1. On May 10, 1731, the first Masonic Lodge opened in Delaware. St. John's Lodge No. 2 was established in Wilmington, and it continues to operate to this day, making it one of the oldest Masonic lodges in the United States.

2. May 10, 1775, Congress authorized the construction of the Continental Navy, which played a vital role in securing America's independence during the American Revolution. The Delaware River was a significant maritime highway during the war, and many Delawareans served in the Navy or as privateers.

3. On May 10, 1880, Delaware Governor John W. Hall signed a bill that established the State Board of Agriculture. This organization, which still flourishes today, exists to promote Delaware's agricultural industry, improve farming techniques, and provide vital services to farmers across the state.

4. On May 10, 1935, the magnificent DuPont Mansion in Wilmington, known as Nemours, was officially opened to the public. The French-style chateau was the former home of Alfred I. du Pont, and it is now a museum and gardens, attracting thousands of visitors each year.

5. Finally, on May 10, 1986, the new Cape May-Lewes Ferry Terminal was dedicated in Lewes, Delaware. The ferry service, which operates between Delaware and New Jersey, was started in 1964 and serves as a popular tourist attraction and an essential link between the two states. The new terminal was built to replace the original, which had been in operation for over 20 years.