The International Day of Peace, sometimes unofficially 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.

To inaugurate the day, the United Nations Peace Bell is rung at UN Headquarters (in New York City). The bell is cast from coins donated by children from all continents except Africa, and was a gift from the United Nations Association of Japan, as "a reminder of the human cost of war"; the inscription on its side reads, "Long live absolute world peace".

• Date: September 21 2023
• Also Called: World Peace Day
• Significance:
• Type: United Nations International Declaration
• Celebrations: Multiple world wide events
• Observed By:
• Religious Type: