Mr. and Mrs. John Slifka of Buffalo celebrated their 60th wedding anniversary with a family dinner. Mr. Slifka and the former Rosemary DiChristopher were married April 30, 1955, in St. Thomas Aquinas Church. He is a retired chemical operator at Allied Chemical. She is a retired floral designer at Karns Flower Shop. They have two children, five grandchildren and two great-grandchildren.