Finally I did it through a terminal with tzdata package reconfiguration interface.
I’ve succesfully change my Linux timezone issuing the command:
debian-linux:~# dpkg-reconfigure tzdata
Afterwards all I had to do is navigate through the menus and select my desired country where I abide as well as the Country capital.
To finalize the clock changes and tune it in accordance with the time zone changes I had to also execute the command:
debian-linux:~# ntpdate time.nist.gov &
Now your clock in the left upper gnome corner will again start showing up the correct time.
You are abou to get some feedback similar to from the above command:
Current default time zone: 'Europe/Amsterdam'
Local time is now: Mon Sep 6 18:48:47 CEST 2010.
Universal Time is now: Mon Sep 6 16:48:47 UTC 2010.
