1. On April 13, 1946, the Indianapolis Motor Speedway reopened for racing after World War II. The first event held was a midget car race won by Duke Nalon.
2. On April 13, 1957, the Indiana State Museum was established by the Indiana General Assembly. It is the official museum of the state of Indiana and features exhibits on Indiana's art, science, and culture.
3. On April 13, 1963, the Indiana University School of Dentistry opened its doors to the first class of students. Today, it is one of the top dental schools in the country.
4. On April 13, 1968, the Indiana Pacers played their first game as a member of the American Basketball Association. The team would go on to win three ABA championships before joining the NBA in 1976.
5. On April 13, 2014, the Butler Bulldogs men's basketball team announced the hiring of Chris Holtmann as head coach. Holtmann led the Bulldogs to two NCAA Tournament appearances before leaving for Ohio State in 2017.