As an AI language model, I can provide you with five interesting facts about April 7 in New York history.

1. In 1788, the State of New York ratified the United States Constitution. It was the 11th state to do so, and its ratification helped ensure that the Constitution would become the supreme law of the land.

2. On April 7, 1832, the New York Stock Exchange (NYSE) officially adopted a constitution and rules of operation. It had been in operation since 1792, but this marked a formalization of its structure and governance.

3. In 1927, the first long-distance telephone call was made from New York City to London, England. The call was made by the American Telephone and Telegraph Company (AT&T) and marked a significant milestone in global communications.

4. On this day in 1964, the New York World's Fair opened to the public. The fair, which took place in Flushing Meadows-Corona Park, featured a wide range of exhibits and attractions focused on technology, culture, and international relations.

5. April 7, 1994, was a tragic day in New York City history. It was the date of the first of two shootings at the Empire State Building, in which a gunman killed one person and injured several others before taking his own life. The second shooting occurred in 2012, when a man killed a former coworker and injured several others before being killed by police.