Charlie McAvoy scored two goals — one coming when Boston scored three times in 70 seconds during the opening period — and the Bruins celebrated the 100th anniversary of their first NHL game with a 6-3 victory over the Montreal Canadiens on Sunday.

The Montreal Canadiens have spoiled many moments for the Bruins over the last 100 years, but they were not able to plant a bleu, blanc et rouge flag on the giant B at center ice at the end of Sunday’s Centennial Game at the Garden.

Charlie McAvoy, David Pastrnak, and Charlie Coyle scored in an eruption not long after some of Boston’s living legends, including Bobby Orr, Phil Esposito, and Ray Bourque took part in emotional pregame ceremony.