Downtown Silver Spring hosts several entertainment, musical, and ethnic festivals, the most notable of which are the Silverdocs documentary film festival held each June and hosted by Discovery Communications and the American Film Institute, as well as the annual Thanksgiving Day Parade (Saturday before Thanksgiving) for Montgomery County. The Silver Spring Jazz Festival has become the biggest event of the year drawing 20,000 people to the free festival held on the second Saturday in September. Featuring local jazz artists and a battle of high school bands, the Silver Spring Jazz Festival has featured such jazz greats as Wynton Marsalis, Arturo Sandoval, Sérgio Mendes, Aaron Neville and such bands as the Mingus Big Band and the Fred Wesley Group.