To Change the Time and Date on a Partner ACS System

This must be done at extension 10 or 11:
Press Feature and dial 00
Press the left intercom button twice
To set the time, press the pound (#) key and dial 103. Enter the correct time using a 24-hour clock (if it’s afternoon, add 12 to the […]

On most Toshiba Systems you can change the time by doing the following.
Hit #652 (the time(24 Hrs) including the seconds followed by #.
Example
For 4:20 pm
#652 162000 #
We also wrote about this previously here