The game will be played at TD Place, home of the CFL Ottawa Redblacks.
It will be take place almost 100 years after Ottawa and Montreal met on the NHL’s opening night of Dec. 19, 1917.
Montreal defeated the original Ottawa Senators 7-4 in that game.
This will be the third Heritage Classic appearance for the Canadiens, and the second for the Senators.
The inaugural Heritage Classic was hosted by Edmonton at Commonwealth Stadium in 2003.