Chester Fritz Library lists summer hours The Chester Fritz Library will observe the following hours of operation for May 14 through Aug. 3: Monday through Thursday, 8 a.m. to 9 p.m.; Friday, 8 a.m. to 4:30 p.m.; Saturday, closed; and Sunday, 5 to 9 p.m. -- Karen Cloud, Administrative Assistant, Chester Fritz Library, karencloud@mail.und.edu, 7-2618