The UCI Cyclo-cross World Championships are the world championships for cyclo-cross organised by the Union Cycliste Internationale (UCI). Starting in 2022, seven events are organized each year – men's elite, women's elite, men's under 23, women's under 23, men's under 18, women's under 18 and a Mixed team relay event. Traditionally, the elite events are held on a Sunday with the other events held on the Saturday the day before.