Earth Day is an annual event, celebrated on April 22, on which day events worldwide are held to demonstrate support for environmental protection. It was first celebrated in 1970, and is now coordinated globally by the Earth Day Network and celebrated in more than 193 countries each year.
Earth Day aims to encourage people across the world to be more environmentally friendly. This might mean increasing the amount they recycle, volunteering for a local green project or installing solar panels at their home.
The day has its own flag, which was created by US peace activist John McConnell and, perhaps unsurprisingly, features a picture of the world on it.
It also has its own anthems – one of which is performed to the tune of Beethoven’s Ode To Joy, but with lyrics about protecting the planet.