Taken from PT-1s Helpfile.
As the Images are compiled for Germany the Timezone is fixed for Europe (GMT+1)
If you want to change this please telnet into the Dbox
Type vi /etc/profile or depending on your Image /var/etc/profile
press the insert button
move the cursor to the highlighted area
export TZ=CET-1CEST,M3.5.0/2,M10.5.0/3
and change into
export TZ=GMT-0BST,M3.5.0/2,M10.5.0/3
press escape then hold down the shift key and press z twice ( this saves the edited file)