1. Caesar Rodney's Birthday - April 14 marks the birth of Caesar Rodney, one of Delaware's most revered patriots. He was a signer of the Declaration of Independence from Delaware and was known for riding 80 miles on horseback through a thunderstorm to cast his crucial vote in Philadelphia.

2. Great Fire of Wilmington - In 1874, a massive fire destroyed nearly the entire business district of Wilmington, Delaware. The fire started on the evening of April 14 and raged for over nine hours, leaving many homeless and causing millions in damages.

3. University of Delaware's Founding - On April 14, 1743, the Trustees of the Academy of Newark, a school for "young gentlemen," received a charter from the Delaware Colony to establish what would eventually become the University of Delaware.

4. Dover Air Force Base Established - In 1941, construction began on a new Army Air Corps base near Dover, Delaware. The base was officially established on April 14, 1943, and was later renamed Dover Air Force Base. Today, it remains a critical installation for military airlift operations.

5. First Official Earth Day Celebration - On April 14, 1970, the first official Earth Day celebration was held, organized by Senator Gaylord Nelson of Wisconsin. Across Delaware, and the United States, millions participated in rallies, speeches, and educational events promoting environmental consciousness and activism.