How to change a perpetual calendar from a constellation calendar to an ordinary calendar?

1. The button for adjusting the calendar time is on the back. First, turn it over, and then click the double arrow button of the calendar.

2. Press once, the number of years of the electronic clock will start flashing, then press the modify key to modify according to the date, press again, and it will be the turn of the month to flash, and modify in the same way.

3. Press the "Reset" button after adjustment.