1. The Michigan State Capitol building originally opened on May 3, 1879. The building, located in downtown Lansing, serves as the home of the Michigan Legislature and the offices of the Governor, Lieutenant Governor, Secretary of State, and Attorney General.

2. On May 3, 1909, legendary business tycoon Henry Ford incorporated the Ford Motor Company in Michigan. The company went on to become one of the world's largest automakers and played a significant role in the development of Michigan's economy.

3. In 1940, the Mackinac Bridge Authority was created on May 3 to plan and oversee the construction of the Mackinac Bridge, which spans the Straits of Mackinac to connect Michigan's Upper and Lower Peninsulas. The bridge, which was completed in 1957, is one of the state's most iconic landmarks.

4. On May 3, 1980, the Wharton Center for Performing Arts opened on the campus of Michigan State University in East Lansing. The venue, which features concert halls, theaters, and exhibition spaces, has hosted some of the world's most renowned performers and productions over the years.

5. May 3, 2000, was designated as Michigan Saves Energy Efficiency Day by Governor John Engler. The initiative aimed to promote energy conservation and efficiency throughout the state, and to encourage residents and businesses to take steps to reduce their energy usage and lower their utility bills.