ntpdate(8) on FreeBSD
The text a6c1e3c2f3ef, as FreeBSD 11.4-RELEASE shipped it.
set the date and time via NTP
Flags it lists
-
-4 -
-6 -
-B -
-a -
-b -
-d -
-e -
-k -
-o -
-p -
-q -
-s -
-t -
-u -
-v