Other Help Topics :: Set up correct time

Assuming you have the correct timezone set and have followed all of the other good advice these fine people have given you...

`apt-get install rdate`

then:

`su sudo crontab -e`

and add

Code Sample

0 3,9,15,21 * * * /usr/sbin/rdate 128.2.136.71 | logger -t NTP

now, you'll always have the right date/time.

original here.