Server : Time Zone change log.
When we change the system time zone,
It would be logged in System Log:
Event id 1:
Source : Kernel-General.
The system time has changed to 2017-03-30T07:02:56.704492900Z from 2017-03-30T07:02:56.704492900Z.
Change Reason: System time adjusted to the new time zone.
The New time and the Old time are the same in the details which will not help much to know from which timezone it had been changed from .