What is "aardklop"

Aardklop was an annual South African arts festival held from 1998 to 2015 in the town of Potchefstroom in the North-West province of South Africa. The cultural festival incorporates predominantly Afrikaans theatre, dance, music, cabaret and visual arts, and is held in a variety of venues in and around the town. A large craft market and open-air performances also form part of the event, drawing crowds of more than 150,000 people every year. It was replaced in 2016 by the Potchefstroom-kunstefees ("Potchefstroom Arts Festival").