Yes, today is Thanksgiving Monday in Canada. It is a federal statutory holiday. Government offices, banks, and most businesses are shut down for the holiday. That includes Toronto and Ottawa. Retailers are open on varying schedules, so confirm hours before leaving home.
In the United States, today is Columbus Day, also a federal holiday. Some states mark it as Indigenous Peoples Day instead. U.S. stock markets and many banks are open today, but hours may be cut short.