Ishratanwarfoundation

  Not to be confused with Apple's   Calendar   application (previously named iCal). iCalendar Filename extension .ical, .ics, .ifb, .icalendar Internet media type text/calendar Type of format Calendar  data exchange Standard RFC 5545 (Updated by:  RFC 5546 ,  RFC 6868 ,  RFC 7529 ,  RFC 7986 ) Open format ? Yes iCalendar components and their properties The  Internet Calendaring and Scheduling Core Object Specification  ( iCalendar ) is a  media type  which allows users to store and exchange calendaring and scheduling information such as events, to-dos, journal entries, and free/busy information. [1]  Files formatted according to the specification usually have an  extension  of  .ics . With  supporting software , such as an  email reader  or  calendar application , recipients of an iCalendar data file can respond to the sender easily or counter-propose another meeting date/time. The file format is specified in a  proposed internet standard  ( RFC 5545 ) for calendar data exchange. [