Celebrate International Day of Peace on September 21! Each year, International Day of Peace mobilizes millions of people who call for the creation of a culture of peace. Peace is more than just the absence of war; it is about transforming our societies and uniting our global community to work together for a more peaceful, just and sustainable world. International Day of Peace was created to promote the ideals of peace both within and among all nations and peoples. UN Secretary-General Ban Ki-moon has called for a minute of silence at 12 noon to commemorate the day!