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 crashed in 1931. An international agreement restricted output. This caused a catastrophe in Northern Rhodesia where many employees were sacked, and put an end to hopes which many Europeans had held of turning Northern Rhodesia into another white dominion like Southern Rhodesia. Many settlers took this opportunity to move back to Southern Rhodesia, while Africans returned to their farms. Despite the economic crash large firms were still able to maintain a profit. The fact that unemployed workers had left meant there were no increases in taxation, and labour costs remained low. At a 1932 conference of copper producers in New