Which event is celebrated on July 4th in the United States?

The event celebrated on July 4th in the United States is the adoption of the Declaration of Independence. This date marks the formal approval of the document in 1776, which declared the thirteen American colonies free and independent from British rule. The Declaration, primarily authored by Thomas Jefferson, articulates the foundational principles of freedom and democracy, asserting the colonies' right to self-governance and outlining grievances against King George III.

This day is commemorated each year with various festivities, including fireworks, parades, and gatherings, emphasizing its significance in American history. The adoption of the Declaration represents a pivotal moment in the quest for individual liberties and the formation of a nation based on democratic ideals.