1. On December 20, 1860, the state of Georgia was the fifth state to secede from the United States and join the Confederacy. This decision ultimately led to the start of the American Civil War.

2. On December 20, 1939, Governor Eurith D. Rivers signed the legislation creating Stone Mountain State Park, one of the most popular attractions in Georgia. The park features hiking trails, camping sites, and the world's largest relief sculpture, depicting Confederate leaders Stonewall Jackson, Robert E. Lee, and Jefferson Davis.

3. On December 20, 1956, civil rights leader Dr. Martin Luther King Jr. and other activists were arrested and indicted on charges of conspiracy to boycott public transportation in Montgomery, Alabama. This sparked a nationwide movement for African American civil rights.

4. On December 20, 1996, the Olympic Soccer Stadium in Athens, Georgia, was named as one of the venues for the 1996 Summer Olympic Games. The stadium was used for soccer matches during the games.

5. On December 20, 2017, Atlanta native Donald Glover, also known as Childish Gambino, released his hit song "Redbone." The song reached number 12 on the US Billboard Hot 100 chart and was nominated for Grammys for Record of the Year and Best R&B Song.