Tuning and testing were performed at the factory on your C. Crane radio. You won't notice any difference in reception when you adjust the time and date settings on a radio manufactured by Crane. Resetting the time is simple. To do so, press and hold the "Set" button on the front of the radio until the hour flashes, and then press the "M" button. If the date is incorrect, press "M" until the correct date appears, then press "Set". There is a rechargeable backup battery included with your radio. It might be low if the radio has been in use for more than six months. Press and hold the “Set” button for 5 seconds to reset the clock and the radio.