Configuring World Time City Settings
Specifying a World Time City with the CASIO WATCHES phone app causes the watch’s World Time City to change accordingly. Settings can be configured to perform auto summer time switching for the World Time City.
Check the connection
- Make sure the
symbol is shown on the watch display when you perform the procedure below. If
is not displayed, refer to the information at the link below.

To select a World Time City
-
1.
Tap the “CASIO WATCHES” icon. -
2.
Tap the “My Watch” tab. -
3.
Select “GBA-900” and tap it. -
4.
Select the setting you want to change and then perform the operation shown on the screen.
Configuring the Summer Time Setting
-
1.
Tap the “CASIO WATCHES” icon. -
2.
Tap the “My Watch” tab. -
3.
Select “GBA-900” and tap it. -
4.
Select the setting you want to change and then perform the operation shown on the screen. -
- “Auto”
The watch switches between standard time and summer time automatically.
- “OFF”
The watch always indicates standard time.
- “ON”
The watch always indicates summer time.
- “Auto”

Top of page