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 of Northern Rhodesia. Welensky led a move in the Legislative Council to restrict the British South Africa Company's mineral rights which garnered African support; the Company agreed in 1949 to assign 20% of its revenues to the Government, and to transfer all its remaining rights in 1986. As early as 1915, the British South Africa Company proposed amalgamating Southern Rhodesia and Northern Rhodesia, but this was rejected by the Southern Rhodesian legislature in 1917, as it might have prevented Southern Rhodesia obtaining self-government. This option was again rejected in 1921, for the same reason. After the Southern Rhodesian electorate voted