Set the time and date
- In the Timekeeping Mode, hold A for at least two seconds and let go when the Home City name shows; the hands move out of the way.
- Press C to step through the settings: Home City, summer time, seconds, hours, minutes, year, month, day, 12/24-hour format, date format, day of the week language, button tone, light duration, auto time correction, then Power Saving.
- On the seconds, press D to reset them to 00.
- On the other settings, use B and D to change them (hold for fast).
- Press A to leave the setting screen.
Good to know
Resetting the seconds between 30 and 59 adds one minute.
For the 12/24-hour format, press C eight times from the Home City until 12H or 24H flashes, then press D to switch. In 12-hour format, P marks p.m.
When the watch is paired with a phone running CASIO WATCHES, it sets its time by itself, connecting at around 12:30 a.m., 6:30 a.m., 12:30 p.m. and 6:30 p.m. To set the time from the phone now, open CASIO WATCHES, keep the phone within one meter and press D in the Timekeeping Mode: TIME flashes, then OK shows and the time is corrected.
If the watch connects to the phone but still shows the wrong time, check the hand alignment.
In any mode, hold C for at least one second to go back to the Timekeeping Mode.
From Casio's guide, page 16