Saratoga Performing Arts Center (SPAC) is a large amphitheatre located in Saratoga Springs, New York, on the grounds of Saratoga Spa State Park. It presents summer performances of classical music, jazz, pop and rock, country, comedy, and dance. It opened on July 9, 1966, with a presentation of George Balanchine's A Midsummer Night's Dream by the New York City Ballet. The Center is the official summer home of the New York City Ballet and the Philadelphia Orchestra, both of which are in residence for two or three weeks during the summer. SPAC also serves as the common venue for high school graduations, particularly for Saratoga Springs, Burnt Hills-Ballston Lake, Shenendehowa, and Ballston Spa High Schools. Skidmore College commencement exercises also take place at the venue. Saratoga Performing Arts Center, Inc. is a non-profit charitable corporation that runs the arts center. It holds a 50-year renewable lease with the State of New York, which owns the land, theaters and buildings that comprise the center. SPAC subcontracts with Live Nation, which organizes and presents the popular music and rock concerts every summer. The income derived from the Live Nation contract goes towards supporting the classical arts presentations.