Check what the current timezone is:
date
For example, the result is:
Mon May 7 17:42:57 EEST 2012
To change the timezone first look at what timezones are available by running the following command on the command line interface:
ls /usr/share/zoneinfo/
As a result you’ll see:
[root@host1 ~]# ls /usr/share/zoneinfo
Africa Australia Cuba Etc GMT0 Iceland Japan MST Poland right Universal Zulu
America Brazil EET Europe GMT-0 Indian Kwajalein MST7MDT Portugal ROC US
Antarctica Canada Egypt Factory GMT+0 Iran Libya Navajo posix ROK UTC
Arctic CET Eire GB Greenwich iso3166.tab MET NZ posixrules Singapore WET
Asia Chile EST GB-Eire Hongkong Israel Mexico NZ-CHAT PRC Turkey W-SU
Atlantic CST6CDT EST5EDT GMT HST Jamaica Mideast Pacific PST8PDT UCT zone.tab
Simply import new timezone:
cat /usr/share/zoneinfo/Europe/Kiev > /etc/localtime
or
rm /etc/localtime
ln –s /usr/share/zoneinfo/Europe/Kiev /etc/localtime