Set the time and date
- In the Timekeeping Mode, hold A for at least two seconds to open the setting menu.
- Use A and C to point to TIME ADJUSTMENT, press B, then point to MANUAL and press B.
- Use A and C to set the hour, then press B to move on.
- Set the minute, year, month and day the same way, pressing B after each.
- Use A and C to pick YES, then press B to save.
- Press D twice to leave the menu.
Good to know
Paired with a phone through the CASIO WATCHES app, the watch sets its time automatically.
12/24-hour format is its own item, 12/24H, under TIME ADJUSTMENT.
From Casio's guide, page 8