Date and Time
The date and time are displayed in the phone's status line.
The date and time are needed to log incoming, outgoing and missed calls and to control various functions on the phone, such as automatic updates.
Configuration
With the Configuration Manager:
Date and Time > Basic Network Settings
Or directly on the phone:
Settings > Date and Time
Or using provisioning:
You will find more information on this subject in the Auerswald DokuWiki
* Note: If you change the time zone, the time stamp assigned to all data on the phone is adjusted to suit the new time zone.