Time is always important! Most of your web applications will rely heavily on the time being correct. I usually set my servers up to periodically check/adjust the time via a cronjob:
Code:
22 * * * * /usr/sbin/ntpdate -u time.mytimeserver.com >/dev/null 2>&1
Every 22 minutes after the hour the server checks its time. Of course you need a time server to ping. Your host should have one in house but there are many free ones that you can find on google.