April 26 is the Union Day, which is Tanzania’s national day commemorating the unification of Tanganyika and the People’s Republic of Zanzibar in 1964.
Tanzania, officially the United Republic of Tanzania, is a sovereign state in eastern Africa within the African Great Lakes region. It borders Kenya and Uganda to the north; Rwanda, Burundi, and the Democratic Republic of the Congo to the west; Zambia, Malawi, and Mozambique to the south; and the Indian Ocean to the east.
European colonialism began in mainland Tanzania during the late 19th century when Germany formed German East Africa, which gave way to British rule following World War I. The mainland was governed as Tanganyika, with the Zanzibar Archipelago remaining a separate colonial jurisdiction. Following their respective independence in 1961 and 1963, the two entities merged on April 26, 1964, to form the United Republic of Tanzania.