When is Earth Day? It’s April 22 each year. Here are the dates for the next several Earth Days, so mark your calendar:

 

  • Thursday, April 22, 2010
  • Friday, April 22, 2011
  • Sunday, April 22, 2012
  • Monday, April 22, 2013
  • Tuesday, April 22, 2014
  • Wednesday, April 22, 2015
Did you know?
  • 2010 is the 40th anniversary of Earth Day?
  • It was founded by Sen. Gaylord Nelson (D-Wisc.)
  • Countries in the Southern Hemisphere celebrate it in the autumn.
For more, visit MNN’s collection of Earth Day articles.