Rensselaerville town-wide picnic on from 2 to 4:30 p.m. at the Bayard Elsbree Park, Route 145, Preston Hollow to celebrate the unity of its five hamlets: Cooksburg, Medusa, Preston Hollow, Potter Hollow and Rensselaerville. Last name begins with A-M are asked to bring a salad; those whose last name begins with N-Z a dessert.