The World Table Tennis Championships are table tennis competitions sanctioned by the International Table Tennis Federation (ITTF). The World Championships have been held since 1926, biennially since 1957. Five individual events, which include men's singles, women's singles, men's doubles, women's double and mixed doubles, are currently held in odd numbered years. The World Team Table Tennis Championships, which include men's team and women's team events, were first their own competition in 2000. The Team Championships are held in even numbered years.