Independence Day in the U.S. is better known as "the Fourth of July" or just "the Fourth".
On this day in 1776, the U.S. declared itself an independent country. Before that, it had belonged to Britain.
People in the future United States (which were then called "colonies") had already begun fighting with British soldiers. The American Revolution had started. It ended with the British surrender in 1781.
Today, Americans celebrate the birth of their country with fireworks and other special events.
Many people have the day off, and enjoy spending it with their families, often at community celebrations.
How much do you know about the Declaration of Independence? Click here to take an online quiz.