You can choose to have the display show the time in 12-hour (AM/PM) or 24-hour time.
To change the time format, follow these steps:
On the remote, press and hold Alarm Setup/menu until "-Setup menu-" is displayed
Press Tune/Playlist > three times until "Time-" is displayed
Press Time - or Time + to select "12-hour" or "24-hour"
Press Alarm Setup/Menu to exit the setup menu or wait 10 seconds for the setup menu to exit automatically