May 2026 - 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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B.C. Permanent Daylight Savings
by Matthew Lee July 2, 2026

July 2, 2026

Hello, will this database be updating for B.C. switching permanently to Daylight Savings Time? Thank you.

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Alberta to follow British Columbia?
by Roozbeh Pournader June 12, 2026

June 12, 2026

I just ran into this: https://calgaryherald.com/opinion/columnists/bell-alberta-daylight-time-yea…

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Nunavut explores ending time changes
by bellaire＠tk.com June 2, 2026

June 2, 2026

I am watching for news related to Cambridge Bay officially changing to UTC-06 to match the new time zone in Alberta. It appears Nunavut is ready to reconsider time zones across their entire territory. Justice Minister George Hickes provided the update Tuesday in the legislative assembly in response to a question from Kugluktuk MLA Simon Kuliktana. “As recently as earlier this month, my officials from Justice have been in communication with other counterparts in Northwest Territories to discuss this matter. So yes, it is something that’s in front of me,” Hickes said. . . . Nunavut’s three time zones add “complexity” to the issue, Hickes said, adding there would be public consultation before any changes are made and new legislation would be required for implementation. https://nunatsiaq.com/stories/article/nunavut-explores-ending-time-changes/ The full discussion can be read starting on page 11 (PDF page 17) of the Nunavut Hansard for May 26th. https://www.assembly.nu.ca/sites/default/files/2026-05/20260526_Blues_Engli…

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New Apple time zone data for Canada?
by Paul Eggert June 1, 2026

June 1, 2026

Gary Ng reported[1] that on Tuesday he got a notification on his Apple TV that updated time zone information was available, and that this was because Apple pushed out an over-the-air time zone update for Canadian users due to recent provincial legislation in BC and Alberta. I'm skeptical at least about the "Alberta" part, since the Alberta changes are not yet official. Does anyone have definitive information about this? The only public repository I found for Apple[2] is currently based on TZDB 2025b, which is so old that it doesn't have the official changes for British Columbia, much less the not-yet-official changes for Alberta. I would guess the updates Ng reported are newer than 2025b. Another possibility is that Apple's changes for Canada are about interfacing to cell phone service providers, which are presumably having their own issues with time zones. [1]: Ng G. Apple Sends Overnight Time Zone Fix to Canadian iPhones. Here’s Why. iPhone in Canada. 2026-05-27. <https://www.iphoneincanada.ca/2026/05/27/apple-iphone-time-zone-update-cana…> [2]: https://github.com/apple-oss-distributions/TimeZoneData/commits/main/

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Nunavut explores ending time changes
by James Bellaire June 1, 2026

June 1, 2026

I am watching for news related to Cambridge Bay officially changing to UTC-06 to match the new time zone in Alberta. It appears Nunavut is ready to reconsider time zones across their entire territory. Justice Minister George Hickes provided the update Tuesday in the legislative assembly in response to a question from Kugluktuk MLA Simon Kuliktana. “As recently as earlier this month, my officials from Justice have been in communication with other counterparts in Northwest Territories to discuss this matter. So yes, it is something that’s in front of me,” Hickes said. . . . Nunavut’s three time zones add “complexity” to the issue, Hickes said, adding there would be public consultation before any changes are made and new legislation would be required for implementation. https://nunatsiaq.com/stories/article/nunavut-explores-ending-time-changes/

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[PROPOSED] Stop using -Wstrict-overflow
by Paul Eggert May 28, 2026

May 28, 2026

* Makefile (GCC_DEBUG_FLAGS): Remove -Wstrict-overflow, as it is deprecated and slated to be removed in GCC 17. Issue reported by Drea Pinski in: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101913#c6 --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 3428e8fd..98c19b93 100644 --- a/Makefile +++ b/Makefile @@ -383,7 +383,7 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 \ -Wmissing-variable-declarations -Wnested-externs \ -Wnull-dereference \ -Wold-style-definition -Woverlength-strings -Wpointer-arith \ - -Wshadow -Wshift-overflow=2 -Wstrict-overflow \ + -Wshadow -Wshift-overflow=2 \ -Wstrict-prototypes -Wstringop-overflow=4 \ -Wsuggest-attribute=cold \ -Wsuggest-attribute=const -Wsuggest-attribute=format \ -- 2.54.0

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KDS Calendar and projection-based time systems — question for TZ coordinators
by Dragan Škondrić May 27, 2026

May 27, 2026

Dear TZ Coordinators and list members, My name is Dragan Škondrić. I am an independent researcher and the author of *KDS Calendar Version 3.0*, a canon-first calendar-time specification. I am writing with a conceptual and architectural question, not with a request to change the IANA Time Zone Database. The core idea of KDS is that existing civil, legal, metrological, and software time systems — including UTC, Gregorian dates, local time zones, DST rules, ISO 8601 renderings, and TZDB-based local-time projections — may remain as projection-facing systems, while a separate canonical layer preserves invariant event identity. In short: *KDS proposes a canonical event-identity layer above projection-based time systems.* Under this framing, time zones and civil-time rules are not treated as errors or obsolete mechanisms. They remain essential projection systems for human, legal, and operational use. However, they are not treated as the primary identity of a preserved event. The event would instead carry a canonical identity, edition information, annual phase, canonical coordinates, source metadata, and projection profile information, so that different projections can be generated without collapsing the event identity into any one local-time rendering. I am aware that TZDB already solves a very different and highly practical problem: maintaining historical and current civil-time rule data for real-world locations. KDS is not proposed as a replacement for that work. My question is narrower: Does the distinction between *canonical event identity* and *civil/time-zone projection* seem technically meaningful from the perspective of people who maintain or use TZDB? A related question is whether there are existing terms, prior discussions, or known models in the time-zone / civil-time community that already address this separation between: 1. the identity of an event, 2. the instant or time scale used for ordering, 3. the local civil-time rendering, 4. and the future replay of that event under changing time-zone or calendar rules. The specification is archived on Zenodo: *KDS Calendar - Version 3.0* DOI: *10.5281/zenodo.20067725* At this stage I am not asking for endorsement, adoption, or any change to TZDB. I would simply appreciate any technical comments on whether this framing is meaningful, already covered by existing practice, or conceptually misplaced from the viewpoint of the TZDB community. Kind regards, *Dragan Škondrić*

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Missing record Madeira Island DST
by Stefanie Schlosser May 26, 2026

May 26, 2026

Dear IANA team, For personal reasons, I've been trying to find out about DST on Madeira Island, Portugal during the past century. Long story short. I've researched a lot and along the way I've been told that even IANA is actually missing some records for when Madeira Island was congruent in its time changes with mainland Portugal (Lisbon) and when it did its own thing. I've eventually found the original law text for Madeira Island from 1982 and am hereby submitting it to you. You don't have any mistake in your tzdb, but seemingly part of it is based on the assumption that Madeira did not apply DST under certain years, and you didn't have prove of it. Here comes the prove. :) With best regards, Stefanie Schlosser

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US permanent DST to make its way into transportation funding bill
by Tim Parenti May 22, 2026

May 22, 2026

Many on this list will remember the *Sunshine Protection Act of 2021* passing the US Senate in March 2022 by unanimous consent in uncharacteristically swift fashion: https://lists.iana.org/hyperkitty/list/tz@iana.org/thread/GRBDSXXXWM4XXNERF… Following near-immediate blowback from a few senators — including Senator Tom Cotton of Arkansas, who says his staff had not properly flagged it for his opposition — the effort ultimately stalled in the House. When sponsors of functionally identical legislation in the current Congress similarly attempted to fast-track it in October 2025, Cotton blocked the effort. https://thehill.com/homenews/nexstar_media_wire/5581335-effort-to-fast-trac… *The Hill* now reports this week that the legislation is receiving a full markup by the House Energy and Commerce Committee, and will be rolled into the *Motor Vehicle Modernization Act*, a larger transportation funding package. https://thehill.com/homenews/house/5886117-daylight-saving-time-house-repub… https://thehill.com/policy/5889199-permanent-daylight-saving-time-legislati… https://thehill.com/homenews/administration/5890568-trump-praises-daylight-… President Donald Trump, who last year admitted to press that DST reform is a "50/50 issue" which "it's hard to get excited about", praised the committee's vote on Thursday, calling it "a very nice win for the Republican Party" and saying he is "going to work very hard" to see the act signed into law. https://truthsocial.com/@realDonaldTrump/posts/116615022975327653 If adopted as-is, states that do not join Arizona and Hawaii in opting for the existing "standard time" exemption prior to the new law taking effect would automatically be placed into "permanent daylight time". The text does not currently carry any delay provision, nor does it allow for states to opt in or out of DST after it is adopted. https://www.congress.gov/bill/119th-congress/house-bill/139/text https://www.congress.gov/bill/119th-congress/house-bill/7389/text -- Tim Parenti

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