I always have some time issues in Linux. Here the howto:
Check the time
# date
Fri Mar 18 21:50:43 CET 2011
Install and configure NTP
# yum install ntp
# service ntpd stop
# ntpdate pool.ntp.org
# /etc/init.d/ntpd start
# chkconfig ntpd on
Configure the localtime
# cd /etc/
# ls -la |grep localtime
# /etc/localtime -> /usr/share/zoneinfo/Europe/Amsterdam
# ln -sf /usr/share/zoneinfo/Europe/Amsterdam /etc/localtime
Configure the shell time
export TZ=CET