1. The first major auto race in Michigan occurred on July 30, 1895, in Grosse Pointe. The race was organized by the Detroit Driving Club and featured 10 cars racing on a 10-mile track. The winner of the race was Charles Black, who completed the course in just over an hour at an average speed of 7.4 miles per hour.

2. On July 30, 1937, the Mackinac Bridge Authority was established. The bridge, which connects the Upper and Lower Peninsulas of Michigan, is one of the longest suspension bridges in the world and was completed in 1957. The bridge has become a symbol of Michigan and is a major tourist attraction.

3. The Michigan State Fair, one of the oldest and largest state fairs in the United States, has been held on July 30 several times throughout its history. The fair began in 1849 and was originally held in Detroit. Today, the Michigan State Fair is held in Novi and features agricultural exhibits, carnival rides, and live entertainment.

4. On July 30, 1975, former Teamster leader Jimmy Hoffa disappeared from a Detroit-area restaurant. Hoffa, who was serving a 13-year prison sentence for previous convictions, was meeting with two men, neither of whom was ever identified, when he went missing. Hoffa's disappearance remains one of the most famous unsolved mysteries in American history.

5. The Detroit Tigers baseball team set a Major League Baseball record for the most strikeouts in a single game on July 30, 2017. The team struck out 24 times in a 3-2 loss to the Seattle Mariners. While the loss was disappointing for the Tigers, the game will always be remembered as a unique and record-breaking performance.