1. In 1923, the first Macy's department store in Minnesota opened its doors in downtown Minneapolis. Today, the building is still a local landmark and a popular shopping destination.

2. On May 9th, 1956, the Minneapolis Lakers won their second consecutive NBA championship by defeating the Fort Wayne Pistons in seven games. Hall of Famer George Mikan played a key role in the team's victory, scoring 40 points in the deciding game.

3. In 1970, Minnesota's first Earth Day celebration took place on May 9th. The event was held on the University of Minnesota campus and featured speeches, music, and demonstrations focused on environmental issues.

4. Minneapolis-St. Paul International Airport opened on May 9th, 1960. The airport has since grown to become one of the busiest in the country, serving over 38 million passengers in 2019.

5. On May 9th, 1990, the Minnesota Twins set a major league baseball record by turning two triple plays in the same game. The Twins defeated the Boston Red Sox by a score of 1-0, with both triple plays occurring in the fourth inning.