Arbor Day 2024 Philippines Date. Arbor day in the philippine­s. Arbor day has been observed in the philippines since 1947 when president manuel roxas set arbor day every second saturday of september through proclamation no.

It encourages people to plant trees. 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.