1. The first Ohio State Fair was held on August 20, 1850, in Cincinnati. It showcased Ohio's agriculture, industry, and art, and was attended by over 50,000 visitors. Today, the Ohio State Fair continues to be an annual event, held in Columbus.

2. On August 20, 1914, the Cleveland Indians played their first game at the newly-built League Park. The stadium, located in the Hough neighborhood of Cleveland, was a popular spot for baseball fans until it was demolished in 1951.

3. Ohio astronaut Neil Armstrong, the first person to walk on the moon, was born on August 5, 1930. However, on August 20, 1969, just a month after his historic space mission, he returned to his hometown of Wapakoneta to a hero's welcome.

4. On August 20, 1986, it was announced that the Rock and Roll Hall of Fame would be built in Cleveland, Ohio. The Hall of Fame opened to the public in 1995 and has since become one of Cleveland's top tourist attractions.

5. Ohio has a rich history of aviation, and on August 20, 1920, a group of Ohioans formed the National Air Races organization. The races, which featured some of the most famous pilots of the time, were held annually in Cleveland until 1949.