Webcal

Webcal is an unofficial uniform resource identifier (URI) scheme for accessing iCalendar files. It is also the name of two web calendar applications written in Perl.

The webcal scheme was devised for use with the Apple iCal application and has become a common de facto standard for accessing iCalendar formatted files via WebDAV, usually using GET method. It is not an official URI scheme, such as http and ftp, as registered with IANA. Webcal schema current status is Provisional under IANA website. The Webcal protocol prefix is used to trigger an external protocol handler which is passed the URL of the .ics file rather than being passed the downloaded contents of the file, in much the same way feed is sometimes used to trigger external RSS readers. The idea is that with this protocol prefix the target file should be subscribed to rather than imported into the calendar application as would happen with a simple download.

Alternative protocols

CalDAV and GroupDAV are both efforts to provide WebDAV-based access to calendar stores with finer granularity. The CalDAV Access protocol has been standardized by the IETF and published as RFC 4791. Extensions to CalDAV for automated scheduling are also standardized, as RFC 6638.

Yahoo! Calendar

Yahoo Calendar is a Web-based calendar service from Yahoo!. It can read calendar feeds and events syndicated from sites that make use of the published Yahoo calendar programming interfaces. While users are not required to have a Yahoo Mail account, they are required to have a Yahoo ID in order to use the software. It is one of the largest online calendar providers and serves millions of users.

Features

Yahoo Calendar has the following features: