1. Delaware was the first state to ratify the Constitution of the United States, and December 17 marks the anniversary of this historic event. On December 17, 1787, Delaware became the first state to ratify the federal Constitution, and this event is widely celebrated as a milestone in American history.

2. On December 17, 1862, Union troops under General Alfred Terry captured Confederate Fort McAllister in Georgia during the Civil War. This victory helped pave the way for the Union's successful capture of Savannah later that month.

3. December 17, 1903, saw the birth of pioneering aviator and Delaware native Wallace "Wally" Carrothers. Carrothers was instrumental in the development of advanced aircraft materials and helped make aviation safer and more efficient.

4. Delaware's beloved Cape Henlopen State Park was formally dedicated on December 17, 1964. This picturesque park offers visitors miles of sandy beaches, woodlands, and stunning coastal landscapes.

5. December 17, 1970, saw President Richard Nixon sign the Occupational Safety and Health Act into law, providing federally-mandated protections for American workers. This landmark legislation has helped improve the safety and well-being of millions of workers, and its anniversary is commemorated each year on National OSHA Day.