Chester Fritz Library lists summer hours The Chester Fritz Library will observe the following hours of operation for the summer session, May 12 through Aug. 1: Monday through Thursday, 8 a.m. to 9 p.m.; Friday, 8 a.m. to 4:30 p.m.; Saturday, closed; Sunday, 5 to 9 p.m. -- Karen Cloud, Administrative Assistant, Chester Fritz Library, karencloud@mail.und.edu, 7-2618