When and where and by whom was the UN Charter drafted?

The UN Charter was drafted between April 25 and June 26, 1945, during the United Nations Conference on International Organization held in San Francisco, California. The drafting process involved representatives from 50 countries, with key contributions from figures such as U.S. Secretary of State Edward Stettinius and the British Foreign Secretary Ernest Bevin. The Charter was adopted on June 26, 1945, and came into effect on October 24, 1945.