ENGAGED -- Mr. and Mrs. Daniel Jackson of Washburn announce the engagement of their only daughter, Barbara Ann, to Keith L. Day, Son of Mr. and Mrs. Ray M. Day also of Washburn. Miss Jackson is a member of the senior class at Washburn High school. Mr. Day graduated from Washburn High school in 1944 and served two years in the Seabees. He is now a junior at the University of Maine where he is a member of Phi Eta Kappa fraternity. A late summer wedding is planned.