rfc-2445
iCalendar RFC 2445
RFC 2445, "Internet Calendaring and Scheduling Core Object Specification (iCalendar)", commonly referred to as iCalendar or iCal, forms the basis of the hCalendar microformat.
When normatively referencing RFC 2445 on this wiki, either do so by linking to this page with:
{{RFC2445}}
or directly to http://www.ietf.org/rfc/rfc2445.txt.
alternate references
Avoid linking to the informative HTML translation of rfc2445.txt, which you must explicitly do by avoiding simply using RFC 2445 (like that) in your text, as MediaWiki appears to auto-hyperlink it to the HTML translation.
previous versions
vCalendar
vCalendar, sometimes referred to as "iCal 1.0", or vCal.