The International Day of Peace, also officially known as World Peace Day, is a United Nations-sanctioned holiday observed annually on 21 September. It is dedicated to world 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 established in 1981 and first observed in September 1982 and is kept by many nations, political groups, military groups, and people.