Below are 5 interesting historical events that have occurred in Florida on September 20:

1. In 1565, Spanish explorer Pedro Menéndez de Avilés founded the city of St. Augustine, the oldest continuously occupied settlement in the continental United States.

2. In 1868, the Florida Constitution was amended to allow African Americans to vote.

3. In 1962, astronaut Scott Carpenter became the second American to orbit the Earth as part of NASA's Project Mercury. He landed in the Atlantic Ocean near the Bahamas, which is part of the state of Florida.

4. In 1973, the first Shamu show was performed at SeaWorld in Orlando, Florida. The popular killer whale show has since been renamed after several controversies involving captive orca whales.

5. In 1992, Hurricane Iniki hit Florida causing devastation along the Gulf Coast. It was one of the deadliest and most destructive hurricanes of the season, causing an estimated $3 billion in losses.