Press "Time" then hold down for about 2 seconds -analog timepiece will start flashing. To set 10:25 PM June 15: Press 10 then "Hour" then select AM/PM, press 25 then "Min", press 06 then "Hour", press 15 then "Min", then press "Time" . The setting is not activated until you press "Time" so synchronize with the Cell Phone time for dead on accuracy