National Women's Day is a South African public holiday celebrated annually on 9 August. The day commemorates the 1956 march of approximately 20,000 women to the Union Buildings in Pretoria to petition against the country's pass laws that required South Africans defined as "black" under The Population Registration Act to carry an internal passport, known as a passbook, that served to maintain population segregation, control urbanisation, and manage migrant labour during the apartheid era. The first National Women's Day was celebrated on 9 August 1995. In 2006, a reenactment of the march was staged for its 50th anniversary, with many of the 1956 march veterans.

The Union Buildings form the official seat of the South African Government and also house the offices of the President of South Africa. The imposing buildings are located in Pretoria, atop Meintjeskop at the northern end of Arcadia, close to historic Church Square. The large gardens of the Buildings are nestled between Government Avenue, Vermeulen Street East, Church Street, the R104 and Blackwood Street. Fairview Avenue is a closed road through which only officials can enter the Union Buildings. Though not in the centre of Pretoria, the Union Buildings occupy the highest point of Pretoria, and constitute a South African national heritage site.