Arbor Day is a holiday in which individuals and groups are encouraged to plant trees. Today, many countries observe such a holiday. Though usually observed in the spring, the date varies, depending on climate and suitable planting season. First Arbor Day in the world

The Spanish village of Mondoñedo held the first documented arbour plantation festival in the world organized by its mayor in 1594.

Arbor Day - also known as Dia da Arvore in Brazil takes place on September 21 which is considered to be the beginning of spring in the Southern hemisphere. The dry season ends and the first rains mark the end of September. Every school has special programs, usually lasting a whole week, for students to discuss ways to save the environment and plant trees in or around the school grounds.

The above banknotes depict different facets of the flora and fauna of Brazil. The 5 Cruzeiros depicts Water lilies – one of the important flowers that grow in the country. On the other hand, the 500 cruzados banknote depicts a flowered garden and a man working in it.

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