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Museums extend their hours on certain dates as noted on the calendar below.
NASM (National Air and Space Museum)
NMAAHC (National Museum of African American History and Culture: TIMED PASSES REQUIRED)
NMAH (National Museum of American History)
NMNH (National Museum of Natural History Museum)
UHC (National Air and Space Museum Udvar-Hazy Center)
Note: The American Art Museum and Portrait Gallery are open every evening until 7 p.m.