1. On April 20, 1961, the first air-conditioned stadium in Florida opened in Miami. The Orange Bowl, which was home to the Miami Hurricanes football team, had a capacity of 75,000 and became a popular venue for major events and concerts.

2. On April 20, 1971, the Jacksonville Suns minor league baseball team played their first game at Wolfson Park. The team, which is currently affiliated with the Miami Marlins, has since moved to a new ballpark in Jacksonville.

3. On April 20, 2010, the Deepwater Horizon oil rig exploded in the Gulf of Mexico, causing the largest oil spill in U.S. history. The spill released an estimated 4.9 million barrels of crude oil into the ocean and caused significant damage to marine life and ecosystems in the region.

4. On April 20, 1986, a fire broke out at the Dupont Plaza Hotel in San Juan, Puerto Rico, which was owned by the Miami-based Dupont family. The fire killed 98 people and injured more than 140 others, making it one of the deadliest hotel fires in U.S. history.

5. On April 20, 1861, Florida became the third state to secede from the United States and join the Confederacy at the start of the American Civil War. The state played a significant role in the conflict, supplying soldiers and resources to the Confederacy and serving as a major theater of war.