Set the time and date
- In the Timekeeping Mode, hold A until the seconds start to flash.
- Press C to step through the settings: seconds, DST, hour, minutes, year, month, day.
- On the seconds, press D to reset them to 00.
- On the hour, minutes, year, month or day, press D to go up and B to go down.
- Press A twice to leave: the first press opens the UTC differential screen, the second exits.
- In the Timekeeping Mode, press D to switch between 12-hour and 24-hour format.
Good to know
Set the Home Site data (UTC differential, longitude, lunitidal interval) too, or the Moon and tide data will be wrong.
From Casio's guide, page EN-10