World Rhino Day is observed annually on ______ date ?

1) September 19
2) September 20
3) September 21
4) September 22

Explanation:
World Rhino Day was observed on September 22, 2019. It is an international ecological observance to raise awareness on the protection of 5 existing species of rhinoceros- white rhino, black rhino, Indian rhino, Javan rhino, and Sumatran rhino. It was first observed in 2010 by WWF (World Wide Fund for Nature) South Africa.