One of the easiest way to change your FreeBSD box’s timezone by copying the respective timezone to /etc/localtime. In my case, the timezone is Asia/Jakarta.

jktprx01# date
Fri May 20 04:08:04 UTC 2011
jktprx01# cp /usr/share/zoneinfo/Asia/Jakarta /etc/localtime
jktprx01# date
Fri May 20 11:09:49 WIT 2011

The other convenient way to change the timezone from ‘sysinstall’ which not covered in this writing