Ambiguity, thou art Canadian.
The American's have a very clear history when it comes to their Thanksgiving celebration. As a child growing up in Canada, the American version was what we learned. It seemed even the education system could not adequately explain why the Canadian celebration existed, let alone why it was in October. Those interested will find a wiki article here.
For myself, I was happy to enjoy a day with my family, cook a massive dinner, eat too much dessert, and oh yes, do dishes.