1. On May 12, 1802, the Ohio General Assembly passed a law that designated the city of Chillicothe as the first capital of Ohio. It remained the capital until 1810 when it was moved to Zanesville, and then to Columbus in 1816 where it has since remained.

2. On May 12, 1812, General William Hull arrived in Dayton, Ohio, to take command of the Ohio militia during the War of 1812. Hull later surrendered to the British, becoming the first American general to surrender during the war.

3. On May 12, 1914, a fire broke out at the Cuyahoga County Courthouse in Cleveland, Ohio. The fire destroyed the courthouse and the jail. Many prisoners died, and others were injured as they tried to escape.

4. On May 12, 1936, the first roller coaster designed by John Allen, the Blue Streak at Cedar Point amusement park in Sandusky, Ohio, opened. The wooden coaster is still in operation today and is considered a classic among coaster enthusiasts.

5. On May 12, 1965, the Cleveland Indians abandoned a game against the Los Angeles Angels after fans swarmed the field in protest of a controversial umpire call. The game was later resumed from the point of interruption with no fans present, and the Indians went on to win 4-3.

These are just a few of the many events that have occurred on May 12 throughout Ohio's history.