cal(1) on FreeBSD
The text ef01b97817a1, as FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE, FreeBSD 5.1-RELEASE, FreeBSD 5.0-RELEASE shipped it.
displays a calendar and the date of easter
Flags it lists
-
-J -
-e -
-j -
-o -
-p -
-s -
-w -
-y