The UN Charter requires that countries with disputes that could "endanger the maintenance of international peace and security" shall first of all try to "seek solutions through peaceful methods such as "negotiation, enquiry, mediation, conciliation, arbitration, judicial settlement, resort to regional agencies or arrangements, or other peaceful means of their own choice." It envisages roles for the Secretary-General, the Security Council and the General Assembly, among others, in the peaceful settlement of disputes; and UN resolutions and practice have further contributed to the development of the peacemaking functions of the Organization.
- International Day of Sport for Development and Peace (6 April)
- International Day of Living Together in Peace（16 May)
- World Day for Cultural Diversity for Dialogue and Development (21 May)
- International Day of Non-Violence (2 October)
- International Day for Tolerance (16 November)
- International Day of Friendship (30 July)
International days are occasions to educate the public on issues of concern, to mobilize political will and resources to address global problems, and to celebrate and reinforce achievements of humanity. The existence of international days predates the establishment of the United Nations, but the UN has embraced them as a powerful advocacy tool. We also mark other UN observances.