The representatives of 50 countries at the United Nations Conference drew up the United Nations Charter on International Organization, which met at San Francisco from 25 April to 26 June 1945. Those delegates deliberated on the basis of proposals worked out by the representatives of China, the Soviet Union, the United Kingdom and the United States at Dumbarton Oaks in August-October 1944. The representatives of the 50 countries signed the Charter on 26 June 1945. Poland, which was not represented at the Conference, signed it later and became one of the original 51 Member States.

The United Nations officially came into existence on 24 October 1945, when the Charter had been ratified by China, France, the Soviet Union, the United Kingdom, and the United States and by a majority of other signatories. United Nations Day is celebrated on 24 October each year.

With the admission of Kiribati, Nauru and Tonga, there are now 1

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