24 October 2002 The United Nations officially came into existence on 24 October 1945, when the Charter was ratified by China, France, the Soviet Union, the United Kingdom, the United States and by a majority of other signatories. United Nations Day is celebrated on 24 October each year. Programme for United Nations Day Concert 2002 Multimedia Page on United Nations Day --Includes video message of the Secretary-General Secretary-General's message on the occassion of UN Day Secretary-General's message at the UN Day Concert Message from the Deputy Secretary-General Message from the President of the General Assembly UN Information Centres' UN Day Page About the UN Link to UN Day page from 2001 Dag Hammarskjold Library Page    UN Conferences & Events / Overview of Conferences & Observances