Changing Timezones - tooltwist/documentation GitHub Wiki
sh-4.1# mv /etc/localtime /etc/localtime-old
sh-4.1# ln -sf /usr/share/zoneinfo/NZ /etc/localtime
At this point, system timezone has changed ephemerally. You can check now.
sh-4.1# date
Thu Mar 21 10:43:10 NZDT 2013
Edit /etc/sysconfig/clock
sh-4.1# /etc/sysconfig/clock
change ZONE="UTC" to ZONE="NZ"