Push the clock button located next to the "AM" button just above the radio. Depressing the button for about 5 seconds will make the clock falsh indicating that the clock can be reset. You can rest the time my using the large channel keys for the radio/cd player. Two of the keys have arrows. One key has a "H" and one key has a "M". H changes the hour and M changes the mintues. Once you have set the time just push the clock button again and you are done.