Set the time and date
- In the Timekeeping Mode, hold A for at least two seconds: the step reminder setting flashes.
- Press C to move through the settings: step reminder, daily step target, seconds, hours, minutes, 12/24-hour format, year, month, day, button tone, light duration, power saving.
- On the seconds, press D to reset them to 00.
- On any other setting, use B and D to change it (hold for fast).
- Press A to finish.
Good to know
When the watch is paired, it corrects its time from the phone; setting it by hand is for when it cannot connect.
Resetting the seconds between 30 and 59 adds one minute.
From Casio's guide, page 16