Rdate displays and sets the local date and time from the host name or
address given as the argument. It uses the RFC868 protocol which is usu-
ally implemented as a built-in service of inetd(1)
Available options:
-p Do not set, just print the remote time
-s Do not print the time.
-a Use the adjtime(2) call to gradually skew the local time to the
remote time rather than just hopping.
inetd(1) adjtime(2)
BSD April 30, 1994 BSD