Those who rely on their iPhone alarms found that as we moved into 2011 their alarms were no longer working. Apple acknowledged the bug on Sunday and said that the problem would only be evident on January 1 & 2, and that it wouldn't affect any days after that. Also, it only affected one-time appointments, not repeating alarms. You can read more about it in the New York Times. Update: PocketNow says that it doesn't affect everyone, and that it continues to be a problem for some.