Find "date+time"
Slide your finger down the display starting from the top edge of your phone.
Press ALL SETTINGS.
Press ALL SETTINGS.
Press date+time.
Turn on automatic time zone, date and time update
Press the indicator next to "Set automatically" until the function is turned on.
If you want to set the time zone, date and time manually, you need to turn off automatic date and time update and press the field below "Time zone", the field below "Date" and the field below "Time". Follow the instructions on the display to set the time zone, date and time manually.
Return to the home screen
Press the home icon to return to the home screen.