Regular Hours:- 1st Street and Independence Avenue, SE, DC. Open: Monday through Saturday, 10:00 a.m. to 5:30 p.m. One hour tours, Monday through Friday, at 10:30 a.m., 11:30 a.m., 1:30 p.m., 2:30 p.m., and 3:30 p.m., and Saturday at 10:30 a.m., 11:30 a.m., 1:30 p.m., and 2:30 p.m. Call on day of tour to confirm times. 202-707-8000.