South Africa celebrates the 20th anniversary of its first ever all-race, democratic general election that put an end to apartheid, a system of racial segregation enforced in the country from 1948 to 1994, a report said. South Africa's first black majority leader Nelson Mandela fought the regime of discrimination most of his life. April 27 has been celebrated as a national holiday in South Africa, named Freedom Day, since 1994, RT reported.