Polycom Conference Phone Owner's Manual page 58

Updating the Time and Date Display
The time and date appear on the idle screen of your phone. You
can select from various formats for the time and date display,
including whether the time or date displays first (clock order).
You can also turn the time and date display off, so the time and
date does not display on the idle screen. Select and set options
that are right for you.
The following figure shows the default format for the date and
time display on the phone screen.
To update the time and date display:
1. Press , and then select Settings > Basic > Preferences >
Time and Date.
The Time and Date screen displays.
2. Do one of the following:
To change the date format, press
or
To change the time format, scroll to Clock Time, and then press
.
The Clock Date screen or the Clock Time screen displays.
Or
.