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 mining was booming. When Northern Rhodesia became a Protectorate under the British Empire on 1 April 1924, a Legislative Council was established on which the Governor of Northern Rhodesia sat "ex officio" as Presiding Officer. The initial council consisted entirely of nominated members, as no procedure existed at the time for holding elections. However, the members were divided between the "official members" who held executive posts in the administration of the Protectorate, and the "unofficial members" who held no posts. In 1926, a system of election was worked out and the first election was held for five elected unofficial members,