1. On April 12, 1876, the first train arrived in Des Moines, Iowa, marking a significant moment in the city's history. The train allowed for increased transportation of goods and people, which helped Des Moines become a more prominent center of commerce and industry.

2. On April 12, 1924, the University of Iowa dedicated its new football stadium, which was named after legendary coach Howard Jones. The stadium, which is still in use today, has hosted many memorable sporting events over the years, including the 1959 Rose Bowl.

3. April 12, 1959, saw the completion of the Saylorville Dam near Des Moines. The dam, which was built on the Des Moines River, provides flood control and helps to regulate the river's flow. It also creates Saylorville Lake, which is a popular spot for boating, fishing, and other recreational activities.

4. On April 12, 1995, a tornado struck the town of Nichols, Iowa, causing significant damage and destroying many homes and businesses. The tornado was part of a larger outbreak that affected several states in the Midwest, causing millions of dollars in damage.

5. April 12, 2012, was a momentous day for Iowa's LGBT community, as the state Supreme Court ruled that same-sex couples have the right to marry. The ruling made Iowa the third state in the nation to legalize same-sex marriage, and sparked a national conversation about the issue.