Washington’s National Air and Space Museum opened on July 1, 1976, during the United States Bicentennial.
The museum’s building on the National Mall opened just three days before the July 4 anniversary. Its opening was deliberately timed to coincide with the nationwide celebration, giving visitors a major new institution devoted to aviation and space history.
The ceremony included figures associated with the Smithsonian and the space program. The museum’s collection connects early flight, military aviation, scientific research, and human spaceflight, making it a particularly fitting Bicentennial-era project in a year that emphasized American technological achievements.
July 1 is sometimes confused with July 4 because both dates were central to the 1976 celebrations. The museum opened on July 1; July 4 was the date of the Bicentennial anniversary itself. The building later became one of Washington’s most visited museums.