G-Shock GW-1800DJ-1A9 - Manual (Page 62)

E-61
Setting
City code
DST (summer time)
Auto receive
Initial Factory Default
(Tokyo)
(Auto switching)
(Auto receive)
Transmitters
The time calibration signal received by this watch depends on the currently
selected Home City code (page E-12).
• When a U.S. time zone is selected, the watch receives the time calibration signal
transmitted from the United States (Fort Collins).
• When a Japanese time zone is selected, the watch receives the time calibration
signals transmitted from Japan (Fukushima and Fukuoka/Saga).