National Arbor Day 2025. This wonderful holiday of communion with nature, national arbor day, is observed on the last friday in april. Explore arbor day celebrations worldwide and see when communities come together for a greener planet.

National arbor day 2025 (april 25, 2025)we can all show gratitude on national arbor day — especially if we’re lucky enough to live around lots of trees. That means we’ll celebrate it on april 28, 2025.