When Is Arbor Day 2024 Dates. Enter your zip code to find out when your membership trees will ship. Check the map below to find out when your state observes.
Each state’s arbor day celebration starts with the signing of an arbor day proclamation by local officials and arbor day activities related to trees and tree planting. National arbor day always falls on the last friday in april, but many states observe arbor day on different dates.