World Planting Day
World Planting Day is held on March 21. This event in the third decade of the month March is annual. 
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Did you know that a mature tree can absorb 48 pounds of carbon dioxide (CO2) per year? Or that one acre of forest can absorb double your car’s yearly output of CO2?
With March 20th being the first day of spring, what a better day than March 21st to celebrate World Planting Day! Trees are incredibly important for a variety of reasons, and World Planting Day is an excellent opportunity to take it upon yourself to plant a tree and have a lasting impact on our planet!
You may think there is nothing much to the plants and trees that are around us every day but they are vital for life and our long-term survival. Plants are an essential resource - we rely on them for food, water, medicine, the air we breathe, habitat, our climate and more.
Similar holidays and events, festivals and interesting facts
World Sparrow Day on March 20
UN French Language Day and International Francophonie Day on March 20 (Organisation internationale de la Francophonie);
World Storytelling Day on March 20
World Head Injury Awareness Day on March 20
World Fairy Tale Day on March 20 (arose on the initiative of Sweden in 1991);
International Without Meat Day on March 20 (This holiday was observed for the first time in 1985 in the USA as Great American Meatout);
International Macaroon Day on March 20 (macaroon is a French confectionery made from egg whites, sugar and ground almonds. Usually made in the form of cookies; put cream or jam between two layers);
World Frog Day on March 20 (celebrated since 2009);
World Flour Day on March 20
International Colour Day on March 21 (The adoption of an international day of colour was proposed in 2008 by the Portuguese Color Association, whose president, Maria Joao Durao, presented the idea to the International Colour Association. The proposal was agreed in 2009 among the members of this society, which is composed of national associations and members representing more than 30 countries);
World Office Storage Day on March 21
World Puppetry Day on March 21
Education Freedom Day on March 21 (The first Education Freedom Day was observed on January 17, 2013. The date, however, had to later be changed due to incompatibilities with local holidays such as Chinese New Year and summer holidays when schools are closed. Presently it is observed in March. In 2016, EFD was observed on March 21. Event organization is handled by DFF and volunteers around the world. Volunteers are encouraged to organize events that benefit local educational communities);
National Tree Planting Day in Lesotho on March 21
Arbor Day in Portugal on March 21
International Taxi Driver Day on March 22 (it was on this day in 1907 that the first taxis appeared on the streets of London);
International Goof Off Day on March 22
World Maths Day on March 22 (date for 2025)