1. The first Ohio State Constitution was adopted on April 1, 1803. After Ohio became a state on March 1, 1803, a convention was called to draft a constitution for the new state. The constitution was adopted on April 1, making Ohio the 17th state in the nation.

2. The Ohio and Erie Canal officially opened on April 1, 1834. The canal, which stretched 309 miles from Lake Erie to the Ohio River, played a crucial role in transporting goods and people throughout Ohio in the 19th century.

3. The deadliest tornado outbreak in Ohio's history occurred on April 1, 1974. As part of a larger storm system that affected multiple states, 13 tornadoes touched down in Ohio, killing 36 people and causing over $100 million in damage.

4. On April 1, 1930, the first commercial airline service began in Ohio. United Airlines established a route from Cleveland to Chicago, with stops in Detroit and Grand Rapids. The flight took just over two hours and cost $35.

5. The Ohio State Buckeyes football team won their first National Championship on April 1, 1943. Due to World War II, the Buckeyes played their entire season on the road, going 9-0 and earning the top ranking in the final Associated Press poll. They were later awarded the national championship by the National Championship Foundation.