I tried this to create an iCalendar entry that Outlook could read: 
  use Data::ICal;
  use Data::ICal::Entry::Event;
  use Date::ICal;
  use strict;

  my $calendar = Data::ICal->new();

  my $vtodo = Data::ICal::Entry::Event->new();
  $vtodo->add_properties(
    summary => "some fun",
    description => "a fun thing to do",
    dtstart => Date::ICal->new ( day => 29, 
               month => 6, 
               year => 2006,
               hour => 7,
               min => 15,
               sec => 00
        )->ical,
     dtend => Date::ICal->new(day => 29, 
               month => 6, 
               year => 2006,
               hour => 7,
               min => 45,
               sec => 00
        )->ical,
  );
  $calendar->add_entry($vtodo);
  print $calendar->as_string;

[download]
The entry looks like this: 
BEGIN:VCALENDAR
PRODID:Data::ICal 0.07
VERSION:2.0
BEGIN:VEVENT
DESCRIPTION:a fun thing to do
DTEND:20060629T134500Z
DTSTART:20060629T131500Z
SUMMARY:some fun
END:VEVENT
END:VCALENDAR

[download]
Which looks reasonable to me. Outlook says "The operation failed." when I put the output into an ics file and import it. Ideas?

In reply to Create an Outlook iCalendar entry? by traveler

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