mencal(1) on Linux
The text a291e8f2edd7, as Debian 3.0 (Woody) shipped it.
manual page for Menstruation Calendar version 1.1
Flags it lists
-
--duration -
--help -
--length -
--monday -
--month -
--quiet -
--rcfile -
--rcforce -
--rcsave -
--start -
--version -
--year -
-M -
-R -
-V -
-d -
-f -
-h -
-l -
-m -
-q -
-r -
-s -
-y