1. On April 21, 1718, the first recorded ferry service between New York and New Jersey began, connecting the towns of Perth Amboy and New York City. The ferry service continued to operate for centuries, playing a crucial role in the development of the region's economy and transportation infrastructure.

2. On April 21, 1818, the first steamship to cross the Atlantic Ocean from the United States to Europe was launched from Hoboken, New Jersey. The ship, named the SS Savannah, left Savannah, Georgia, and arrived in Liverpool, England, after a 29-day journey.

3. On April 21, 1858, the first professional baseball game was played in New Jersey. The game was held in Hoboken and featured the New York All-Stars against the Brooklyn All-Stars. The New York team won the game 22-18.

4. On April 21, 1930, the historic George Washington Bridge opened to traffic, connecting New Jersey and New York City over the Hudson River. The suspension bridge, which spans 4,760 feet, was the world's longest suspension bridge at the time of its opening.

5. On April 21, 1990, New Jersey native and comedian Joe Piscopo announced his candidacy for governor of the state, running as an independent candidate. Piscopo had previously gained fame as a cast member on Saturday Night Live and also hosted his own talk show on the radio. Despite early support, Piscopo dropped out of the race several months later.