Arbor Day 2024 China Event. National arbor day is always celebrated on the last friday in april, but many states observe arbor day on different dates based on the best tree planting times for their area. On the first arbor day, more than a million trees were planted.

March 12 marks china’s 46th arbor day, a national day dedicated to tree planting and environment protection. On the first arbor day, more than a million trees were planted.