The spirit of the Olympic Movement is coming to US Lacrosse Headquarters as part of the celebration of Olympic Day on June 30. The US Lacrosse celebration of Olympic Day is one of nearly 2,000 events taking part nationwide during the month of June. Created in 1948, Olympic Day commemorates the birth of the modern Olympic Games and celebrates sport, as well as the ideals of fair play, perseverance, respect and sportsmanship.