The name "United Nations", coined by United States President Franklin D. Roosevelt was first used in the Declaration by United Nations of 1 January 1942, during the Second World War, whenrepresentatives of 26 nations pledged their Governments to continue fighting together against the Axis Powers.
UN Radio Classics | British actor Sir Laurence Olivier reads the Preamble to the Charter of the UN
24 October 1945 || The United Nations officially comes into existence