International Day of Peace 2018: History, Theme This Year From United Nations

The United Nations and people around the world were celebrating the International Day of Peace on Friday, with thousands of different events for peace.

The U.N. established the International Day of Peace in 1981 by a unanimous resolution, and it has been celebrated every year since. This year the theme is "The Right to Peace." The year is dedicated to the 70th anniversary of the Universal Declaration of Human Rights, which is where the "Right to Peace" theme comes from.

The resolution dedicated the day to "commemorating and strengthening the ideals of peace both within and among all nations and peoples." In 2001, the text of the resolution was changed to permanently make the date September 21, and since that year it has been celebrated on that day.

The resolution also asks everyone worldwide to join in the celebration. It "invites all Member States, organs and organizations of the United Nations system, regional organizations, non-governmental organizations, peoples and individuals to commemorate in an appropriate manner the International Day of Peace, especially through all means of education, and to co-operate with the United Nations in the observance of that Day."

Those looking to participate are asked to do so in a way that is meaningful for them or their group, which means there's no one way to participate in the day.

An interactive map of all of this year's events for International Peace Day is available online from the U.N. Organizers are able to create their own events and submit them to the map so users can find an event happening near them. The map is available online at the International Day of Peace's website.

Each event is classified as meditation, music, march or "multiple," based on what the event consists of. Users can click on the event on the map to see more information about it or be taken to another website for additional information.

There will also be a minute-long moment of silence, which is held at noon in each time zone on the day of peace.

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The United Nations flag flies outside of the international headquarters in New York City. The U.N. established the International Day of Peace in 1981. Spencer Platt/Getty Images