Supreme Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei planted a sapling on the eve of the National Tree Planting Day which falls on March 6.

During the ceremony, Supreme Leader urged officials of Agricultural Jihad and Energy ministry to take as serious the Watershed management issue in relation to planting trees and greeneries .

On Arbor Day, individuals and groups are encouraged to plant trees and many countries mark the occasion.

Though usually observed in the spring, the date varies depending on climate and suitable planting season.