two of the most important in the United States are Independence Day and Thanksgiving Day . The fourth of July marks the American declaration of independence from Britain. Most towns, big or small, celebrate the fourth of July with parades and fireworks. Families celebrate with barbecues or picnics. Thanksgiving Day is celebrated in fall, on the fourth Thursday in November. It is a day when people give thanks to the harvest. Most families have a large dinner with roast turkey. Both Independence Day Thanksgiving Day are mational holidays DỊCH DÙM EM