25 May 1944
This day in history marks the first time the term Apartheid was mentioned in Parliament by Dr Malan. For Dr Malan, Apartheid was a practice and an ideology to ensure the safety of the White race and of Christian civilisation by the maintenance of principles of separate development. Apartheid as a term soon gained currency, going untranslated into the English political terminology. 
References

La Guma, Alex: (1971) Apartheid; a collection of writings on South African racism by South Africans. Intl Pub.