Bug #128744 for Data-ICal: Ical date bug(?); feature request

I am no ical expert, but may have hit on a bug in Data::ICal. I want to make a series of events as "all day". As near as I can tell, to do that, you provide a day only as DTSTART and DTEND. So I figured out that you have to force those two values to be of data type DATE, like so: my $event = Data::ICal::Entry::Event->new(); $event->add_properties( ... dtstart => [ $dt, { VALUE => 'DATE' } ], dtstart => $dt, dtend => $dt, ); So far so good. The output is, DTEND:VALUE=DATE:20190116 DTSTART:VALUE=DATE:20190116 Unfortunately that fails the icalendar validator at https://icalendar.org/validator.html. Also, nextcloud (https://nextcloud.com/) refuses to import it, which is one of my requirements. The validator and nextcloud accepts these: DTEND;VALUE=DATE:20190116 DTSTART;VALUE=DATE:20190116 The difference is that for the first punctuation mark the validator requires a semicolon (;), not a colon (:). It would also be nice if the code could figure out on its own to make the value a DATE. Thank you. -- "When we talk of civilization, we are too apt to limit the meaning of the word to its mere embellishments, such as arts and sciences; but the true distinction between it and barbarism is, that the one presents a state of society under the protection of just and well-administered law, and the other is left to the chance government of brute force." - The Rev. James White, Eighteen Christian Centuries, 1889 Key fingerprint = CE5C 6645 A45A 64E4 94C0 809C FFF6 4C48 4ECD DFDB https://charlescurley.com