I am donating some of my resources and some of my time to the community. I have set up and am now managing two time servers for the pool.ntp.org project.
One is located in the San-Francisco Bay Area [us.time.bsdhost.net], and the second one is in Paris France [fr.time.bsdhost.net].
If you want to configure your machine to use nptd here is how.
On MacOS X
Start the program "System Preferences", click on "Date & Time", select the tab "Date & Time". Check the box "Set date & time automatically" and in the field on the right enter "0.us.pool.ntp.org 1.us.pool.ntp.org 2.us.pool.ntp.org".
That's all. Your Mac will now be on time at a 1/100 of a second.
On Unix, BSDLike systems or Linux
Edit the file /etc/ntp.conf as follows:
server 0.us.pool.ntp.org server 1.us.pool.ntp.org server 2.us.pool.ntp.org server 3.us.pool.ntp.org driftfile /var/db/ntp.drift
Then you need to start or restart your server.
On BSD, for example, make sure you have enabled the time service. Check the file /etc/rc.conf and check if the line ntpd_enable="YES" is present. and start the service by typing the following command.
/etc/rc.d/ntpd start
Windows
On recent versions of Windows, such as XP and Vista, this command enables the ntp client.
net time /setsntp:"0.pool.ntp.org 1.pool.ntp.org 2.pool.ntp.org"
For older versions of Windows you may need to install an ntp daemon for windows