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Property Name



This property identifies a URI where calendar data can be refreshed from.

Value Type

URI -- no default

Property Parameters

IANA and non-standard property parameters can be specified on this property.


This property can be specified once in an iCalendar object.


This property identifies a location where a client can retrieve updated data for the calendar. Clients SHOULD honor any specified "REFRESH-INTERVAL" value when periodically retrieving data. Note that this property differs from the "URL" property in that "URL" is meant to provide an alternative representation of the calendar data rather than the original location of the data.

Format Definition

This property is defined by the following notation:

 source       = "SOURCE" sourceparam ":" uri CRLF

 sourceparam = *(";" other-param)


The following is an example of this property


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.

Need to test your iCalendar feeds?

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.