1. Memorial Day: May 25 is often associated with Memorial Day, a federal holiday observed on the last Monday of May to honor and mourn the military personnel who have died while serving in the United States Armed Forces. Many communities throughout Indiana hold parades, ceremonies, and other events to commemorate this day.

2. Indianapolis 500: May 25 is also the date when the Indianapolis 500, one of the world's most prestigious car races, is traditionally held. The race takes place at the Indianapolis Motor Speedway and attracts thousands of visitors from around the globe.

3. Indiana Statehood: May 25, 1816, marks the day when Indiana became the 19th state to join the United States. The state's name derives from the native Indian tribes that once inhabited the region.

4. Orville Redenbacher: The famous popcorn entrepreneur and Indiana native, Orville Redenbacher, was born on May 25, 1907. He started his popcorn business in the 1960s and quickly gained national recognition with his unique marketing approach and quality product. Today, his popcorn is still a popular snack worldwide.

5. Hoosier Basketball: On May 25, 1979, the Indiana State University men's basketball team, led by Larry Bird, played against Michigan State in the NCAA National Championship game. Although the Sycamores lost to the Spartans, Bird's performance helped put Indiana on the map as a basketball powerhouse. Today, Indiana remains a hotbed for basketball talent with high school and college teams regularly producing top-tier players.