> 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.
[iOS 6: Do Not Disturb mode stays on after scheduled time](http://support.apple.com/kb/TS4510)