Date and time
To change the clock type, time, time zone, or date, select Menu > Settings > Date
and time.
When travelling to a different time zone, select Menu > Settings > Date and
time > Date & time settings > Time zone:, and scroll left or right to select the time
zone of your location. The time and date are set according to the time zone and enable
your phone to display the correct sending time of received text or multimedia messages.
For example, GMT -5 denotes the time zone for New York (USA), 5 hours west of
Greenwich, London (UK).