Adventure Calendar

The  — originally launched under the name Advent Calendar in 2006, then modified to Adventure Calendars therefter — were a standard holiday feature of the official BBC Doctor Who website. Like an actual Advent calendar, the Adventure Calendars offered a new "treat" for fans every day from the first of December through to Christmas. They were used to ignite interest in the then-upcoming Christmas Special. Among the treats offered were things like games, desktop wallpapers, trailers, music clips and videos. Though most of the treats directly supported the Christmas special, sometimes they were reminders of the series that had been broadcast earlier in that year.

The calendars persisted on the website long after their particular Christmas had passed. As of June 2010, all elements of all calendars were still viewable in the official site's archives.