On 5/28/20 3:41 AM, EL MAAYATI Afaf wrote:

we need to know if there is a procedure to notify IANA (TZ Coordination) officially, from a governmental source, with the official dates of TZ changes in Morocco.

The procedure is to send email to tz@iana.org with official citations, preferably with pointers to copies in English since the mailing list is in English. For best results, give one years' notice before the dates of change. For more details, please see: https://data.iana.org/time-zones/tz-link.html#changes