The celebration of International Day of Peace was first initiated in 1981. However, the date of the World Peace Day celebration was not fixed as September 21 then. For the longest time, the International Day of Peace was observed on the third Tuesday in the month of September. Share quotes about peace with everyone on this day. International Day of Peace 2022 Quotes To Share With Everyone You Know To Understand the Importance of Building a Peaceful Society on World Peace Day.