Apple’s iOS 6 “Do Not Disturb” feature ran into a few bugs over the weekend after we moved in to 2013. For reasons unknown, the feature would not automatically turn itself on or off. Apple released an update on Wednesday acknowledging the problem:
After January 1st, 2013, Do Not Disturb mode stays on past its scheduled end time.
Do Not Disturb scheduling feature will resume normal functionality after January 7, 2013. Before this date, you should manually turn the Do Not Disturb feature on or off.
To turn off the scheduling feature, tap Settings > Notifications > Do Not Disturb and switch Scheduled to Off.
We presume the fix will roll out in a quick over-the-air update.