To celebrate Thanksgiving I looked the holiday up in the Encyclopedia of Food and Culture. I was interested to learn that the holiday was not born stateside. The encyclopedia states that Thanksgiving "arrived with the intellectual baggage of New England's Puritan colonists. Having banished the medieval roster of holidays including Christmas and saint's days, the reformers admitted only three holy days: the Sabbath, fast days, and Thanksgivings".
Intellectual baggage or not, enjoy the break. You can read about Thanksgiving and other foodstuffs and foodways in the Encyclopedia of Food and Culture. Available as an ebook from the GW libraries.