What is "iCalendar" (iCal)? Marek Hrycak March 26, 2019 08:39 Updated Follow This is a calendar data exchange format. Related articles What is iCalendar? How can I download links to room calendars from Google Calendar? Which data are synchronized via iCalendar? Is integration with Booking.com or iCalendar available during the free trial period? What does the abbreviation OTA mean? Comments 0 comments Please sign in to leave a comment.