October 24 marks the anniversary of the entry into force of the UN Charter in 1945, after it was ratified by a majority of signatory states, including the five permanent members of the Security Council, officially launching the organization's work. In 1947, the General Assembly recommended that member states observe the date annually as United Nations Day. The day reaffirms the principles on which the United Nations was founded after World War II, chiefly maintaining international peace and security, promoting human rights, supporting sustainable development, and resolving conflicts through dialogue rather than war. It also provides an occasion to reflect on the organization's achievements and the challenges it faces in addressing contemporary global crises. UN headquarters and offices around the world mark the day with public events, exhibitions introducing the work of various UN agencies, and discussions on pressing global issues such as peace, climate, and development.