National Annual Tree Loving Day in Thailand
National Annual Tree Loving Day in Thailand is held on October 21. This event in the third decade of the month October is annual. 
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Her Royal Highness Princess Somdet Phra Srinakarindra Boromrajajonani had a strong royal wish to restore the balance of nature by always planting and nurturing trees by herself, and placed the importance of maintaining planted trees as more important and worrisome than planting trees.
To express gratitude to Her Royal Higness Princess Somdet Phra Srinakarindra Boromrajajonani, worked on Thailand’s rural development especially restoring the balance of nature, the Cabinet of Ministers of Thailand passed resolution on 26th June 1990 to designate Her Royal Highness Princess Srinakarindra’s birthday on 21st October of every year as the National Annual Tree Maintenance Day.
Similar holidays and events, festivals and interesting facts
Arbor Day in Czech Republic on October 20
Lionfish Spearing in Belize on October 21 (Marine conservation holidays, September to May);
Energy Saving Day on October 21
Sustainability Day on October 22 (The goal is to be able to take care of the planet for a very long time. Held on the fourth Wednesday in October);
International Snow Leopard Day on October 23
International Day of Climate Action on October 24
Tree Planting Day in Algeria on October 27