5 April 1990
On 5 April 1990, at an informal meeting in Cape Town, President F.W. de Klerk and Nelson Mandela agreed to reschedule formal talks between the Government and the African National Congress (ANC). The purpose of these talks was to negotiate the adoption of a new democratic constitution for South Africa. The talks were set to take place on 11 April, however the ANC cancelled the talks after police shot and killed several anti-apartheid demonstrators in Sebokeng, a township in the southern Gauteng (then Transvaal) area, on 26 March 1990. After F.W de Klerk gave instructions for an in-depth investigation into the Sebokeng shootings, an agreement was reached between the government and the ANC. Therefore, the reconciliatory talks were rescheduled to take place from 2 to 4 May of the same year. This particular meeting was the first time de Klerk and Mandela had met since Mandela's release from prison in February 1990, and therefore a significant occasion in the negotiations that would lead to the creation of a "New South Africa".
References

Wren, C.S (1990) "Mandela and de Klerk Announce Agreement on New Date for Talks", from The New York Times, 6 April  [online] Available at www.nytimes.com [Accessed: 4 April 2014]