1. On May 5, 1803, Ohio became the 17th state to join the United States. Initially, Ohio was part of the Northwest Territory, but as its population grew, it was granted statehood by Congress.

2. May 5, 1925, is known as "Black Tuesday" in Ohio history, as this was the day that the deadliest tornado in Ohio struck the state. The tornado hit the small town of Lorain, causing widespread destruction and killing 85 people.

3. The Kent State shootings occurred on May 4, 1970, but the aftermath continued to impact Ohio history on May 5. On this day, students at Ohio State University staged a peaceful protest against the shootings, which resulted in the Ohio National Guard using tear gas to disperse the crowd.

4. May 5, 1893, marks the opening day of the World's Columbian Exposition in Chicago. While this may not seem like an Ohio-specific fact, many notable Ohioans were involved in the design and construction of the exposition's buildings and attractions, including architect Daniel Burnham and inventor Thomas Edison.

5. Ohio is known for its vibrant arts scene, and May 5 has been the opening night of many notable performances over the years. On May 5, 2017, the Cleveland Orchestra played Beethoven's Ninth Symphony to a packed crowd at Severance Hall, while on May 5, 1998, the Broadway production of "The Lion King" opened at the Ohio Theatre in Columbus.