The second Monday in October is a Japanese national holiday called Taiikunohi (Health and Sports Day) which commemorates the 1964 Tokyo Olympics opening ceremony held on October 10. Various sports events take place on this day, and traditional sports festivals called undoukai are held in many Japanese schools around this holiday. In undoukai, children are usually divided into two teams (red and white) and compete for their teams. Common events include tsunahiki (tag of war), tamaire game, kibasen (cavalry battle), creative dance, and lots more.