Man pages matching name data::ical::entry::event in section 3pm:

Data::ICal::Entry::Event.3pm.en	debian 10 / libdata-ical-perl
Data::ICal::Entry::Event.3pm.en	debian 11 / libdata-ical-perl
Data::ICal::Entry::Event.3pm.en	debian 12 / libdata-ical-perl