HAPPENIN’ OTSEGO for SUNDAY, JUNE 26 Springfield Appreciation Concert APPRECIATION CONCERT – 4 p.m. Glimmerglass Festival to hold a season preview concert to appreciate the Springfield Community. Listen to some highlights from the coming opera season. Proceeds benefit the Springfield 4th of July Parade. Tickets, $5/person available from the Convenience Corner Store at US-20 and St. Rt. 80 in Springfield or at the Cooperstown Chamber of Commerce, Cooperstown. Held at the Alice Busch Opera Theater, 7300 St. Rt. 80, Cooperstown. 607-547-2255…