How to adjust the time of electronic wall-mounted perpetual calendar

There are four keys behind the perpetual calendar, namely: up, down, set and return. Press the "Set" key to enter the time setting state, and the year flashes at the same time. You can press "Adjust Up" or "Adjust Down" to modify the year, press "Set" to switch the flashing to the modified Gregorian calendar month, and press "Adjust Up" or "Adjust Down" to modify the month; Day, hour, minute and second can be set in the same way; Week, lunar month and day will change automatically with the change of Gregorian calendar.

After 2.2 seconds is set, press the "Set" key to exit the time setting and return to the normal time state.