It takes place each January in Park City, Utah, Salt Lake City, and at the Sundance Resort, and is the largest independent film festival in the United States. It includes competitive categories, includes documentary and dramatic films, both feature length and short films, in which awards are given, as well as out-of-competition categories for showcasing new films.
Sundance is the largest independent film festival in the US, with more than 46,660 attending in 2016. It is held in January in Park City, Salt Lake City and the Sundance Resort (a ski resort near Provo, Utah) and acts as a showcase for new work from American and international independent filmmakers.
The festival consists of competitive sections for American and international dramatic and documentary films, both feature films and short films, and a group of out-of-competition sections, including NEXT, New Frontier, Spotlight, Midnight, Premieres, and Documentary Premieres.
According to wikipedia