Multiple choice Which of the following international organisation was founded on 24th October 1945? Red Cross Society The U.N.O. League of Nations Y.M.C.A. Reveal answer Fill a bubble to check yourself B Correct answer Explanation The United Nations Organization (UNO) was founded on October 24, 1945, after World War II. This date is now celebrated as United Nations Day. The UN Charter had been signed earlier on June 26, 1945, in San Francisco.