G-Shock MRG-8100B-1A - Manual (Page 65)

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3.
Press B to toggle between
standard time (STD) and
summer time (DST).
You will not be able to change the • •
STD/DST setting while the watch’s
hands are moving to the current time
for a newly selected city code. Wait
until the hands stop moving.
Standard time • •
The left dial hand points to STD (standard time).
Summer time • •
The left dial hand points to DST (summer time).
Summer time is one hour ahead of standard time.
The watch will adjust the STD/DST setting automatically when it • •
receives a time calibration signal while any one of the following city
codes is selected as the Home City.
LON, PAR, ATH, TYO, ANC, LAX, DEN, CHI, NYC
The watch will not adjust the DST setting automatically while either
of city codes shown below is selected as the Home City. In this
case, you will need to change between standard time and summer
time manually.
HKG, HNL