Earth Day (Thursday, April 22.) About Earth Day Earth Day began on April 22, 1970 and has been an important day ever since.  It's a day to reflect on our planet, our environment and what we can do to help keep them healthy. Reduce, Recycle, Reuse. Clean air, clean water, stop pollution, plant trees, protect … Nastavi čitati 40.godišnjica Dana planete Zemlje – 22.travnja 2010.