20260923-0 IKalender ICalendar ICalendar ICalendar 2018-11-06 1998-01-01 ICS 2018-11-28 2018-11-14 iCalendar iCalendar is a computer file format which allows Internet users to send meeting requests and tasks to other Internet users by sharing or sending files in this format through various methods. .icalendar text/calendar .ics .ifb .ical ICS false ICS 1998-01-01 ICS true true true