HAPPENIN’ OTSEGO for SATURDAY, DECEMBER 21 Mozart Christmas Concert HOLIDAY CONCERT – 4 p.m. Wonderful works by Mozart including Missa brevis, more with The Voices of Cooperstown. Christ Episcopal Church, 46 River St., Cooperstown. 607-547-9555 or visit www.wearecooperstown.com/events/voices-of-cooperstown-concert/…