Planting trees today for a greener tomorrow. Unlike many celebrations and holidays that observe historical events, Arbor Day looks to the future with hope. True to its "tree day" Latin translation, Arbor Day celebrates the planting, nurturing and preservation of trees. Arbor Day is a time to honor, admire and respect trees for their contributions to the well-being of living things and the good of the Earth. A day of awareness...planting seeds and trees for a brighter future...focusing on a greener planet.