20 – The restored manor house of Groot Constantia is reopened after a fire devastated it in 1925.
13 January – Sydney Brenner, biologist and Nobel Prize in Physiology or Medicine laureate, is born in Germiston, Johannesburg.
May – Philemon (Duma) Pearce Dumasile Nokwe, the first black advocate of the Supreme Court of Transvaal and politician.
10 June – Mizream Maseko, artist and Zion Christian Church deacon.
22 October – Helenard Joe Hendrickse (Allan Hendrickse) is born in Uitenhage, Cape Province.
7 January – Cape – Sunland to Kirkwood, 14 miles 54 chains (23.6 kilometres).
10 February – Transvaal – Solarvale to Mount Carmel, 2 miles 25 chains (3.7 kilometres).
27 April – Cape – Landplaas to Bitterfontein, 31 miles 63 chains (51.2 kilometres).
1 July – Transvaal – Makwassie to Vermaas, 59 miles 29 chains (95.5 kilometres).
4 July – Natal – Candover to Golela, Transvaal, 12 miles 27 chains (19.9 kilometres).
14 September – Cape – Imvani to Qamata, 26 miles 79 chains (43.4 kilometres).
1927 in South Africa Wikipedia
Seven new steam locomotive types, five Cape gauge and two narrow gauge, enter service on the South African Railways (SAR):Ten Class HF 2-8-2+2-8-2 Double Mikado type Modified Fairlie articulated steam locomotives.
Thirteen Class GCA 2-6-2+2-6-2 Double Prairie type Garratt articulated branchline locomotives.
Thirty-seven Class GF 4-6-2+2-6-4 Double Pacific type Garratt locomotives.
Ten Class U 2-6-2+2-6-2 Double Prairie type Union Garratt articulated locomotives.
In December, the first of two Class 18 2-10-2 Santa Fe type locomotives.
Two Class NG G12 2-6-2+2-6-2 Double Prairie type narrow gauge Garratt articulated locomotives. They are the smallest Garratt locomotives to see service in South Africa.
The first three Class NG G13 2-6-2+2-6-2 Double Prairie type Garratt locomotives, on the Langkloof and Alfred County Railway narrow gauge lines.