Independence Day

Independence Day is a federal holiday in the United States commemorating the Declaration of Independence on July 4, 1776. The Continental Congress declared that the thirteen American colonies were no longer subject to the monarch of Britain, King George III, and were now united, free, and independent states. The Congress had voted to declare independence two days earlier, on July 2, but it was not declared until July 4.

Additional information
https://en.wikipedia.org/wiki/Independence_Day_(United_States)