1. Indiana became a state on July 21, 1816, which is now celebrated annually as Statehood Day. The Hoosier State was the 19th state to be admitted to the United States and was also the first state located entirely west of the Appalachian Mountains.

2. On July 21, 1972, the Indianapolis Motor Speedway hosted the first ever United States Grand Prix Formula One race. The event attracted over 110,000 spectators and was won by American driver Mark Donohue.

3. On July 21, 1930, police in Hammond, Indiana, arrested notorious gangster John Dillinger. Dillinger, who was on the FBI's most wanted list, had robbed several banks and escaped from jail multiple times before he was finally apprehended in Indiana.

4. In 1969, the first moon landing took place on July 21, and the event was celebrated across the country, including in Indiana. The state played an important role in the Apollo space program, with many of the astronauts training at the Purdue University in West Lafayette.

5. On July 21, 2007, the Indianapolis Colts unveiled their new stadium, Lucas Oil Stadium. The state-of-the-art facility, which cost over $700 million to build, has a retractable roof and seats over 70,000 fans. It has played host to several major events, including the 2012 Super Bowl.