Why do we celebrate Human Rights Day on 21 March?

Human Rights Day is a South African public holiday that is commemorated annually on 21 March and is related to the 1960 Sharpeville Massacre.

Why do we celebrate Human Rights Day on 21 March?
Human Rights Day is a South African public holiday that is commemorated annually on 21 March and is related to the 1960 Sharpeville Massacre.