Sharp ZQ-4300 Operation Manual page 24

CLOCK], 1 then ENTER] are pressed, even if
the time setting is not changed.
After this operation, seconds are reset to 00.
WORLD time clock
To set: 1. Press CLOCK}.
2. Select "i WORLD CLOCK".
2
3. Press
ENTER].
" 3 " appears on the display and DST is set. Setting DST in
the WORLD clock automatically sets the time one hour ahead.
To clear: 1. Press CLOCK].
2. Select "MA WORLD CLOCK".
2
3. Press [ENTER].
" 4 " disappears and the time for all WORLD cities is set one
hour backwards.
24