1. In 1775, George Washington was appointed Commander-in-Chief of the Continental Army by the Second Continental Congress, marking a significant moment in the American Revolution.

2. In 1835, the Great Fire of New York City broke out on June 15, destroying over 600 buildings in Lower Manhattan and causing millions of dollars in damage.

3. In 1904, the first underground subway line in New York City opened, running from City Hall to Harlem.

4. In 1926, the Chrysler Building, one of the most iconic skyscrapers in New York City, was completed and officially opened to the public.

5. In 1964, the World's Fair opened in Flushing Meadows, Queens, featuring exhibits from over 80 countries and famous attractions such as the Unisphere and the New York State Pavilion.