Changing the time on a Norstar system must be done using a display phone. Using a M7310, M7324, or T7316. The 4 top line/feature keys are now used for programming.
the right 2 buttons under the display are "NEXT" and "SHOW" respectively.

1.- To enter programming mode press "FEATURE" and "* * 2 6 6 3 4 4"
2.- Enter password (default = 266344) - display should read "Terminals & Sets"
3.- Press "NEXT"(bottom right arrow) 5 times - display should read "Time and Date"
4.- Press "SHOW" (top right arrow)- display should read "Hour:___"
5.- Press softkey "CHANGE"
6.- Enter hour - display should read "AM OK or Change"
7.- Select AM or PM
8.- Press "NEXT"(bottom right arrow) - display should read "Minutes:___"
9.- Press softkey "CHANGE"
10.- Enter minutes
11.- Press "NEXT"(bottom right arrow) - display should read "Year:___"
12.- Press softkey "CHANGE"
13.- Enter year
14.- Press "NEXT"(bottom right arrow) - display should read "Month:___"
15.- Press softkey "CHANGE"
16.- Enter month
17.- Press "NEXT" (bottom right arrow)- display should read "Day:___"
18.- Press softkey "CHANGE"
19.- Enter day
20.- Press "NEXT" (bottom right arrow)
21.- Press the Rls key