1. On July 20, 1969, Iowa Senator Harold Hughes watched the historic moon landing at NASA headquarters in Houston, as he was a member of the Aviation and Space Committee.

2. In 1923, the Iowa State Fair opened on July 20, featuring events such as horse races, livestock shows, and carnival attractions.

3. On July 20, 1906, the Iowa State Board of Education passed a resolution requiring all high schools in the state to offer courses in agriculture.

4. The Grinnell College baseball team won the Iowa College Athletic Conference Championship on July 20, 1930, after defeating Simpson College 5-1.

5. Governor Kim Reynolds signed the Iowa Hemp Act into law on July 20, 2019, allowing for the cultivation and production of hemp in the state for the first time in over 50 years.