However, in response to the bug, Apple released an official statement on their support site, stating that they will not release a bug fix as "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."
Apple will not release a "Do Not Disturb" bug fix because...
On 1st January 2013, users on iOS6 realised that their phones failed to come out of "Do Not Disturb" mode even after their stated time. This was later confirmed by Apple that it was a bug found in iOS6. Our previous article covered on this issue. http://www.thetechrevolutionist.com/2013/01/ios-do-not-disturb-mode-fails
However, in response to the bug, Apple released an official statement on their support site, stating that they will not release a bug fix as "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."