The HTML markup produced by this template includes an hCalendar microformat, which makes the event details parsable by computers, either acting automatically to catalogue article across Wikipedia, or via a browser tool operated by a person, to (for example) add the subject to a calendar or diary application. Within the hCalendar is a Geo microformat, which additionally makes the coordinates (latitude & longitude) parsable, so that they can be, say, looked up on a map, or downloaded to a GPS unit. For more information about the use of microformats on Wikipedia, please see the microformat project.

Dates will only be included if you use {{Start date}} or {{End date}} (use the former for single dates, but do not use any of these if the date is before 1583 CE). {{End date}} requires that a time be specified, but display of this time may be suppressed by adding |nodate=yes to the end.

To include a URL, use {{URL}}.

hCalendar uses HTML classes including:

  • attendee
  • dtend
  • dtstart
  • location
  • summary
  • url
  • vevent

Geo is produced by calling {{Coord}}, and uses HTML classes:

  • geo
  • latitude
  • longitude

Please do not rename or remove these classes nor collapse nested elements which use them.
Also, when giving coordinates, please don't be overly precise.