hCalendar - Wikipedia
For details of hCalendar used on Wikipedia, see Wikipedia:Microformats.
hCalendar (short for HTML iCalendar) is a microformat standard for displaying a semantic (X)HTML representation of iCalendar-format calendar information about an event, on web pages, using HTML classes and rel attributes.
It allows parsing tools (for example other websites, or browser add-ons[1] like Firefox's Operator extension) to extract the details of the event, and display them using some other website, index or search them, or to load them into a calendar or diary program, for instance. Multiple instances can be displayed as timelines.
Consider this semi-fictional example:
The English Wikipedia was launched on 15 January 2001 with a party from 2-4pm at Jimmy Wales' house (more information).
The HTML mark-up might be:
<p> The English Wikipedia was launched on 15 January 2001 with a party from 2-4pm at Jimmy Wales' house (<a href​=​"http://en.wikipedia.org/wiki/History_of_Wikipedia"​>​more information</a>) </p>
hCalendar mark-up may be added using spanHTML elements and the classes vevent, summary, dtstart (start date), dtend (end date), location and url:

<p class="vevent"> The <span class​=​"summary"​>​English Wikipedia was launched</span> on 15 January 2001 with a party from <abbr class="dtstart" title​=​"2001-01-15T14:00:00+06:00"​>​2pm​</​abbr​>​- <abbr class="dtend" title​=​"2001-01-15T16:00:00+06:00"​>​4pm​</​abbr​> at <span class​=​"location"​>​Jimmy Wales' house</span> (<a class="url" href​=​"http://en.wikipedia.org/wiki/History_of_Wikipedia"​>​more information</a>) </p>
Note the use of the abbr element to contain the machine readable, ISO8601, date-time format for the start and end times.
Accessibility concerns
Concerns have been expressed[2] that, where it occurs, the use of the abbr element (using the so-called abbr-design-pattern) in the above manner causes accessibility problems, not least for users of screen readers and aural browsers.[3] The newer h-event microformat therefore uses the HTML5 element time instead:
<time class="dt-start" datetime=​"2013-06-30 12:00"​>​30​<sup>​th​</sup> June 2013, 12:00</time>
The Geo microformat is a part of the hCalendar specification, and is often used to include the coordinates of the event's location within an hCalendar.
For a full list of attributes, see the hCalendar cheat-sheet.
Notable organisations and other websites using hCalendar include:
  1. ^ Microformats.org: Browser Support for Microformats
  2. ^ Web Standards Project, hAccessibility: Abbreviations in Microformats
  3. ^ Microformats Wiki: Assistive Technology
  4. ^ Microformats - Birmingham City Council
  5. ^ Protalinski, Emil (2011-02-18). "Facebook adds hCalendar and hCard microformats to Events". ZDNet. Retrieved 24 March 2011.
  6. ^ Official Google Maps API Blog: Microformats in Google Maps
  7. ^ Microformats.org: Google adds support for hCalendar and hRecipe Rich Snippets
  8. ^ Google Webmaster Tools: Rich snippets - Events
  9. ^ David Storey - Microformats on Opera sites
  10. ^ a b c d e hCalendar Examples in the wild · Microformats Wiki
  11. ^ Wikipedia:Microformats
External links
hCalendar at the Microformats Wiki
Last edited on 7 January 2021, at 15:06
Content is available under CC BY-SA 3.0 unless otherwise noted.
Privacy policy
Terms of Use
HomeRandomNearbyLog inSettingsDonateAbout WikipediaDisclaimers