November 29, 1977:  The opening of the Christmas season in Boston became official at the Prudential as Arthur Fiedler lead the crowd in carol singing at the sixth annual Christmas tree lighting ceremony. More than 15,000 lights decorated the 60 foot Canadian balsam fir tree, a gift to the city from the people of Nova Scotia. Dignitaries participating in the event include Mayor Kevin White, Cardinal Medeiros and Nova Scotia Premier Gerald A. Regan. In 2002, this annual gift to the city moved to the Boston Common.