March 31st, 1951 saw the Boston Bruins travel to Toronto take on the Maple Leafs in game two of their playoff semi-final. It was a notable game because it was never decided.
The game was called at 11:45pm, after one period of overtime, with the scored locked at 1-1. The province of Ontario had a Sunday curfew, which banned sporting events on Sundays. This particular game - which of course started on Saturday - ran late due to many penalties. The play had to be halted several times to allow rink attendants to scrape the blood off of the ice.
The game was ruled a no-contest. Toronto went on to win the series four games to one.