•1.On the back of the clock, there are two buttons, top-button and bottom-button.
•2.Press top-button or bottom-button, it displays "month" and "day".
•3.Press bottom-button twice to display "month", then press top-button to set "month".
•4.Press bottom-button three times to display "day”, then press top-button to set "day”.
•5.Press bottom-button four times to display "hour", then press top-button to set "hour".
•6.Press bottom-button five times to display "minute", then press top-button to set "minute".
•7.Press top-button once to display "month" and "day", three seconds later, return to normal time.
•8.Press top-button twice to display "seconds", then press bottom-button to return to zero.