World Cancer Day: The significance World Cancer Day is marked on February 4 to raise awareness of cancer and to encourage its prevention, detection, and treatment. World Cancer Day was founded by the Union for International Cancer Control (UICC) to support the goals of the World Cancer Declaration, written in 2008. The primary goal of the World Cancer Day is to significantly reduce death and illness caused by cancer by 2020. World Cancer Day is a chance to raise our collective voices in the name of improving general knowledge around cancer and dismissing misconceptions about the disease.