Thanksgiving Day is a holiday celebrated primarily in the United States and Canada. Traditionally, it has been a time to give thanks to God.

Currently, in Canada, Thanksgiving is celebrated on the second Monday of October and in the United States, it is celebrated on the fourth Thursday of November. Thanksgiving in Canada falls on the same day as Columbus Day    in the United States.

The full version of the info, is in this link:

http://en.wikipedia.org/wiki/Thanksgiving