Changing the Time on the Macrotel 816 Telephone System

From any display telephone:

1.    With the handset on-hook (hung up) dial #20.
             the display will show MMC DISABLE
2.    Dial the 4 digit passcode (usually 4321)
            the display will show MMC ENABLED
3.    Dial 1#
4.    Dial #55
5.    Enter the new date and time
            YY = year (02 is 2002, 03 is 2002, etc.)
            MM = month (01 is January, 02 is Februray, etc.)
            DD = day of the month (01 is the 1st, 02 is the second, etc.)
            W = day of the week (0 is Sunday, 1 is Monday, etc.)
            HH = hours in military time (12 is noon, 13 is 1 p.m., etc.)
            MM = minutes (00-59)
6.    Dial # to store and exit.

The display should return to normal.