[tz] Time Zone Database

EL MAAYATI Afaf afaf at anrt.ma
Wed Mar 22 12:47:42 UTC 2023


Dear Paul,



  Thank you for your prompt feedback.



Please let us know once the fix for 2023 issue is implemented.



Best Regards,



Afaf EL MAAYATI

National Telecommunications Regulatory Agency

Morocco



-----Message d'origine-----
De : Paul Eggert <eggert at cs.ucla.edu>
Envoyé : jeudi 16 mars 2023 19:07
À : EL MAAYATI Afaf <afaf at anrt.ma>
Cc : Naela Sarras <naela.sarras at icann.org>; kim.davies at icann.org; ma <ma at anrt.ma>; Time Zone Mailing List <tz at iana.org>
Objet : Re: Time Zone Database



On 3/16/23 01:26, EL MAAYATI Afaf wrote:



> (https://www.iana.org/time-zones <https://www.iana.org/time-zones>),

> for Africa region, and especially for Morocco, it’s mentioned that a

> program will be running to implement the transition dates.



Yes, I wrote that program to guess what Moroccan authorities will do in the future. Unfortunately, I don't know how to predict what Moroccan authorities will do, atop the underlying well-known uncertainty about when Ramadan will occur.



The program I wrote was conservative: when it wasn't absolutely sure that Ramadan would end by a certain time, it delayed the spring-forward transition by another week. This year Moroccan authorities did not delay similarly - i.e., they were less conservative than I was. Possibly this is because their astronomical calculations are more precise than mine, so that they can afford to be more aggressive in their predictions.



I worked around the 2023 problem by using a more-aggressive calculation as described here:



https://mm.icann.org/pipermail/tz/2023-March/032709.html



and this fix should be in the next tzdb release, which should be published soon.



This patch affects spring-forward predictions for 2023, 2031, 2038, 2046, etc. However, it's likely that in the future the tzdb tables will need to be corrected again, as Moroccan authorities' calculation method evidently differs from the one published in tzdb.



If someone could let us know exactly how the Moroccan authorities calculate DST start and end time, we could presumably fix the tzdb calculations to match. This should avoid the need for last-minute corrections and so would make Morocco's clocks more reliable.

[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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mm.icann.org/pipermail/tz/attachments/20230322/8ca25c79/attachment-0001.html>


More information about the tz mailing list