The significance of the 4th of July in the United States lies in its commemoration of the adoption of the Declaration of Independence in 1776. This date marks the birth of the nation and its formal separation from British rule. The Declaration, primarily authored by Thomas Jefferson, articulated the colonies' desire for freedom and self-governance. Since then, the 4th of July has evolved into a national holiday celebrated with various festivities, including fireworks, parades, barbecues, and public ceremonies, reflecting American values of liberty, independence, and national pride.