Medical library lists Labor Day holiday hours The Library of the Health Sciences will be open these hours over the Labor Day weekend: Friday, Sept. 1, 7:30 a.m. to 5 p.m.; Saturday, Sept 2, 1 to 5 p.m.; Sunday, Sept 3, 1 to 5; Monday (Labor Day), Sept. 4, 1 p.m. to midnight. Thank you. -- April Byars, Library of the Health Sciences.