kb/data/en.wikipedia.org/wiki/Arbor_Day-0.md

title	chunk	source	category	tags	date_saved	instance
Arbor Day	1/4	https://en.wikipedia.org/wiki/Arbor_Day	reference	science, encyclopedia	2026-05-05T08:05:19.510722+00:00	kb-cron

Arbor Day is a secular day of observance 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.

== Origins and history ==

=== First Arbor Day === The Spanish village of Mondoñedo held the first documented arbor plantation festival in the world organized by its mayor in 1594. The place remains as Alameda de los Remedios and it is still planted with lime and horse-chestnut trees. A humble granite marker and a bronze plate recall the event. Additionally, the small Spanish village of Villanueva de la Sierra held the first modern Arbor Day, an initiative launched in 1805 by the local priest with the enthusiastic support of the entire population.

While Napoleon was ravaging Europe with his ambition in this village in the Sierra de Gata lived a priest, don Juan Abern Samtrés, which, according to the chronicles, "convinced of the importance of trees for health, hygiene, decoration, nature, environment and customs, decides to plant trees and give a festive air. The festival began on Carnival Tuesday with the ringing of two bells of the church, and the Middle and the Big. After the Mass, and even coated with church ornaments, don Juan, accompanied by clergies, teachers and a large number of neighbours, planted the first tree, a poplar, in the place known as Valley of the Ejido. Tree plantations continued by Arroyada and Fuente de la Mora. Afterwards, there was a feast, and did not miss the dance. The party and plantations lasted three days. He drafted a manifesto in defence of the trees that was sent to surrounding towns to spread the love and respect for nature, and also he advised to make tree plantations in their localities.

=== First American Arbor Day ===

The first American Arbor Day was originated by J. Sterling Morton of Nebraska City, Nebraska, at an annual meeting of the Nebraska State board of agriculture held in Lincoln. On April 10, 1872, an estimated one million trees were planted in Nebraska. In 1883, the American Forestry Association made Birdsey Northrop of Connecticut the chairman of the committee to campaign for Arbor Day nationwide; Northrop further globalized the idea when he visited Japan in 1895 and delivered his Arbor Day and Village Improvement message. He also brought his enthusiasm for Arbor Day to Australia, Canada, and other countries in Europe.

=== McCreight and Theodore Roosevelt === Beginning in 1906, Pennsylvania conservationist Major Israel McCreight of DuBois, Pennsylvania, argued that President Theodore Roosevelt's conservation speeches were limited to businessmen in the lumber industry and recommended a campaign of youth education and a national policy on conservation education. McCreight urged Roosevelt to make a public statement to school children about trees and the destruction of American forests. Conservationist Gifford Pinchot, Chief of the United States Forest Service, embraced McCreight's recommendations and asked the President to speak to the public school children of the United States about conservation. On April 15, 1907, Roosevelt issued an "Arbor Day Proclamation to the School Children of the United States" about the importance of trees and that forestry deserves to be taught in U.S. schools. Pinchot wrote McCreight, "we shall all be indebted to you for having made the suggestion."

== Observance by country ==

=== Algeria === Algeria celebrates Arbor Day on October 25. They teach children about trees and host tree planting events. In 2025, they launched a campaign to plant one million trees.

=== Australia === Arbor Day has been observed in Australia since the first event took place in Adelaide, South Australia on the 20th June 1889. Planet Ark's National Schools Tree Day is held on the last Friday of July for schools and National Tree Day the last Sunday in July throughout Australia. Many states have Arbour Day, although Victoria has an Arbour Week, which was suggested by Premier Rupert (Dick) Hamer in the 1980s.

=== Belgium === International Day of Tree Planting is celebrated in Flanders on or around 21 March as a theme-day/educational-day/observance, not as a public holiday. Tree planting is sometimes combined with awareness campaigns of the fight against cancer under the name Kom Op Tegen Kanker.

=== Brazil === The Arbor Day (Dia da Árvore) is celebrated on September 21. It is not a national holiday. However, schools nationwide celebrate this day with environment-related activities, namely tree planting.

=== British Virgin Islands === Arbour Day is celebrated on November 22. It is sponsored by the National Parks Trust of the Virgin Islands. They have celebrated the holiday since the 1950s. Activities include an annual national Arbour Day Poetry Competition and tree planting ceremonies throughout the territory.

=== Cambodia === Cambodia celebrates Arbor Day on July 9 with a tree planting ceremony attended by the king.