The ntp package is a small implementation of a limited NTP client. It requests the current time from a remote NTP server according to selected version of the NTP protocol. Client uses version 4 of the NTP protocol RFC5905 by default.
The approach was inspired by a post to the go-nuts mailing list by Michael Hofmann:
https://groups.google.com/forum/?fromgroups#!topic/golang-nuts/FlcdMU5fkLQ