Quote from esbee on Sep 11th, 2011, 9:04pm: You will need to press the "all clear" button and go through the set-up process. After you select a 24h or 12h time display, hold the "mode" button in and the computer will go into the time set mode. Set the hour by pressing the "mode" button repetitively. Once the hour is set, hold the "mode" button in and the minutes will be ready to be set. After setting the minutes, press the "menu" button to register the time setting.