The reason has not been given but the glitch appears to affect single alarm settings on the iPhone 4 and earlier models with software updates.
A similar problem hit the iPhone alarm when the clocks went back in November, again causing many users to be late for work or for transport arrangements.
"We're aware of an issue related to non-repeating alarms set for January 1 or 2," Apple spokeswoman Natalie Harrison said in a statement quoted by Macworld.
"Customers can set recurring alarms for those dates and all alarms will work properly beginning January 3."
iFAIL: iPhone alarm suffers from Y2K11 bug
Posted on Sunday, January 02 2011 @ 21:03 CET by Thomas De Maesschalck