How do you change time on radio clock on 2004 Mercury Grand Marquis?

To change the time on the radio clock in a 2004 Mercury Grand Marquis, start by turning on the ignition without starting the engine. Press the "Clock" button on the radio until the time display starts flashing. Use the "Seek" or "Tune" buttons to adjust the hours and minutes accordingly. Once the correct time is set, press the "Clock" button again to save the changes.