The International Day of Peace, sometimes unofficially known as World Peace Day, is observed annually on 21 September. It is dedicated to peace, and specifically the absence of war and violence, such as might be occasioned by a temporary ceasefire in a combat zone for humanitarian aid access. The day was first celebrated in 1982, and is kept by many nations, political groups, military groups, and peoples.
In 2001 the opening day of the General Assembly was scheduled for 11 September, and Secretary General Kofi Annan drafted a message recognising the observance of International Peace Day on 11 September. That year the day was changed from the third Tuesday to specifically the twenty-first day of September, to take effect in 2002. A new resolution was passed by the General Assembly, sponsored by the United Kingdom (giving credit to Peace One Day) and Costa Rica (the original sponsors of the day), to give the International Day of Peace a fixed calendar date, 21 September, and declare it also as a day of global ceasefire and non-violence.
Many organisations and individuals participate in events marking International Day of Peace worldwide each year around 21 September(actual dates of events may vary). There are school activities, music concerts, global comedy clubs, peace doves, prayer vigils, peace conferences and U.N. activities. Thousands of events each year!