1. On March 20, 1774, the New Jersey Gazette advertised the sale of "about 600 acres of land, situate in Sussex County, near the mines." The mines referred to are likely the iron mines that once operated in the area.

2. March 20, 1852, marks the birth of William H. Wiley, who would go on to become a prominent businessman and philanthropist in New Jersey. Wiley donated generously to his alma mater, Princeton University, and the town of Swarthmore, Pennsylvania, where he lived later in life, named a park after him.

3. In 1925, March 20 marked the opening of the Meadowlands Racetrack in East Rutherford, New Jersey. The track, which offers both harness and thoroughbred racing, has since become a major attraction for sports fans and gamblers alike.

4. On March 20, 1969, the New Jersey Supreme Court ruled that the state's ban on interracial marriage was unconstitutional. This landmark decision paved the way for couples of all races to marry and helped to end legalized discrimination in the state.

5. March 20, 1995, saw the opening of the Liberty Science Center in Jersey City, New Jersey. The museum, which offers interactive exhibits on topics ranging from the environment to physics to technology, has won multiple awards and has become a staple of the New Jersey cultural scene.