rdate(8) on OpenBSD
The text e45b7e1162e3, as OpenBSD 7.8, OpenBSD 7.7, OpenBSD 7.6, OpenBSD 7.5 shipped it.
set the system's date from a remote host
Flags it lists
-
-4 -
-6 -
-a -
-c -
-n -
-o -
-p -
-s -
-v