Which of the following days marks the anniversary of the entry into force of the United Nations Charter (the day the UN was formally established)?
24 October
United Nations Day is observed on 24 October, marking the anniversary of the day in 1945 when the UN Charter entered into force after ratification by the required number of states, formally establishing the United Nations.
The day is celebrated worldwide to highlight the aims and achievements of the UN in promoting international peace, security and cooperation.
The other dates are significant observances but relate to different themes: 10 December is Human Rights Day, 7 April is World Health Day, and 5 June is World Environment Day.
Hence, the day marking the entry into force of the UN Charter is 24 October.
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