1. Arkansas Statehood: On November 20, 1861, Arkansas was officially admitted into the Confederate States of America as the ninth state. Arkansas later rejoined the United States on June 22, 1868, after the end of the Civil War.

2. Desegregation: On November 20, 1957, Judge Ronald Davies issued a ruling that allowed the integration of Little Rock Central High School in Arkansas. This decision paved the way for the famous Little Rock Nine, a group of African American students who attended the school in 1957 despite opposition from segregationists.

3. Music Legends: Arkansas has produced many famous musicians, and two of them share November 20th as their birthday. Jim Dickinson, known for his work with the Rolling Stones and Aretha Franklin, was born in Little Rock in 1941. Also born in Little Rock on November 20th, 1942, was Joe Halderman, a musician, and songwriter who played keys for Elvis Presley in the 1970s.

4. Arkansas State Capitol: The Arkansas State Capitol building was completed and dedicated on November 20, 1912. The building underwent significant renovations in the early 21st century, including a restoration of its historic facade and the addition of a visitor center.

5. The Great Arkansas Earthquake: On November 20, 1967, a magnitude 4.7 earthquake struck northeastern Arkansas, causing minor damage to buildings and roads. The tremor was part of a series of earthquakes that affected the region in late 1967 and early 1968. The largest earthquake in the series measured 5.5 on the Richter scale and occurred on December 2, 1967.