The non-uniform day, on October 29, encourages children to take to school £1 to plant a tree and help reforest the planet - a tree is planted for every £1 raised.
To date, more than 200,000 children from 14 countries have joined together to plant over a quarter of a million trees, enabling JUST ONE Tree to expand into more countries, including Brazil, and become part of the UN Decade on Ecosystem Restoration.
The event is open to both primary and secondary schools - those taking part can access lesson resources that fit in with the national curriculum. As part of their fundraising activities, children learn about photosynthesis, the benefits of trees for both people and wildlife and the vital role they play in reducing the impacts of climate change.
Amanda Bronkhorst, JUST ONE Tree founder, said: “JUST ONE Tree Day was born out of my passion to make a difference – not only for my young daughter, but for the future of all children.
“School participation is doubly important because not only do they raise funds, the forest planted on their behalf helps compensate for a school’s environmental impact. Many children struggle with climate anxiety, caused by the reality of our climate crisis. But JUST ONE Tree Day tells them that we can all make a difference with a simple action.
Schools can sign up to take part at www.justonetree.life.