Public holidays in Rhodesia weekend". Shangani Day was replaced as a public holiday by Occupation Day in 1920, but continued to be unofficially marked thereafter. Occupation Day, held on 12 September each year, marked the anniversary of the arrival of the Pioneer Column at Fort Salisbury in 1890, and their raising of the Union Jack on the kopje overlooking the site. It was renamed Pioneers' Day in 1961. Southern Rhodesia effectively became the entirety of Rhodesia in 1964 when Northern Rhodesia became independent as Zambia. After Southern Rhodesia's colonial government unilaterally declared independence from Britain on 11 November 1965, the anniversary became celebrated as
Northern Rhodesia Ila and plateau Tonga peoples, but the United National Independence Party was dominant elsewhere. Roy Welensky, a Northern Rhodesian settler who was the Federal Prime Minister from November 1956 had convinced Alan Lennox-Boyd, Colonial Secretary from 1954 to 1959, to support Federation and to agree that the pace of African advancement would be gradual. This remained the view of the British cabinet under Harold Macmillan until after the declaration of the States of emergency, when it decided to set up a Royal Commission on the future of the Federation of Rhodesia and Nyasaland to be held in 1960. This became