The HFStival is an annual rock festival sponsore by Washington, D.C. / Baltimore, Maryland radio station WHFS. Currently in its seventeenth year, the HFStival is the largest yearly music festival on the East Coast. 55,000 to 90,000 people attend the annual event, which had traditionally been held at RFK Stadium until the station moved to Baltimore in 2005. That May, the new WHFS at 105.7 held its first HFStival at M&T Bank Stadium. Though not originally called HFStival, two earlier concerts held on the Fourth of July were the foundation for the first festival and are considered part of HFStival history.