Thanksgiving is a federal holiday in the United States celebrated on the fourth Thursday of November. The earliest Thanksgiving can occur is November 22; the latest is November 28. Outside the United States, it is called American Thanksgiving to distinguish it from the Canadian holiday of the same name and related celebrations in other regions. As the name implies, the holiday generally revolves around giving thanks and the centerpiece of most celebrations is a Thanksgiving dinner with family and friends.
Read more on Wikipedia