Typically the festival itself runs 6 consecutive weekends. The website or Facebook page are the best places to find out information about an upcoming season. The shows and acts are on a schedule that does not typically shift week to week during a season. People in the Shire can mark the day by the jousts and parade. Often (but I cannot guarantee because they have run out) people entering the gates are offered a printed booklet that has a guide, including a map, show times and what stage they're on, and a list of shops and food.
The website has a map of the grounds and the theme weekends. If you look on the map, it has the showtimes listed for the different stages. Hope this helps!
Visit their website or Facebook page for updated information.
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