Casio 3410 User guide

Firstly, make sure it is in the Timekeeping Mode.
DST Setting Module : 3410
-Upper display
Day of week
-Middle display
Month - Day
-Lower display
Time
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<Timekeeping Mode Screen>
To return to the Timekeeping Mode
from any other mode, hold down (D)
button for about two seconds.
In the Timekeeping Mode, Hold
down (E) button for at least two
seconds until "Hold" disappears.
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City code will appear on the top.
SET will start to flash.

Press (E) button twice to exit the
setting screen.
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Use (A) button to toggle ON and OFF.
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Press (D) button to display the
DST setting screen.