Its unclear what causes Apples operating system to crash from changing the date.
However, there are a number of theories behind why this is actually an issue.
In other time zones, setting the clock will result in a positive time value.
Best guess is that this is triggered by having the time value less than zero.
Not even a simple DFU mode restore via iTunes can rectify the issue.
But your mileage might vary.
So, it is safe to say that there doesnt appear to be a confirmed fix for this problem.
The only fix for victims of the bug is to pay a visit to their local Apple store.
This isnt the first clock-related bug to cause problems for the iPhone.
Several bugs over the years have shut off or delayed alarms.
Apple declined to comment on the issue.
source: www.techworm.net
