Casio 5230 User guide

Firstly, make sure it is in the Timekeeping Mode.
DST Setting Module : 5230
To return to the Timekeeping Mode
from any other mode, hold down (C)
button for at least four seconds.
ADJ
1.
NYC
SET
2.
<Timekeeping Mode Screen>
City code and city name
"SET" will start to flash in the left digital dial.
The city code and city name will scroll
across the right digital dial.
In the Timekeeping Mode, hold down (A)
button for two seconds until ADJ appears
in the right digital dial.

9:10 ON
5.
4.
Press (A) button to return to
the Timekeeping Mode.
Use (D) button to toggle ON, OFF and AUTO.
9:10 OFF
OFF
10:10 AUTO
10:10 ON
ON
AUTO
9:10 OFF
3.
Press (C) button once.
Current DST setting will appear.
DST indicator