Ice hockey is mostly a winter sport, however there are few summer leagues. In fact, the only time when ice hockey is played in the summer is when an outdoor game is being held as part of a larger sports festival or event. The best-known example is probably the NHL's Centennial Classic, which was played on January 1st, 2016 at BC Place in Vancouver to celebrate 100 years of NHL hockey in Canada. There were actually two such games that year: one between the Toronto Maple Leafs and Boston Bruins and another between the Chicago Blackhawks and Pittsburgh Penguins. The first season of what is now known as Major League Soccer (MLS) started on October 10th, 1996. At that time, it was simply called "America's Game". The MLS Cup has been played every year since its inception except for 2001 when it was cancelled due to the September 11th attacks. This annual tournament is the championship series of MLS and determines the winner of the MLS Cup. The MLS Cup is played on the day before Thanksgiving (usually on Wednesday), so that most Americans can attend. If you ask any soccer fan which league is better, they will usually say that MLS is the best in America.