There will be an outage of the 'fedora-packages' service starting at 2015-01-21
18:00 UTC, which will last approximately 4 hours.
To convert UTC to your local time, take a look at
date -d '2015-01-21 18:00'
Reason for outage:
The xapian database for Fedora Packages has gotten out of sync and the only
way we have to right it at the moment is to rebuild it entirely. See
Fedora Packages - https://apps.fedoraproject.org/packages