This tutorial shows you how to update timezone on your CentOS/Redhat machine. Run the command below to install system-config-date.

[root]# yum install system-config-date
[root]# setup

Go-to -> Timezone configuration -> Select your local time zone -> Click OK -> Quit.

To check your current timezone:
[root]# date
Sun Mar 15 23:50:42 MYT 2009