I started noticing a couple of days ago that my iPhone went stupid. Do Not Disturb does not turn on when scheduled and, if it does, it does not turn off when it is supposed to. This made me miss a couple of phone calls and, more importantly, several text messages (Mr. Apple, why text messages from my favorite contacts do NOT ring when Do Not Disturb is on?). I was a bit puzzled about it until I read this in the news.

From the NY Times:

On the morning of New Year’s Day, a bug affected the Do Not Disturb feature for many iPhone users. Apple designed the feature to block incoming phone calls and alerts for a set duration — from 10 p.m. to 6 a.m., when the user is asleep, for example. But many iPhone users found that it did not turn off after the designated end time.

On Twitter, many were still complaining about the Do Not Disturb bug on Wednesday, except for those who were happy for the extra sleep.

Awkwardly, Apple highlighted the Do Not Disturb feature in a new commercial broadcast this week. It stars Serena and Venus Williams in a table tennis match that would be a shame to disturb.

This isn’t the first time the iPhone has had problems telling time. In 2010, many European iPhone owners complained that a bug in the iPhone alarm clock caused it to go off an hour late because the software did not automatically adjust to daylight saving time. Some iPhones had a similar problem on Jan. 1, 2011.

Trudy Muller, an Apple spokeswoman, pointed to a troubleshooting bulletin that says the Do Not Disturb feature will work properly again after next Monday. Until then, users will have to manually turn the feature on or off themselves.

According to Apple, this bug will get fixed by itself next Monday. We’ll see…

EDIT (1/11/2013): Apple was right, the problem got fixed by itself last Monday.