Panasonic DMC-ZS20W Basic Owner's Manual page 16

Setting the clock
When [Please set the home area] is displayed,
press [MENU/SET]
Press
and press [MENU/SET]
The current time and home area are set.
■
To change the time setting
Select [Clock Set] from [Rec] or [Setup] menu, perform
16
VQT4B72 (ENG)
to set your home area
and .