An explosion at the Washburn "A" flour mill in Minneapolis kills eighteen workers. Studies show that flour dust is highly explosive, and the company begins replacing millstones with rollers, which reduce the fire hazard and revolutionize the flour industry.

Prompted by Governor Floyd B. Olson, the Minnesota legislature passes an emergency law stopping farm foreclosure sales. The Great Depression and the dust bowl had hurt farmers throughout the nation, and they had responded to foreclosures by organizing the Farmers' Holiday, which attempted to stop the sale of farm products until prices rose.

St. Paul's Frank Boyd Park is dedicated to a "fighter for his class, his race, and his union." Born in Kansas, Boyd moved to Minnesota in 1904 and joined the Brotherhood of Sleeping Car Porters Union in 1925, rising to secretary-treasurer in the organization. Active in DFL politics, he was one of the first two African Americans to cast votes in the Electoral College, in 1944. He died on May 2, 1962.

St. Paul mayor John Prince joins the crowd on the first train trip from the capital to Minneapolis. This railroad, the St. Paul and Pacific, later became part of the Great Northern Railway.

Amherst Willoughby begins stagecoach service between St. Paul and St. Anthony.

Congress extends the area of Michigan Territory, bringing present-day Minnesota under its domain. The boundary persisted until the creation of Wisconsin Territory in 1836.

The taxicab drivers of the Twin Cities split from the International Brotherhood of Teamsters to establish their own union, the Guild of Taxi Drivers and Associated Workers.

Rudolph G."Rudy" Perpich is born in Carson Lake, near Hibbing. The Iron Ranger became one of Minnesota's most colorful governors, serving from 1976 to 1979 and 1983 to 1991. He sent National Guard troops to Austin to quell tensions during the Hormel strike in 1986, and he signed a law returning the state's drinking age to twenty-one. During his terms the state lottery was established, and education was heavily funded. He died on November 21, 1995.

Sunrayce 93 concludes in Apple Valley, near the Minnesota Zoo. The six-day race of solar-powered one-passenger cars on a route from Texas to Minnesota was a competition between engineering students from schools across the country. Activities at the finish include solar-powered boat races on Lake Nokomis.

President Dwight D. Eisenhower and Queen Elizabeth II open the St. Lawrence Seaway in an official ceremony in Montreal. The seaway connects the Great Lakes to the Atlantic Ocean, making Duluth and other lake cities international ports.