Adjustment method of 555 brand digital perpetual calendar

555 brand digital calendar adjustment method is as follows:

1. Press and hold the setting key (3 to 5 seconds) until you enter the perpetual calendar setting state, and then press the setting key again.

2. After selecting grouping, press the up key or the down key to adjust the time.

3. After adjusting the calendar time, press the Exit button to exit the calendar setting state.

The perpetual calendar is the oldest solar calendar in ancient legends of China. The name of perpetual calendar comes from a man named Wannian in Shang Dynasty. He is the editor of this kind of calendar. In order to commemorate his achievements, he named this calendar "perpetual calendar".