Man pages matching name datetime::event::ical in section 3pm:

DateTime::Event::ICal.3pm.en	debian 10 / libdatetime-event-ical-perl
DateTime::Event::ICal.3pm.en	debian 11 / libdatetime-event-ical-perl
DateTime::Event::ICal.3pm.en	debian 12 / libdatetime-event-ical-perl