Thanksgiving day. The last Thursday in November.

Thanksgiving Day is celebrated in the USA on the fourth Thursday in November.
The first Thanksgiving was a feast shared by the Pilgrims (who had recently settled Plymouth Colony in what is now Massachusetts) and the Wampanoag Indians. They ate corn, pumpkin and wild turkeys. This feast was not repeated until more than ten years later. Thanksgiving was declared a national holiday in 1863 by President Abraham Lincoln.

On Sept. 6, 1620 the Pilgrims left Plymouth (England) for the New World on a ship called the Mayflower. They were 110 men, women and children. The voyage took 65 days. and when they arrived, the Pilgrims were afraid of the local Native American Indians. The Patuxets were a peaceful group and did not do anything bad to them.

The first winter was very hard for the Pilgrims: of the 110 Pilgrims who left England, only 50 survived. But on March 16, 1621, an Indian walked into the settlement. His name was Samoset. He soon returned with another Indian named Squanto, who could speak English and taught the Pilgrims how to plant Indian corn. The harvest in October was very successful and the Pilgrims had enough food for the winter. It was time to celebrate.

Nowadays, Thanksgiving Day in America is a time to offer thanks, of family reunions and holiday meals. A time of turkeys, pumpkin pie and Indian corn. A time of holiday parades, football games on TV and giant balloons. Nevertheless, in recent years members of the Wampanoag tribe, who believe the United States has betrayed the promises made to their ancestors, commemorate Thanksgiving as a fast day. (Teresa López)
If you want to learn more about this famous celebration, I recomend Isabel Pérez's site where you will find a lot of information and funny activities.