Charles C. Callahan, 72, of Centereach, passed away on Tuesday June 7, 2016. Beloved husband of Patricia Callahan. Devoted father of Christopher Callahan and his wife Rosalie, Patricia D’Andraia and her husband Anthony, and Sean Callahan. Cherished grandfather of Christopher, Dominic, Jamie, Alexandra, and Toni. Caring brother of Dennis Callahan and William Johntry. Visitation Thursday 2~4 & 7~9 P.M. at the O.B. Davis Funeral Homes, 2326 Middle Country Road, Centereach. Wake Prayers Thursday 3 P.M., Knights of Columbus Service Thursday 7:30 P.M. Mass Friday 9:45 A.M., Assumption BVM RC Church. Interment Calverton National Cemetery.