1. On September 2, 1850, the first state fair was held in Janesville, Wisconsin. The event featured livestock exhibits, agricultural displays, and live music. It has since become an annual tradition in Wisconsin and is now held in West Allis.

2. In 1900, the first automobile was registered in Wisconsin on September 2. The car was owned by Milwaukee businessman Thomas Jeffery, who later founded the Rambler automobile company.

3. On September 2, 1941, the U.S. Cartridge Company plant in Baraboo, Wisconsin, exploded, killing ten workers and injuring dozens more. The plant was producing ammunition for the military at the time.

4. In 1972, a major environmental disaster occurred on September 2 when a dam at the Kaiser Aluminum plant in Trempealeau, Wisconsin, failed. The resulting floodwaters released more than 1.5 million gallons of toxic waste into the surrounding area.

5. September 2, 2018, was a historic day for Wisconsin sports as both the Green Bay Packers and Milwaukee Brewers won their respective opening games of the NFL and MLB seasons. The Packers beat the Chicago Bears in a dramatic comeback while the Brewers defeated the Washington Nationals.