Beginning at 10:00 EDT (2:00PM UTC) on May 14th, 2016,
bugzilla.mozilla.org will be down for maintenance for up to 3 hours. We will be converting all DB timestamps to UTC for easier replication with AWS, and other benefits. After the migration is complete, you should not notice a difference as the UI will still display dates/times as PDT by default. As before, you can set the your timezone to something other than PDT using the Preferences page.
Bug 232193 - bmo's systems (webheads, database, etc) should use UTC natively for o/s timezone and date storage
https://bugzilla.mozilla.org/show_bug.cgi?id=232193
Please let us know (file bugs) if you see any issues after the migration.
Thanks
BMO Team