When Is Arbor Day 2024 Schedule. National arbor day is always celebrated on the last friday in april, but many states observe arbor day on different dates throughout the year based on best tree planting times in their area. Arbor day is observed in spring for the united states but globally dates vary depending on the region's climate and planting season.

Check also the date of arbor day in 2025 and in the following years. 2024 ncaa field hockey tournament bracket.