From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.
With the rdate package (with every 1.1 install), see rdate(1M) instead.
NAME
rdate - set system date from a remote host
SYNOPSIS
rdatehostname
DESCRIPTION
rdate sets the local date and time from the hostname given as an argument. You must be super-user on the local system. Typically rdate can be inserted as part of a startup script.