Setting an alarm clock is actually quite simple. Begin by checking the clock for a button that lets you access the time-setting modes. This will usually be labeled mode, clock set, settings, or time. Press that button until the numbers start blinking. Then press the hour button until your desired hour is displayed. Do the same for the minute button until you get the desired value. Finish by pressing the mode or clock set button to save the changes and return to your normal time mode.