to continue to observe daylight saving time (DST) next year, effectively moving their time zone one hour east instead of abolishing DST. There's no disagreement about timekeeping this year. The first point of disagreement is March 30, 2024 at 23:00, when TZDB says Nuuk, Greenland will spring forward to 24:00, whereas the recent news reports say clocks will neither spring forward nor fall back during 2024. So who's right: Steenholdt in December, or these several recent news reports? Currently TZDB goes with Steenholdt. After all, he cited the relevant Greenland legislation and his email address ends in ".gl". I suppose another possibility, though, is that Greenland's government has changed its mind since November. However, if so I'd like to see citations to the newer legislation. The earliest recent news story I found on this topic was a week ago by Lebawit Lily Girma[3], senior travel news reporter for Bloomberg Pursuits. I'm taking the liberty of bcc'ing Girma to see if she can help get to the bottom of the situation. [1]: https://iana.org/tz [2]: https://mm.icann.org/pipermail/tz/2022-December/032402.html [3]: Girma LL. Greenland Solves the Daylight Saving Time Debate. Bloomberg. 2023-03-24. https://www.bloomberg.com/news/articles/2023-03-24/greenland-keeps-daylight… Here are some of the other news reports I found. Greenland to stay in daylight saving time forever. AP. 2023-03-27. https://apnews.com/article/greenland-daylight-saving-summertime-utc-gmt-3b5… Martin M. Greenland is keeping daylight saving time permanently. NPR. 2023-03-28. https://www.wunc.org/2023-03-28/greenland-is-keeping-daylight-saving-time-p… Selcho M. Here’s why Greenland is permanently keeping daylight saving time. Deseret News. 2023-03-28. https://www.deseret.com/u-s-world/2023/3/28/23660379/why-greenland-keeping-… Jerusalem Post staff. Greenland changed their clocks to daylight savings for the last time. Jerusalem Post. 2023-03-29. https://www.jpost.com/international/article-735751 Carpineti A. Greenland Has Changed Its Clocks For The Last Time, Embracing Daylight Savings Forever. IFLScience. 2023-03-29. https://www.iflscience.com/greenland-has-changed-its-clocks-for-the-last-ti…

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Danish standard time will probably officially be based on UTC
by Jonas Nyrup Sept. 9, 2023

Sept. 9, 2023

Since 1893-03-29 Danish standard time has been defined as "the mean solar time for the 15th degree of longitude east of Greenwich" (machine translated of the offical law). With the introduction of UTC we didn't update that law, but we did start using UTC+1 as standard time in practice. So for around 50 years maybe only astronomers have been following the law. The Minister of Transportation has now proposed a bill to update the law to define Danish standard time as UTC+1 to keep up with reality. At the first reading all political parties expressed their support and jokingly noted that "it was about time". The updated law is expected to take effect on 2023-03-26. The current law: https://www.retsinformation.dk/eli/lta/1893/83 The bill: https://www.ft.dk/samling/20222/lovforslag/l19/index.htm Tom Scott on the subject: https://www.youtube.com/watch?v=yRz-Dl60Lfc Jonas Nyrup

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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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