RTC && localtime

Hi all,
I installed successfully the RTC battery and I have the RTC working
fine.
(http://groups.google.com/group/beagleboard/browse_thread/thread/
9a91e7acee3b3540)

Now I'd like to have the date and time working in localtime.

For example in my Slackware Linux I have the bios clock in UTC mode
but the system have the right timezone so I can see the right date
from also considering solar or legal time.

How can I set this in the beagleboard?