User Vinícius Zavam of DigitalOcean shows us how to get OpenNTPd setup on FreeBSD 10.2. OpenNTPd is an open source alternative implementation of the Nework Time Protocol. See the link below for the full instructions.
NTP, the Network Time Protocol, is a standardized protocol providing ways to synchronize time on various operating systems. OpenNTPd is a free and easy-to-use implementation of the Network Time Protocol (NTP), originally developed as part of the OpenBSD project. It provides the ability to sync the local clock from remote NTP servers and can also act as server itself.
This tutorial will show you how to install OpenNTPd on FreeBSD.