1. In 1788, New York became the first state to ratify the U.S. Constitution, paving the way for the creation of the United States government. The city celebrated with parades and fireworks.

2. In 1857, the first commercial elevator was installed in New York City by Elisha Otis. The invention revolutionized the way buildings were constructed and paved the way for skyscrapers.

3. In 1913, the Brooklyn Dodgers signed their first African American player, Jackie Robinson. Robinson broke the color barrier in baseball and went on to become one of the greatest players in history.

4. In 1964, the Beatles made their first U.S. appearance on "The Ed Sullivan Show" at the CBS television studio on 53rd Street in New York City. The performance is credited with launching the British invasion of the American music scene.

5. In 2007, Apple CEO Steve Jobs announced the iPhone at the Macworld convention in San Francisco. The device would go on to revolutionize the mobile phone industry and change the world of technology forever. However, The release of the iPhone also had a significant impact on New York City, as it helped to spur the growth of the city's tech sector.