1. Nebraska State Capitol cornerstone laid (1922) - On August 12, 1922, the cornerstone for the current Nebraska State Capitol building was laid in Lincoln. The building was completed in 1932 and stands as one of the tallest buildings in Nebraska at 400 feet.

2. Nebraska's first execution (1868) - The first execution in Nebraska took place on August 12, 1868, when William H. Jackson was hung for the murder of Isaac Brown in Richardson County.

3. Nebraska's largest hailstone (2017) - On August 12, 2017, a hailstone measuring 6.3 inches in diameter fell near Sidney, Nebraska. It is the largest hailstone ever recorded in the state and was confirmed by the National Weather Service.

4. Nebraska celebrates its 150th anniversary (2017) - August 12, 2017, marked Nebraska's 150th anniversary of statehood. Various events and celebrations were held across the state to commemorate the occasion.

5. Grand Island tornado outbreak (1950) - On August 12, 1950, a tornado outbreak struck Grand Island, Nebraska, causing significant damage and claiming the lives of five people. This event led to the development of new techniques for detecting and predicting tornadoes.