1. Missouri Becomes a State: On June 30, 1821, Missouri officially became the 24th state of the United States. It was the first state to be located entirely west of the Mississippi River, and its admission helped establish the balance of free and slave states in the country.

2. The First Successful Steamboat Voyage: On June 30, 1819, the steamboat The Independence made the first successful voyage up the Missouri River, making it to Franklin, Missouri. This event was significant in the development of transportation in Missouri and helped establish steamboats as a popular mode of transportation on the river.

3. Famous Missourians Born on June 30: Two notable Missourians were born on June 30: legendary jazz musician and bandleader Benny Goodman in 1909 in Chicago, and former U.S. Senator Jean Carnahan in 1933 in Washington D.C. Carnahan was the first woman to represent Missouri in the Senate.

4. Missouri's First Homecoming Celebration: On June 30, 1911, the University of Missouri held its first Homecoming celebration, making it one of the earliest universities in the country to establish this tradition. This event has since become an integral part of university culture across the United States.

5. Missouri Lottery Established: On June 30, 1986, Missouri established its state lottery, which has since raised millions of dollars for education in the state. The lottery has also become a popular pastime for many Missourians, with scratch-off tickets and weekly drawings for various cash prizes.