Welcome to SpaceSR.com here you will get amazing poster on World Earth Day . Earth is one of the eight planet of our solar system that revolves around the sun . Earth is the only known planet that supports life in the entire solar system . World Earth Day is celebrated on the 22nd of April every year . It is to increase public awareness of the Earth’s sustainable environment . It is believed that the Earth is supposed to be 4-5 billion years old . Earth Day is the first event that transcends all nation borders . Several communities focused on environmental issues for a week , calling it Earth Day Week Actions.