Fourth of July factoid: the legal separation of the Thirteen Colonies from Great Britain technically occurred on July 2, when the Second Continental Congress voted to approve a formal resolution of independence, which had first been suggested a month earlier.
The Declaration of Independence was hammered out two days later to explain this decision and subsequently signed July 4. Since what occurred July 2 was private, the American people saw the day that the public announcement was signed as the true day of independence — although John Adams allegedly preferred July 2 as the date. As he wrote on July 3:
The second day of July, 1776, will be the most memorable epoch in the history of America. I am apt to believe that it will be celebrated by succeeding generations as the great anniversary festival. It ought to be commemorated as the day of deliverance, by solemn acts of devotion to God Almighty. It ought to be solemnized with pomp and parade, with shows, games, sports, guns, bells, bonfires, and illuminations, from one end of this continent to the other, from this time forward forever more.
It gets more interesting: despite the claim of the Founding Fathers, many historians believe that the Declaration was actually signed nearly a month after its adoption, on August 2, 1776. Coincidentally, both John Adams and Thomas Jefferson – the only signers of the Declaration who would later serve as Presidents – died on the same day: July 4, 1826, the 50th anniversary of the Declaration (moreover, although not a signer of the document, James Madison also died on July 4).
Anyway, have a safe and happy Fourth of July.
Source: Wikipedia, Quartz