1. On June 21, 1788, Ohio became the 17th state to join the United States of America.

2. The longest day of the year, also known as the summer solstice, often falls on June 21 in the northern hemisphere. In Ohio, people can experience up to 15 hours of sunlight on this day.

3. In 1837, the Ohio female seminary in Gambier was established on June 21. This institution eventually became Kenyon College, a prestigious liberal arts college located in Gambier, Ohio.

4. On June 21, 1863, Confederate General John Hunt Morgan and his troops entered Ohio as part of a raid into the northern states during the Civil War. This raid resulted in the capture and imprisonment of Morgan and many of his men.

5. A major tornado outbreak occurred in Ohio on June 21, 1969. Thirty-seven tornadoes touched down across the state, causing extensive damage and resulting in the deaths of seven people.