Why my phone change date and time by itself?

[Tato Pigg]

I am play candy hills and i notice that my phone settings turn back in to 11/25/14 in 3:00 and i don't know why.I always change my date and time because of this problem and it gets very annoying.My phone is nokia lumia 520,thanks.

 

[FAHMI BASSEM]

Welcome to Windows central, this happens after soft resetting your device, or removing battery for lung period of time.
The best way to fix is by enabling "set date and time automatically".
BTW what version of WP you are running?

 

[Tato Pigg]

I am on windows 8.1 and thank you very much ��.