For model specific set up see your owners manual.
For DCT and TRU models:
Day & Time sets the day and time of your display.
1) Enter the Global Setup menu, and then the Day & Time
submenu option (see "Entering the Menu" on page 16 of the woner's manual).
2) Press volume up/down to select the day of the week, and then the "arrow" soft key.
3) Press volume up/down to set hour, and then press the "arrow" soft key.
4) Press volume up/down to set minute, and then press the "arrow" soft key.
5) Press volume up/down to choose AM or P M, and then press the SAVE soft key. You will hear a confirmation tone.
For all other models you must use the clock/menu button on your base to enter the set up. Use you select keys to scroll through the options and set to set each thing you change. Please see you owners manual.