Please ensure this is the bell system you're using before proceeding :
1. Open the LATCH below the display screen
2. PRESS and HOLD the TIME ADJ button until the small clock icon appears on the screen
See the clock icon appear on the screen:
3. Release the TIME ADJ button - you are now in the mode to adjust the Hour/Minute/Day
4. Choose the desired HOUR time by pressing the H button
Important : Ensure you select the correct AM/PM or 24 hour time. To switch between AM/PM/24 hour formats refer to the above section.
5. Once you have the correct HOUR selected on the screen, press the WRITE (3) button to save these changes.
6. Close the LATCH. Your display time has now been adjusted for Daylight Savings
Sorted, you're all set!