The Viljandi Folk Music Festival is a music festival in Estonia with a central focus on European folk music. It is traditionally held in late July, when the otherwise quiet city of Viljandi is completely transformed as the small city center is suddenly flooded with people. The main attraction of the festival is the friendly atmosphere. In the year 2006, over 24,000 people attended the concerts, but many more just came to take part in the festivities. As such, it is the largest annual music festival in Estonia, and one of the largest folk music festivals in Europe.