Geddes, N.Y. — “You can put the past away,” Stephan Jenkins sang Saturday night at the New York State Fair.
Nobody really wanted to.
Many of the adults singing Third Eye Blind songs had children dancing beside them. They had grown up hearing “Jumper,” “How’s It Going to Be” and “Semi-Charmed Life” on the radio. Now they were hearing them beneath a golden-orange moon at Suburban Park, surrounded by the lives they had built since…