1. Delaware became a state on December 7, 1787, which is why December 21 is known as Statehood Day in Delaware. It marks the 14th anniversary of Delaware becoming the first state to ratify the U.S. Constitution.

2. Delaware played a crucial role in the Civil War, as it was a border state that remained loyal to the Union. On December 21, 1861, the 1st Delaware Infantry Regiment was organized, and it went on to fight in some of the major battles of the war.

3. On December 21, 1937, the DuPont Company unveiled the first nylon stockings. The product was an immediate success and changed the way women dressed for decades to come.

4. The University of Delaware, one of the state's largest employers and educational institutions, was founded on December 21, 1743, as the Academy of Newark. It is now a major research university with over 24,000 students.

5. Delaware has a rich musical heritage, and many famous musicians have called the state home. On December 21, 1940, legendary jazz musician Frank Sinatra performed at the Hotel du Pont in Wilmington, bringing his signature style and sound to Delaware audiences.