Step-by-step explanation:
1- Every year on April 22,Earth Day marks the anniversary of the birth of the modern environmental movement in 1970.
2-The united nations general assembly today decided to observe the international day of non-violence each year on 2 October.
3- The first celebration of labour day on india took place in Chennai on May 1,1923.
4- In an earth day celebration in 2011, 28 million trees were planted in Afghanistan by the earth day network.
5- 5 june
I hope it's helpful!