Uganda: Polity Style: 1963-2025

9 Oct 1963	Uganda became a sovereign state in accordance with an act passed by the National Assembly of Uganda on 26 Sep 1963, assented to on 30 Sep 1963, effective on 9 Oct 1963 (Uganda Gazette, Legal Supplement (Acts of Parliament) No. 13, 1 Oct 1963, Act No. 61 of 1963, pp. 392-413) [1][2]
9 Oct 1963 - 15 Apr 1966	Sovereign State of Uganda
15 Apr 1966	the Constitution of Uganda is adopted by the National Assembly on 15 Apr 1966 and comes into operation (Uganda Statutes enacted from 16th April to December 1966, pp. 1-173)
15 Apr 1966 - 8 Sep 1967	Uganda
8 Sep 1967	the Constitution of the Republic of Uganda is adopted by the National Assembly sitting as a Constituent Assembly on 8 Sep 1967 and comes into operation
8 Sep 1967 -	Republic of Uganda

Full title: An Act to Effect Changes in the Constitutional Position of Uganda, to Amend the Uganda (Independence) Order in Council, 1962, and the Constitution of Uganda, and to Make Provision Consequent Thereon (may be cited as the Constitution of Uganda (First Amendment) Act, 1963).
The amendments to the Constitution did not explicitly provide for the change of the name, but "Sovereign State of Uganda" was mentioned in Art. 3 and also featured in the Oaths Act, 1963, and the Public Seal Act, 1963.