1. On May 12, 1902, the Osage Nation in Oklahoma negotiated what would become one of the largest oil and gas leases ever granted to a Native American tribe. The lease covered over a million acres of tribal land, leading to enormous wealth and affluence for the Osage people.

2. May 12, 1934 marked the official end of prohibition in Oklahoma, two years before it was repealed across the country. With the state now able to legally sell and consume alcohol, bars and breweries popped up across Oklahoma.

3. In 1969, May 12 became the date of one of the worst tornado outbreaks in Oklahoma history. 27 tornadoes touched down across the state that day, resulting in 51 deaths and over 500 injuries. The town of Norman was particularly hard hit, with a tornado measuring nearly a mile wide causing widespread destruction.

4. May 12, 1971 saw the opening of the Tulsa State Fairgrounds, a sprawling complex of exhibition halls, arenas, and outdoor spaces that has become a major cultural and economic hub for the city of Tulsa.

5. On May 12, 1983, a massive explosion at a fireworks warehouse in Midwest City, Oklahoma killed one person and injured dozens more. The blast was felt for miles around, and caused extensive property damage in the surrounding area.