. Why is Canadian and American Thanksgiving on different days. In order to break up the holidays Thanksgiving was placed in October between the two holidays Labour Day and Remembrance day. The turkey tradition began much earlier in Canada. Source: pinterest.com Today Canadian Thanksgiving is held on the second Monday of October every year or at least it has been since Canadian Parliament declared it so on January 00 0000. Thanksgiving is actually an ancient northern European tradition - Harvest Home. Americans generally believe that their Thanksgiving is modeled on a 0000 harvest feast shared by the English colonists Pilgrims of Plymouth and the Wampanoag people. Why doesnt Canada celebrate Thanksgiving the same day as the United States. So the entire world does not celebrate Thanksgiving and even those that do frequently celebrate on different dates than the United States. 