Independence: 26 April 1964 (Tanganyika united with Zanzibar to form the United Republic of Tanganyika and Zanzibar); 29 October 1964 (renamed United Republic of Tanzania); notable earlier dates: 9 December 1961 (Tanganyika became independent from UK-administered UN trusteeship); 10 December 1963 (Zanzibar became independent from UK)
Definition: For most countries, this entry gives the date that sovereignty was achieved and from which nation, empire, or trusteeship. For the other countries, the date given may not represent "independence" in the strict sense, but rather some significant nationhood event such as the traditional founding date or the date of unification, federation, confederation, establishment, fundamental change in the form of government, or state succession. Dependent areas include the notation "none" followed by the nature of their dependency status. Also see the Terminology note.
Source: CIA World Factbook - This page was last updated on July 9, 2017