September 21 is the International Day of Peace, which is also referred to as Peace Day. It's considered a shared date for acts of peace.
For example, the Philippine military said it will declare a one-day truce with communist rebels to mark the International Day of Peace.
The day was created by the United Nations in 1981 and the first Peace Day was celebrated in 1982. The UN's General Assembly declared in 2002 that September 21 would be the permanent date for the International Day of Peace.
