1. In 1903, the first automobile race in Delaware was held on May 24 at the Delaware State Fairgrounds in Harrington.

2. On May 24, 1916, the US Army opened a training camp near Wilmington as part of its preparations for World War I. The camp was named Camp DuPont in honor of the DuPont Company, which had donated the land.

3. May 24, 1937, saw the completion of the Delaware Memorial Bridge, which spans the Delaware River and connects Delaware and New Jersey.

4. In 1963, Governor Elbert Carvel signed legislation making May 24 the official date for Delaware Day, a state holiday commemorating the day in 1787 when Delaware became the first state to ratify the US Constitution.

5. On May 24, 2011, Delaware Governor Jack Markell signed into law a bill legalizing same-sex civil unions, making Delaware the eighth state to offer such legal recognition to same-sex couples.