What are holidays that only Americans celebrate?

Holidays unique to the United States include Thanksgiving, celebrated on the fourth Thursday in November, which commemorates the harvest feast of 1621 between Pilgrims and Native Americans. Another distinctive holiday is Independence Day, marked on July 4th, celebrating the adoption of the Declaration of Independence in 1776. Memorial Day, observed on the last Monday in May, honors military personnel who have died in service, while Labor Day, celebrated on the first Monday in September, recognizes the contributions of American workers.