The following MediaWiki extensions allow you to display a calendar within a wiki page:
- MsCalendar - displays a calendar of events, as well as a popup form to let users enter events. All event information is stored in the database, not in wiki pages.
- SimpleCalendar - displays a monthly calendar, with each day being a link to a wiki page. (No events displayed.)
- Widgets - lets you embed a Google Calendar using the Google Calendar widget.