1. On May 13, 1787, Delaware became the first state to ratify the United States Constitution. Known as the "First State," Delaware played a significant role in the founding of the country and the creation of the federal government.

2. On May 13, 1941, the DuPont Company introduced nylon stockings to the market. The innovative new material quickly became popular and revolutionized the fashion industry.

3. May 13, 1884, marks the opening of the first electric trolley system in Delaware in the city of Wilmington. The trolley system provided a new, faster mode of transportation for residents and opened up new opportunities for business and commerce.

4. On May 13, 1937, Delaware Governor Richard C. McMullen signed the bill that established Delaware State College (now Delaware State University), an important landmark for Black higher education.

5. In 2016, on May 13, a space launch from Wallops Island, Virginia was visible in the Delaware sky. The launch was a part of a NASA project to study the Earth's atmosphere and its effects on weather patterns.