Arbor Day

American  

noun

1. a day, varying in date but always in the spring, observed in certain states of the U.S. by the planting of trees.

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Etymology

Origin of Arbor Day

An Americanism dating back to 1870–75

Example Sentences

It may be Arbor Day, but it's generally a tough time to be a tree lover.

From Salon • May 3, 2022

To offsets its carbon footprint, the company says, it works both locally and with the Arbor Day Foundation and Trees for the Future, pledging to plant a tree for every order.

From Seattle Times • Nov. 17, 2021

On Arbor Day, the city and foundry unveiled the tree’s new bronze branch.

From New York Times • Oct. 20, 2021

The building’s austere gray lines are softened by trees: From 2005 to 2015, when the lab was under construction, scientists would drive out on Arbor Day to add a few more saplings to the perimeter.

From Washington Post • Sep. 7, 2021

The squirrel's way of observing Arbor Day makes him a useful 104 forester.

From Wild Life on the Rockies by Mills, Enos Abijah