Arbor Day (or Arbour; from the Latin word arbor, meaning tree is an age-old tradition where groups are encouraged to plant and care for trees in their communities. “Arbor” or “arbour” comes from the Latin word “arbor” for trees.

Today, many countries continue to follow this tradition. Though usually observed in the spring, the date of Arbor Day varies around the world, depending on climate and the suitable planting season.