It looks like the clock can get reset to 1/1/1970, although quite how a 3 year old can do this beats me. The suggestion is that he had an iPad that had been jailbroken and had then had a software update applied, which might have caused this. Quickest way to solve it is to use Find My Phone and erase the iPad (if you have FMP enabled) or follow the 'usual' steps for a complete restore via iTunes (hold down x and x button, release one button and then intone weird incantation and prayers to Steve Jobs etc.).
Biting the hand that feeds IT
