United Nations Security Council
The UN officially came into existence on 24 October 1945 upon ratification of the Charter by the five then-permanent members of the Security Council and by a majority of the other 46 signatories. On 17 January 1946, the Security Council met for the first time at Church House, Westminster, in London, United Kingdom.
United Nations Security Council Resolution 14
United Nations Security Council Resolution 14, adopted on December 16, 1946, changed the rules of procedure so that the terms of the rotating presidency of the Council would correspond with the calendar year. Additionally, the terms of elected members of the Security Council were decided to commence on January 1 and end on December 31.