1. The New York Stock Exchange Was Founded
The New York Stock Exchange (NYSE) is one of the largest and most influential stock exchanges in the world. It was founded on December 20, 1792, when a group of men signed an agreement setting up rules and regulations for securities trading in New York.

2. The Statue of Liberty Finally Arrives in New York
On December 20, 1886, the Statue of Liberty finally arrived in New York Harbor after a long journey from France. The statue was a gift from the French people to the United States, and it has since become an iconic symbol of freedom and democracy.

3. John Lennon's "Happy Xmas (War Is Over)" Was Released
On December 20, 1971, John Lennon's famous Christmas song "Happy Xmas (War Is Over)" was released in the United States. The song has since become a holiday classic, and its message of peace and goodwill resonates with people around the world.

4. The First American Performance of "The Nutcracker"
On December 20, 1954, the New York City Ballet performed the first American production of Tchaikovsky's famous ballet "The Nutcracker." Since then, "The Nutcracker" has become a beloved holiday tradition in the United States, with countless productions staged every year.

5. The Brooklyn Navy Yard Is Decommissioned
On December 20, 1966, the Brooklyn Navy Yard was officially decommissioned after over 150 years of service to the United States Navy. The naval yard had played an important role in American history, producing some of the most famous ships of the Civil War and World War II. Today, the site has been transformed into a hub of innovation and creativity, with plans to develop a technology and manufacturing center.