1. Kansas Statehood Day: On August 20, 1861, Kansas was officially declared the 34th state of the United States. This day is celebrated as Statehood Day in Kansas.

2. First Woman Mayor: In 1887, Susan Madora Salter became the first woman in the United States to be elected as a mayor. She was elected as the mayor of Argonia, a small town in Kansas, on August 20, 1887.

3. The Great Bend Air Crash: On August 20, 1930, a United Airlines Boeing 727 crashed near Great Bend, Kansas, killing 12 of the 14 people on board. It was one of the deadliest airplane accidents in the United States at that time.

4. Sunflower State Games: The Sunflower State Games, a multi-sport event held annually in Kansas, were first held on August 20, 1990. The event attracts thousands of athletes from across Kansas and neighboring states.

5. Famous Birthdays: August 20 is the birth date of several famous Kansans, including baseball player Joe Tinker (1880), astronaut Joe Engle (1932), and comedian Kevin Willmott (1959).