In what year was the Declaration of Independence that led to the formation of the United States adopted?

The declaration of independence of the British colonial possessions on the North American continent from the mother country was adopted at the Second Congress in Philadelphia on July 4, 1776. This date is still the main holiday in the United States. Together with Thanksgiving Day, it is one of the most important national holidays of this state. This document was authored by Thomas Jefferson, the founder and 3rd President of the United States of America. This outstanding document was also signed by 56 congress participants.