Monday through Saturday from 10:00 a.m. to 5:00 p.m.
Sunday from 1:00 p.m. to 5:00 p.m.

The museums are closed on the observance of national holidays as follows:

Independence Day - Wednesday, July 4, 2007
Labor Day - Monday, Sept. 3, 2007
Columbus Day - Monday, Oct. 8, 2007
Veteran's Day - Monday, Nov. 12 (observed)
Thanksgiving Thursday, Nov. 22, 2007
Christmas Eve day Monday, Dec. 24, 2007 (observed)
Christmas Day Tuesday, Dec. 25, 2007
New Year's Eve - Monday, December 31, 2007
New Year's Day Tuesday, Jan. 1, 2008
Martin Luther King Jr. Day - Monday, January 21, 2008
President's Day - Monday, February 18, 2008
Memorial Day - Monday, May 26, 2008

Study Rooms are open to the public, with paid admission, without appointment at the following times:

The Agnes Mongan Center for the Study of Prints Drawings and Photographs is open to the public Tuesday - Friday 2:00 p.m. to 4:45 p.m. and on Saturdays, September through May, 10:00 a.m. - 12:45 p.m.

The Busch-Reisinger Museum study room is open to the public Tuesday - Friday 2:00 p.m. to 4:45 p.m.

The study rooms are closed when the museums are closed, plus the day after Thanksgiving and the week between Christmas and New Years.