The 1939–40 New York World's Fair opens.

The 1939 New York World's Fair was an international exposition at Flushing Meadows–Corona Park in Queens, New York City, New York, United States. The fair included exhibitions, activities, performances, films, art, and food presented by 62 nations, 35 U.S. states and territories, and 1,400 organizations and companies. Slightly more than 45 million people attended over two seasons. It was based on "the world of tomorrow", with an opening slogan of "Dawn of a New Day". The 1,202-acre (486 ha) fairground consisted of seven color-coded zones, as well as two standalone focal exhibits. The fairground had about 375 buildings.