National New Jersey Day is observed in the United States every July 27 to celebrate New Jersey's history and its significance as the third state to ratify the U.S. Constitution. The holiday was established by National Day Calendar as part of the National State Days project, which recognizes the unique culture and history of each state in the order they joined the Union. New Jersey, bordered by New York, Delaware, Pennsylvania, and the Atlantic Ocean, is notable for being the fifth smallest state by land area and the most densely populated. The state's history includes the Lenape tribe's dominance before European exploration, the establishment of Dutch colonial settlements, and its pivotal role during the Revolutionary War, earning it the nickname "Crossroads of the Revolution." New Jersey ratified the Constitution unanimously on December 18, 1787. Celebrations on this day often reflect on the state's rich heritage and contributions to American history.