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 Bruins (11-11-3) will celebrate their 100th anniversary in a Centennial game against the Canadiens (8-12-3), one of their oldest rivals, at TD Garden. It will be played 100 years to the day Boston played its first NHL game against the Montreal Maroons on Dec.

The Canadiens are the second-youngest team in the NHL. This we have acknowledged many times since the season started. But after beating themselves once again on Sunday, the Canadiens did nothing to undo the perception that they’re not just young,