Not sure this is your radio but we seem to have a lot of people asking how to set the clock on CSS radios. So I have decided to post this answer for your question. The instructions address several models of CSS Radios
1. Turn radio on
2. Press and hold th T/.F button until the time (Hour) display begins to flash
3. Turn Volume counterclockwise to increase hours and clockwise to turn down the hours.
4. Press and hold down the T/F button once again to set the minutes, same as hours
5. 5 seconds after the adjustment is made the time will be set