The historic event celebrated on July 4th in the United States is Independence Day, which commemorates the adoption of the Declaration of Independence on July 4, 1776. This day marks the formal assertion of the 13 colonies' intention to break free from British rule and establish themselves as a sovereign nation. Independence Day is celebrated with various festivities, including fireworks, parades, barbecues, and patriotic displays. It serves as a reminder of the values of liberty, self-governance, and the struggle for freedom that are central to the American identity.