Ivy Matsepe-Casaburri, South African politician (died 2009)

Ivy Florence Matsepe-Casaburri was a South African politician. She was the 2nd premier of the Free State and South Africa's Minister of Communications from 1999 until her death. She served briefly as South Africa's acting president in 2005, when both President Thabo Mbeki and the deputy president were outside the country. Furthermore, she was chosen by the cabinet to be the constitutional and official head of state in an interim capacity for 14 hours on 25 September 2008, between the resignation of Thabo Mbeki and the taking of office by Kgalema Motlanthe. She was the first woman to have held the post of president in South Africa and the first woman to be head of state of South Africa since Elizabeth II's reign as Queen of South Africa ended in 1961. She remained the only woman with this distinction until July 2021, when Angie Motshekga was appointed acting president.

September 18 is the 261st day of the year in the Gregorian calendar; 104 days remain until the end of the year.