What is the origin story of American Thanksgiving?
user
The pilgrims of Plymouth Plantation held the first Thanksgiving in the autumn of 1621.  Historians and storytellers often call this first Thanksgiving a "feast of thanksgiving," because the Pilgrims celebrated a success they had met with while exploring America.  The 1621 feast was originally intended to be a thanksgiving to God for their good fortune at exploring and finding a new homeland.  The pilgrims didn't think of the event as an official holiday, so no one has any record of them calling the event anything other than a feast.
assistant
When did it become an official holiday?
user
First it became an official holiday in 1777 in Philadelphia, Pennsylvania.  Then it became a national holiday in 1863 in the middle of the Civil War.  For the first time, the holiday was celebrated on the same day in all states and cities in the country.
assistant
How do Americans celebrate Thanksgiving in the modern age?
user
By sitting down with family and friends to eat a large meal together and celebrate.  In some parts of the world people also observe traditional activities like playing football.
assistant
What kinds of foods are served at a traditional Thanksgiving these days?
user
Thanksgiving foods vary from family to family, but usually include turkey and cranberry sauce, and it is very common to have mashed potatoes, sweet potatoes, corn, green bean casserole, and macaroni and cheese.  The traditional dessert of Thanksgiving is pumpkin pie.
assistant
What is the origin story of American Thanksgiving?
user
The pilgrims of Plymouth Plantation held the first Thanksgiving in the autumn of 1621.  Historians and storytellers often call this first Thanksgiving a "feast of thanksgiving," because the Pilgrims celebrated a success they had met with while exploring America.  The 1621 feast was originally intended to be a thanksgiving to God for their good fortune at exploring and finding a new homeland.  The pilgrims didn't think of the event as an official holiday, so no one has any record of them calling the event anything other than a feast.
assistant
When did it become an official holiday?
user
First it became an official holiday in 1777 in Philadelphia, Pennsylvania.  Then it became a national holiday in 1863 in the middle of the Civil War.  For the first time, the holiday was celebrated on the same day in all states and cities in the country.
assistant
How do Americans celebrate Thanksgiving in the modern age?
user
By sitting down with family and friends to eat a large meal together and celebrate.  In some parts of the world people also observe traditional activities like playing football.
assistant
What kinds of foods are served at a traditional Thanksgiving these days?
user
Most Americans eat large meals with turkey and other traditional Thanksgiving foods.  In many parts of the world, turkeys are being replaced by ducks.  The Canadian Thanksgiving has changed over the years, and instead of turkey now typically involves goose.
assistant
What is the origin story of American Thanksgiving?