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? What is ICS? Why is it necessary to log in to my Google account in order to integrate with iCalendar? What does the abbreviation URL mean? What requirements must I fulfil in order to connect BedBooking with Booking.com? Comments 0 comments Please sign in to leave a comment.