Go to setting (Gear Icon at the top, can scroll let right)

more settings (next to General)

system (scroll down)

Date & Time

Turn Off / Remove Checkmark on the automatic Date & time and Time zone 

Then select the time zone which gives the right time.

If time is still changing, set Time zone to the other time zone with same GMT time.  

Can scroll down to System , then Date & Time

Turn off - Automatic Date & Time

if leave option off - unit may set Time to China time if On

Choose a time zone with the same GMT # as your Location for example

California - GMT is 8

New York - GMT is 5