In the United States, Thanksgiving (which falls on the fourth Thursday in November) was proclaimed a national holiday by President Abraham Lincoln in 1863. Thanksgiving commemorates the 'First Thanksgiving', when the 17th century English pilgrims gave thanks to God for surviving their first New England winter. Turkey is traditionally eaten as part of a Thanksgiving meal because it was eaten by the Pilgrims who settled in Plymouth, Massachusetts. Turkeys gained their name from the first Europeans in the United States incorrectly identifying the birds as a variety of guinea fowl called 'turkey fowl' on account of their importation to Central Europe through Turkey. They are in fact classified as Galliformes and are relatives of the grouse.