iCalendar

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iCalendar
File extension : .ics, .ifb, .iCal, .iFBf
MIME type : text / calendar
Type: Calendar exchange format
Standard (s) : RFC 5545

(Updated by RFC 5546 , RFC 6868 , RFC 7529 , RFC 7986 )


iCalendar is a data format for the exchange of calendar content , which is standardized in RFC 5545 . The format is based on vCalendar and was originally defined in RFC 2445 from November 1998.

The abbreviation iCal is the file name extension for iCalendar files under macOS and was previously used for the calendar application of this operating system. ics is the corresponding filename extension for other operating systems. The filename extensions iFBf (for Mac OS X) and ifb (all other operating systems) are provided for information on when you are free or busy.

iCalendar is not limited to file sharing or any particular network protocol . Rather, the standard fundamentally defines the Internet Media Type text / calendar for almost any embedding.

For example, websites can be used to distribute the dates of an event using iCalendar, to publish occupancy times or waste collection dates. WebDAV servers enable the format to synchronize appointments. It is also possible to exchange appointments in the Personal Area Network - for example via IrDA or Bluetooth - between PDAs or mobile phones . With the help of iCalendar it is also possible to use calendar information together in several applications.

RFC 5546 defines the iTIP protocol based on iCalendar for interoperability in groups on the application layer . RFC 6047 in turn defines iMIP based on iTIP for exchange using the Simple Mail Transfer Protocol .

The iCalendar format is accepted by the majority of calendar programs that can incorporate (subscribe to) web-based calendar data, among other things. a. Google Calendar / Android Calendar, Microsoft Outlook , Blackberry Calendar Apps and all macOS / iOS calendar applications. This is why iCalendar-based calendars are widely used to publish fixtures for sports and music events. One directory of such calendars is iCalShare.

The Calsify working group of the Internet Engineering Task Force was responsible .

example

BEGIN:VCALENDAR
VERSION:2.0
PRODID:http://www.example.com/calendarapplication/
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/Berlin
BEGIN:STANDARD
DTSTART:16011028T030000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:16010325T020000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:461092315540@example.com
ORGANIZER;CN="Alice Balder, Example Inc.":MAILTO:alice@example.com
LOCATION:Irgendwo
GEO:48.85299;2.36885
SUMMARY:Eine Kurzinfo
DESCRIPTION:Beschreibung des Termines
CLASS:PUBLIC
DTSTART;TZID=Europe/Berlin:20200910T220000Z
DTEND;TZID=Europe/Berlin:20200919T215900Z
DTSTAMP;TZID=Europe/Berlin:20200812T125900Z
END:VEVENT
END:VCALENDAR

See also

Individual evidence

  1. ↑ RFC 2446 - iCalendar Transport-Independent Interoperability Protocol (iTIP) . Internet Engineering Task Force. November 1998. Retrieved August 20, 2011.
  2. ↑ RFC 2447 - iCalendar Message-Based Interoperability Protocol (iMIP) . Internet Engineering Task Force. November 1998. Retrieved August 20, 2011.
  3. ↑ Patrick Crowley: iCalShare ( English ) Retrieved on December 1, 2018: "The largest calendar sharing resource on the web."
  4. ↑ Calsify Status Pages . Internet Engineering Task Force. Retrieved August 8, 2011.