Hi Paul,

Thanks for the patch.

Official source:

https://www.mmsp.gov.ma/fr/actualites/passage-%C3%A0-l%E2%80%99heure-gmt-%C3%A0-partir-du-dimanche-19-mars-2023

Google translate:

Changeover To GMT Time From Sunday March 19, 2023

March 14, 2023

On the occasion of the holy month of Ramadan, Morocco will switch to GMT time from Sunday March 19, 2023 at 03:00 a.m., delaying legal time (GMT+1) by 60 minutes, in accordance with the article 2 of decree n° 2.18.855 published on 16 Safar 1440 (October 26, 2018), relating to legal time and the decree of the Head of Government n° 03.17.23 published on 13 Chaâbane 1444 (06 March 2023) , modifying the legal time of the Kingdom.

Noting that the return to Kingdom legal time (GMT +1) will take place on Sunday April 23, 2023 at 02:00, after Ramadan.

Regards,

Le mar. 14 mars 2023, 23:20, Paul Eggert <eggert@cs.ucla.edu> a écrit :

On 3/14/23 14:46, Milamber via tz wrote:
> Currently, I don't find any official government publication on Internet
> of this press release but I suppose that the press media have received
> by traditional way.

Thanks for the info. Proposed patch attached.

We'll need a new tzdb release soon. We're already planning to do so for
Egypt anyway so we'll get at least two for the price of one.

If you find an official government publication, please let us know so
that we can cite a more-authoritative source.