Citizen AT9010-52E Instruction Manual page 35

Setting Summer Time (SMT)
Standard Time (STD)
The current time is updated based on the
summer time information included in the
radio signal received.
The summer time settings automatically
activates (SMT-AU) upon receiving the summer
time information in the radio signal. (automatic
switching mode)
Enable Standard Time (OFF)
STD-AU
34
STD-AU
Automatic (AU)
The summer time information is indicated
based on the summer time information
included in the radio signal received. When
the watch receive the summer time OFF, it
automatically switches to the normal time
indication (STD-AU).
Enable Summer Time (ON)
Automatic
switching
SMT-AU
Summer Time (SMT)
SMT-AU