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.
When is Earth Day?
Thursday April 22, 2010. Find out more about the holiday.