05/25/2009 05:12 am ET Updated May 25, 2011

ARBOR DAY! Last Friday In April: Gift A Tree, Plant A Tree

Arbor Day is celebrated on the last Friday in April -- that's today!

Typically on Arbor Day, people celebrate by planting a tree.

Earlier this week, the Obamas were joined by Bill Clinton as they planted trees with students. HuffPost Green also has a slideshow of many other famous folks planting trees:

Famous People Planting Trees

The Arbor Day Foundation has tips on planting and caring for trees to get you started. And if you don't have the room for an actual tree -- or want to contribute in another way, the Arbor Day Foundation will also plant a tree in honor of a recipient of your choice.