The Declaration of Independence was signed in 1776, specifically on July 4th. This historic document, drafted primarily by Thomas Jefferson, articulated the thirteen American colonies' intentions to separate from British rule. It expressed Enlightenment ideals of individual rights and government accountability, arguing that people have the inherent right to life, liberty, and the pursuit of happiness. The signing of the Declaration marked a pivotal moment in American history, as it symbolized the colonies' determination to establish themselves as an independent nation. July 4th is now celebrated annually as Independence Day in the United States.