History of Zanzibar of Tanzania; it is celebrated on 12 January each year. On 26 April 1964, the mainland colony of Tanganyika united with Zanzibar to form the United Republic of Tanganyika and Zanzibar; this lengthy name was compressed into a portmanteau, the United Republic of Tanzania, on 29 October 1964. After unification, local affairs were controlled by President Abeid Amani Karume, while foreign affairs were handled by the United Republic in Dar es Salaam. Zanzibar remains a semi-autonomous region of Tanzania. The autonomous status of Zanzibar is viewed as comparable to Hong Kong as suggested by some scholars, and being recognized as
Sultanate of Zanzibar Sultanate of Zanzibar The Sultanate of Zanzibar (, ), also known as the Zanzibar Sultanate, comprised the territories over which the Sultan of Zanzibar was the sovereign. Those territories varied over time, and at one point included all of what is now Kenya as well as the Zanzibar Archipelago of the Swahili Coast. Later, the kingdom's realm included only a ten mile wide coastal strip of Kenya and Zanzibar. Under an agreement concluded on 8 October 1963, the Sultan relinquished sovereignty over his remaining territory in Kenya. On 12 January 1964, Sultan Jamshid bin Abdullah was deposed and lost sovereignty