“On this International Day of Peace, let us pledge to teach our children the value of tolerance and mutual respect. Let us invest in the schools and teachers that will build a fair and inclusive world that embraces diversity. Let us fight for peace and defend it with all our might.”
UN Secretary-General Ban Ki-moon
Each year the International Day of Peace is observed around the world on 21 September. The General Assembly has declared this as a day devoted to strengthening the ideals of peace, both within and among all nations and peoples.
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http://www.un.org/en/events/peaceday/