It celebrates freedom and commemorates the first post-apartheid elections held on that day in 1994.
The elections were the first non-racial national elections where everyone of voting age of over 18 from any race group was allowed to vote.
Previously, under the apartheid regime, non-whites had only limited rights to vote.
Apartheid 'officially' began in South Africa in 1948, but colonialism and oppression of the African majority had plagued South Africa since 1652. After decades of resistance, a stalemate between the Liberation Movement and the Apartheid government was reached in 1988.