| Year
| Date
| Event
|
| 1930
| 16 August
| The first British Empire Games, the forerunners of the Commonwealth Games, open in Hamilton, Canada.
|
| 1931
| 11 December
| The Statute of Westminster 1931 formalises the Balfour Declaration 1926, with the Parliament of the United Kingdom renouncing legislative power over the dominions. It is adopted by Canada, the Irish Free State, Newfoundland, and the Union of South Africa. Australia and New Zealand decline to adopt it.
|
| 1932
| 21 July
| The British Empire Economic Conference is convened.
|
| 1934
| 16 February
| The self-government of the Dominion of Newfoundland is suspended, replaced by the Commission of Government. Newfoundland ceases to be in the Commonwealth.
|
| 4 August
| The second British Empire Games open in London, the United Kingdom.
|
| 1936
| 20 January
| King George V dies, being succeeded by Edward VIII.
|
| 10 December
| King Edward VIII writes a note of abdication.
|
| 11 December
| The United Kingdom passes His Majesty\'s Declaration of Abdication Act 1936 (which, at the request of those countries\' Parliaments, equally applies to Australia, New Zealand, and South Africa), effecting Edward VIII\'s abdication and succession by George VI. Canada passes the Succession to the Throne Act to the same effect.
|
| The Constitution (Amendment No. 27) Act of the Irish Free State comes into effect, removing reference to the King in the Constitution.
|
| 12 December
| The Irish Free State passes the Executive Authority (External Relations) Act 1936, resurrecting the office of king and recognising George VI as Edward VIII\'s successor, one day after the rest of the Commonwealth.
|
| 1937
| 29 December
| A new Irish constitution is promulgated, transforming the Irish Free State into \'Ireland\', creating the position of President, and calling into question who the Irish Head of State was.
|
| 1938
| 5 February
| The third British Empire Games open in Sydney, Australia.
|
| 1939
| 1 September
| Nazi Germany invades Poland, precipitating an ultimatum from the United Kingdom, which was ignored by Germany, leading inexorably to the Second World War.
|
| 2 September
| Irish Taoiseach Éamon de Valera announces his intention to remain neutral in the impending war, regardless of British policy. The government declares the Emergency.
|
| 3 September
| The United Kingdom declares war upon Nazi Germany, beginning the British Empire and Commonwealth\'s involvement in the six-year conflict.
|
| Australia legally joins the Commonwealth, although this is only effected by the retroactive commencement of the Statute of Westminster Adoption Act 1942 three years later.
|
| 4 September
| South Africa\'s United Party refuses to accept Prime Minister Barry Hertzog\'s declaration of neutrality in the war, and vote to replace him as party leader with Jan Smuts.
|
| 6 September
| South Africa declares war upon Nazi Germany, becoming the first dominion to do so independently of the United Kingdom.
|
| 9 September
| Canada declares war upon Nazi Germany.
|
| Year
| Date
| Event
|
| 1942
| 9 October
| Australia passes the Statute of Westminster Adoption Act 1942, adopting the Statute of Westminster 1931, but back-dating it to 3 September 1939, when the United Kingdom (and therefore Australia) declared war upon Nazi Germany. Australia becomes a member of the Commonwealth.
|
| 1944
| 1 May
| The first Commonwealth Prime Ministers Conference convenes in London.
|
| 1945
| 4 April
| A Commonwealth Statesmen\'s Meeting convenes in London.
|
| 1946
| 23 April
| The second Commonwealth Prime Ministers Conference convenes in London.
|
| 1947
| 14 August
| Pakistan (including modern Bangladesh) joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 15 August
| India joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 25 November
| New Zealand passes the Statute of Westminster Adoption Act 1947 and becomes a member of the Commonwealth.
|
| 1948
| 4 February
| Ceylon (modern-day Sri Lanka) joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 16 June
| Three European plantation managers are killed in Perak, sparking the Malayan Emergency, leading to deployment of Commonwealth soldiers to Malaya.
|
| 11 October
| The third Commonwealth Prime Ministers Conference convenes in London.
|
| 1949
| 31 March
| Newfoundland, a dominion until 1934, joins Canada as a province.
|
| 18 April
| Éire leaves the Commonwealth upon becoming a republic, after the Republic of Ireland Act 1948 comes into effect.
|
| 22 April
| The fourth Commonwealth Prime Ministers Conference convenes in London. The agenda is dominated by the impending independence of India and its future within the Commonwealth.
|
| 28 April
| The Commonwealth Heads of Government issue the London Declaration. It allows India (and, thenceafter, all other members) to remain in the Commonwealth without having the British monarch as Head of State, creates the position of Head of the Commonwealth, and changes the name of the organisation to the \'Commonwealth of Nations\'.
|
| Year
| Date
| Event
|
| 1950
| 26 January
| India becomes a republic, being the first non-Commonwealth Realm member of the Commonwealth.
|
| 4 February
| The fourth British Empire Games open in Auckland, New Zealand. These would be the last under that name.
|
| 1951
| 4 January
| The fifth Commonwealth Prime Ministers Conference convenes in London.
|
| 1952
| 6 February
| George VI dies, being succeeded as monarch of the Commonwealth Realms and Head of the Commonwealth by Elizabeth II.
|
| 20 October
| Sir Evelyn Baring, Governor of Kenya, declares a state of emergency, recognising the severity of the Mau Mau Uprising.
|
| 1953
| 3 June
| The sixth Commonwealth Prime Ministers Conference convenes in London.
|
| 1954
| 30 July
| The British Empire Games are renamed the \'British Empire and Commonwealth Games\', with the opening of the 1954 Games in Vancouver, Canada.
|
| 1955
| 26 January
| The seventh Commonwealth Prime Ministers Conference convenes in London.
|
| 1956
| 27 June
| The eighth Commonwealth Prime Ministers Conference convenes in London.
|
| 1957
| 6 March
| Ghana, previously the Gold Coast, joins the Commonwealth upon being granted independence by the United Kingdom, becoming the first majority-ruled African member.
|
| 26 June
| The ninth Commonwealth Prime Ministers Conference convenes in London.
|
| 31 August
| The Federation of Malaya joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 1958
| 3 January
| The Federation of the West Indies is formed from the British West Indies as a self-governing colony.
|
| 30 July
| The 1958 British Empire and Commonwealth Games open in Cardiff, the United Kingdom.
|
| Year
| Date
| Event
|
| 1960
| 3 February
| British Prime Minister Harold Macmillan issues his \'Wind of Change\' speech to the Parliament of South Africa.
|
| 3 May
| The tenth Commonwealth Prime Ministers Conference convenes in London.
|
| 1 October
| Nigeria joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 1961
| 8 March
| The eleventh Commonwealth Prime Ministers Conference convenes in London.
|
| 27 April
| Sierra Leone joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 31 May
| South Africa becomes a republic, withdrawing from the Commonwealth.
|
| 16 August
| Cyprus joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 9 December
| Tanganyika, now part of Tanzania, joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 1962
| 31 May
| The Federation of the West Indies collapses. Its constituent states revert to being colonies of the United Kingdom, and preparations begin to grant them separate independence within the Commonwealth.
|
| 6 August
| Jamaica joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 31 August
| Trinidad and Tobago joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 10 September
| The twelfth Commonwealth Prime Ministers Conference convenes in London.
|
| 9 October
| Uganda joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 22 November
| The 1962 British Empire and Commonwealth Games open in Perth, Australia.
|
| 1963
| 10 December
| Zanzibar, now part of Tanzania, joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 12 December
| Kenya joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 1964
| 26 April
| Two Commonwealth members, Tanganyika and Zanzibar, merge to form the United Republic of Tanzania, which joins the Commonwealth.
|
| 6 July
| Malawi, previously Nyasaland, joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 8 July
| The thirteenth Commonwealth Prime Ministers Conference convenes in London.
|
| 21 September
| Malta joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 24 October
| Zambia, previously Northern Rhodesia, joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 1965
| 18 February
| The Gambia joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 17 June
| The fourteenth Commonwealth Prime Ministers Conference convenes in London.
|
| 6 August
| Singapore joins the Commonwealth upon being granted independence by Malaysia.
|
| 1966
| 10 January
| The fifteenth Commonwealth Prime Ministers Conference convenes in Lagos, Nigeria. It was the first Conference held outside London.
|
| 26 May
| Guyana, previously British Guiana, joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 4 August
| The 1966 British Empire and Commonwealth Games open in Kingston, Jamaica. It was the first time the Games were held outside the so-called \'White Commonwealth\', and the last time the Games included the British Empire in their name.
|
| 6 September
| The sixteenth Commonwealth Prime Ministers Conference convenes in London.
|
| 30 September
| Botswana joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 4 October
| Lesotho, formerly Basutoland, joins the Commonwealth upon being granted independence by the United Kingdom.
|
| 30 November
| Barbados joins the Commonwealth upon being granted independence by the United Kingdom.
|