1. In 1926, the Michigan State Police was created on May 4th. It was initially formed to enforce the prohibition laws and later took over duties such as traffic enforcement and criminal investigations.

2. On May 4, 1937, Michigan saw one of the worst floods in its history when the Grand River overflowed its banks. The flood caused significant damage to infrastructure and left many homeless.

3. May 4, 1962, marks the date when Michigan's Mackinac Bridge was officially opened to traffic. The bridge spans 5 miles and connects the Upper and Lower Peninsulas of Michigan.

4. May 4th, 1937, saw the opening of the Ford Motor Company's River Rouge Plant. The massive factory complex, covering over 1,100 acres, played a significant role in American manufacturing and was once the largest industrial complex in the world.

5. In 1965, on May 4th, Ferry Hall at Northern Michigan University was dedicated to John D. Ferry, the university's first president. The building, which was originally constructed in 1956, was renovated and rededicated as a state-of-the-art learning facility.