July 4 is the anniversary of the publication of the American colonies' declaration of independence from Great Britain in 1776.
In 1775, people in New England began fighting the British for their independence. On July 2, 1776, the Congress secretly voted for independence from Great Britain. Two days later, on July 4, 1776, the final wording of the Declaration of Independence was approved, and the document was published.
The first description of how Independence Day should be celebrated was in a letter from John Adams to his wife Abigail on July 3, 1776. He described "pomp and parade, with shows, games, sports, guns, bells, bonfires, and illuminations" throughout the United States.