davein2it: Tmu HTC desire is showing timeline of +13 gmt. Disappointing when wife's iPhone is without hitch.

Not all iPhones were glitch-free apparently:

Hundreds of iPhone users were woken up an extra hour early this morning after a glitch with the device’s alarm clock – despite the clock adjusting itself automatically.
To make matters worse, some users reported they then tried to outsmart the device by setting the alarm an hour later, only to have it go off at the correct time, causing mass confusion.

Also here.