Arbor Day is observed in the Philippines every June 25, a holiday dedicated to tree planting and environmental rehabilitation. Established in 2003, this celebration aims to promote a healthier ecosystem through the planting of trees and ornamental plants. The origins of Arbor Day date back to 1872 in the United States, and it was first recognized in the Philippines in 1947, initially celebrated on the second Saturday in September. In 2012, a law was enacted by then-President Benigno Aquino III to revive Arbor Day as an annual public working holiday, requiring all citizens aged twelve and above to plant at least one tree each year. On this day, various tree planting activities take place across the country, highlighting the importance of conserving the Philippines' tropical rainforests, which are home to a diverse range of species.