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The following sections define the details of a Calendaring and Scheduling Core Object Specification. The Calendaring and Scheduling Core Object is a collection of calendaring and scheduling information. Typically, this information will consist of an iCalendar stream with one or more iCalendar objects. The body of the iCalendar object consists of a sequence of calendar properties and one or more calendar components.

Section 3.1 defines the content line format; Section 3.2 defines the property parameter format; Section 3.3 defines the data types for property values; Section 3.4 defines the iCalendar object format; Section 3.5 defines the iCalendar property format; Section 3.6 defines the calendar component format; Section 3.7 defines calendar properties; and Section 3.8 defines calendar component properties.

This information is intended to be an integral part of the MIME content type registration. In addition, this information can be used independent of such content registration. In particular, this memo has direct applicability for use as a calendaring and scheduling exchange format in file-, memory-, or network-based transport mechanisms.

This document was automatically converted to XHTML using an RFC to HTML converter with the original text document at the Internet Engineering Task Force web site at .  The original text document should be referred to if there are any errors or discrepancies found in this document.

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The iCalendar Validator provides developers and testers a method to validate their iCalendar feeds, which can take data from either a URL, file or text snippet and compare it against the RFC 5545 specification.  We believe we have one of the best iCalendar validation tools available on the internet. More information about the validator can be found here.