Final answer:
Saint Jean Baptiste Day is unique to Québec and is a celebration of the province's Francophone culture and heritage, occurring annually on June 24th.
Step-by-step explanation:
Among the options given, Saint Jean Baptiste Day is unique to Québec. Saint Jean Baptiste Day, also known as La Fête Nationale du Québec, is celebrated on June 24th and is a public holiday in the province of Québec. This holiday honors the patron saint of French Canadians, Saint John the Baptist, and is marked with parades, concerts, and various cultural events. It is a symbol of Francophone pride and cultural heritage.
The other listed holidays - Thanksgiving, Christmas, and Independence Day - are widely observed in other parts of Canada and the United States, making them not unique to Québec.