Now that we have correctly set the time and timezone on our FreeBSD system, we can configure the Network Time Protocol, or NTP on our system to ensure that it stays synchronized with UTC to keep accurate time. This tutorial over on Digital Ocean does a much better job of explaining the steps than I ever could so I would just recommend following their instructions. I have included the basic steps below. The FreeBSD Handbook also contains some additional details as well.

1. Add the following lines to your /etc/rc.conf file:

ntpd_enable="YES"
ntpd_sync_on_start="YES"

2. Start the ntpd service:

$ sudo service ntpd start