To change the time on JVC KD-S5050 1- Press and hold SEL for 2 or more seconds. CLOCK H, CLOCK M, SCM LINK OR LEVEL APPEARS ON THE DISPLAY 2- If CLOCK H is shown on the display - use your volume button to select the hour. If CLOCK H, is not shown on display, use your track changer/tuner buttons to find CLOCK H. 3- When you have set the hour press SEL again to save the setting. 4- Repeat these steps for minutes using CLOCK M. HOPE THIS HELPS MARY LEA