Fall and Spring Semesters: Des Plaines: Monday-Thursday 7:30 a.m.-10 p.m. Friday 7:30 a.m.-9 p.m. Saturday 9 a.m.-3 p.m. Sunday 11 a.m.-5 p.m. Ray Hartstein Campus, Skokie: Monday-Thursday 7:30 a.m.-10 p.m. Friday 7:30 a.m.-6:30 p.m. Government Documents: Monday 9:00 a.m.-5:00 p.m., Tuesday-Thursday, 9:00 a.m.-7:00 p.m, Friday 9:00 a.m.-5:00 p.m. Reference help available at Des Plaines Campus Library Reference Desk or (847) 635 - 1644. Hours are the same all year long and are not affected by the academic calendar. Summer Hours (both campuses): Monday-Thursday 7:30 a.m.-10 p.m. (closed Friday-Sunday) Hours Between Semesters (both campuses): Monday -Friday 7:30 a.m.-4 p.m.