Arbor Day is always the last Friday in April and has been celebrated since 1872. It began in Nebraska, a largely treeless plain back in the 1800’s. It is a day to plant and dedicate a tree to help nature and the environment. Millions of trees are planted on this day.
The National Arbor Day Foundation provides millions of trees for planting, and it is estimated that 18 million trees are planted each year on Arbor Day. (from cute-calendar.com)