Run the date command to make sure you have the correct time:

[root@server /root]# date
Thu Sep 20 11:00:06 CDT 2001
[root@server /root]#

If your timezone is correct but the date and/or time needs updating, the following commands will update the date and time. The second command is needed in order to push the date and time into the PC clock.

[root@server /root]# date 092011082001
Thu Sep 20 11:08:00 CDT 2001
[root@server /root]# hwclock --utc --systohc
[root@server /root]#