Just a reminder to everyone (at least in North America) that time changes tonight. We fall back an hour and gain an hour of sleep. Always check your systems tomorrow to ensure they changed correctly.
Last spring I made a post on how to set the time source on Windows Server 2008. Nothing has changed, so no need to rehash it. Just remember, if you need to set a time source for your Windows Domain, run the commands on your Windows Server with the PDC emulator role.
If you are using Linux, some versions have a command named ntupdate to update against a time server. This command also works in FreeBSD and probably other *nix environments. The command line to update against a server (in this case the NRC) is: ntpdate time.nrc.ca. If you want it to update automatically, add the command as a cronjob.
Finally, if you are using ntpd, change the servers by editing the /etc/ntp.conf file. Add the line server time.nrc.ca to add the time server at the NRC.