International Olympic Committee
The IOC organises the modern Olympic Games and Youth Olympic Games, held in summer and winter, every four years. The first Summer Olympics organised by the IOC was held in Athens, Greece, in 1896; the first Winter Olympics was in Chamonix, France, in 1924. Until 1992, both Summer and Winter Olympics were held in the same year. After that year, however, the IOC shifted the Winter Olympics to the even years between Summer Games, to help space the planning of the two events from one another, and improve the financial balance of the IOC, which receives greater income on Olympic years. The first Summer Youth Olympics were in Singapore in 2010 and the first Winter Youth Olympics were held in Innsbruck in 2012.
Winter Olympic Games
In 1988, the Canadian city of Calgary hosted the first Winter Olympics to span three weekends, lasting for a total of 16 days. New events were added in ski-jumping and speed skating, while future Olympic sports curling, short track speed skating and freestyle skiing made their debut appearance as demonstration sports. The speed skating events were held indoors for the first time, on the Olympic Oval. Dutch skater Yvonne van Gennip won three gold medals and set two world records, beating skaters from the favoured East German team in every race. Her medal total was equalled by Finnish ski jumper Matti Nykänen, who won all three events in his sport. Alberto Tomba, an Italian skier, made his Olympic debut by winning both the giant slalom and slalom. East German Christa Rothenburger won the women's 1,000 metre speed skating event. Seven months later she would earn a silver in track cycling at the Summer Games in Seoul, to become the only athlete to win medals in both a Summer and Winter Olympics in the same year.