To make sure your server always tells the correct time, follow these two instructions.

1. Install the ntp daemon
   ntpd will make sure your system clock is regularly sync’ed against the nearest atomic clock.

   yum install -y ntp &&\
chkconfig ntpd on &&\
ntpdate pool.ntp.org &&\
service ntpd start

2. Make sure your time-zone is correct
   Set your time-zone to the right one with this command (for Central European Time)

   ln -sf /usr/share/zoneinfo/CET /etc/localtime