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 replaced by the more radical Harry Nkumbula. Harry Nkumbula, a schoolteacher from Kitwe, had been given a scholarship to study in London, where he met Hastings Banda. The main African objections to the Federation were summed up in a joint memorandum prepared by Nkumbula for Northern Rhodesia and Banda for Nyasaland in 1950, shortly before Nkumbula returned to Northern Rhodesia. These objections were that political domination by the white minority of Southern Rhodesia would prevent greater African political participation, and that control by Southern Rhodesian politicians would lead to an extension of racial discrimination and segregation. Nkumbula returned to Northern