The library is closed in observence of Indigenous Peoples' Day.
Image courtesy of the Smithsonian--National Museum of the American Indian. For more information on the background and importance of Indigenous Peoples' Day, see this article from the Smithsonian Magazine.
The library is closed on all U.S. Federal holidays. The library is closed the Saturday before Memorial Day and Labor Day and the Friday and Saturday after Thanksgiving. In 2020 the library is also closed on July 3 and December 26.