The 1976 Summer Olympics, officially called the Games of the XXI Olympiad (French: Les XXIes olympiques d'été), was an international multi-sport event in Montreal, Canada, in 1976, and the first Olympic Games held in Canada. Montreal was awarded the rights to the 1976 Games on May 12, 1970, at the 69th IOC Session in Amsterdam, over the bids of Moscow and Los Angeles. It was the first and, so far, only Summer Olympic Games to be held in Canada. Calgary and Vancouver later hosted the Winter Olympic Games in 1988 and 2010, respectively. Twenty-nine countries, mostly African, boycotted the Montreal Games when the International Olympic Committee (IOC) refused to ban New Zealand, after the New Zealand national rugby union team had toured South Africa earlier in 1976 in defiance of the United Nations' calls for a sporting embargo. The Soviet Union won the most gold and overall medals.