My system time changed every time

My system time changed after some time provide me solution

The problem seems to be that your battery on your mother board is going bad.
No big deal, it's a small battery (used to be what was in watches and things)
Just ask someone to help you open your computer up and switch out that little battery.
I suggest someone with a little background information on computers so you don't break anything.

Cheers!

does it always change by a specific number ? Eg: shifts time by +/- 30 minutes or 1 Hr etc.. Else if its shifting at random, then its confirmed as CMOS battery issue.