Five days. Forty Bands. One Million Smiles. The third weekend in October each year, the annual Sun Valley Jazz & Music Festival celebrates a history of jazz music. Attendees from all fifty states, every Canadian province, and several foreign countries gather each October to celebrate live performances of Americaâ€™s music. The Sun Valley Jazz & Music Festival was birthed out of a love and appreciation for jazz music by Tom & Barbara Hazzard and is held mid-October each year at the Sun Valley Inn in Sun Valley, Idaho.