While a number of dates could compete for the honour, the one generally accepted as the day to celebrate Johannesburg's birthday is the 4th October. This was the date set out in President Kruger's famous Proclamation of the 8th September 1886 (repeated on the 15th September) which reads as follows (translated with our emphasis addded):
Proclamation by His Honour the State President
WHEREAS it has become apparent to the Government of the South African Republic that is desirable to proclaim the farms named DRIEFONTEIN, ELANDSFONTEIN, Southern portion of DOORNFONTEIN, TURFFONTEIN, Government farm RANTJESLAAGTE, LANGLAAGTE, PAARDEKRAAL, VOGELSTRUISFONTEIN and ROODEPOORT, all situated in Witwatersrand, district Heidelberg, as public diggings.
Therefore I, STEPHANUS JOHANNES PAULUS KRUGER, State President of the South African Republic, on the advice and with the consent of the Executive Council, in terms of section 5 of Law No. 8 of 1885, as amended, proclaim the above-named areas as a PUBLIC DIGGING in the following sequence and as from the following dates, respectively, to wit: -
The farms DRIEFONTEIN and ELANDSFONTEIN, on Monday the 20th September, 1886;
The southern portion of the farm DOORNFONTEIN and the farm TURFFONTEIN, on Monday the 27th September, 1886;
The piece of Government ground named RANTJESLAAGTE and the farm named LANGLAAGTE, on Monday the 4th October 1886;
The farms named PAARDEKRAAL, VOGELSTRUISFONTEIN and ROODEPOORT, on Monday the 11th October 1886;
Insofar as they have not been beaconed off by owners or lessees for Mijnpachtbrieven, or, under Law No. 8 of 1885, as amended, reserved...