ical2html(1) on Linux
The text 866ef47dec01, as Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
create an HTML table from icalendar data
Flags it lists
-
--category -
--class -
--description -
--footer -
--location -
--monday -
--not-category -
--not-class -
--timezone -
-C -
-P -
-c -
-d -
-f -
-l -
-m -
-p -
-z