I couldn’t find this posted here on discussion.fp.o.
The original announcement is here. Since this will affect all Fedora services, please do spread the word.
There will be an outage starting at 2021-03-18 21:00 UTC, which will last approximately 2 days.
To convert UTC to your local time, take a look at http://fedoraproject.org/wiki/Infrastructure/UTCHowto or run:
date -d '2021-03-18 21:00UTC'
Reason for outage: Replacement of FAS2 with the new fedora account system
Affected Services: All Fedora Services
Please join #fedora-admin or #fedora-noc on irc.freenode.net or add comments to the ticket for this outage above.