Honda Prelude 1990 Online Reference Owner's Manual page 37

Digital Clock
The time is displayed continuously when the ignition is on.
At all other times, push in on the lid to display the time.
To adjust the time:
1. Lower the lid.
2. Push the minute button
(MIN) and hold it until the
numbers advance to the
desired minutes.
3. Push the hour button
(HOUR) and hold it until
the numbers advance to
the desired hour.
4.The RESET button allows you to synchronize your clock to the
closest hour. If the time on the clock is before the half hour,
pressing the RESET button will return the time to the previous
hour. If the time is beyond the half hour, the RESET button will
change the time to the next hour.
NOTE:
Be careful not to push the HOUR, MIN or RESET buttons
accidentally. Pushing any of them will change the clock's time
setting.
Clock