February 22, 2018 is World Thinking Day. It is a day to think about the meaning of Guiding and Scouting and about Scouts and Guides in all the countries of the world. Many troops use it as an opportunity to study about other countries and cultures. Donations are collected for the Thinking Day Fund which supports projects to help Guides and Scouts around the world. February 22 was chosen as it was the birthday of Scouting founder Robert Baden-Powell and of Olave Baden-Powell, his wife and World Chief Guide.
On the nearest weekend to World Thinking Day, Girl Guides and Girl Scouts from across the world come together on ScoutLink to chat with each other and celebrate their Founders. Others are involved with Thinking Day on the Air (TDOTA) using amateur radio. Some World Association of Girl Guides and Girl Scouts member organizations use it as an opportunity to do projects with their 'twin' organization, such as Canada and Dominica.
It is also a tradition to send letters or postcards to other Scout and Guides before Thinking Day. In 2009 and 2010 a postcard campaign was organized by the Ring deutscher Pfadfinderverbände, Ring Deutscher Pfadfinderinnenverbände, Lëtzebuerger Guiden a Scouten, Swiss Guide and Scout Movement, Pfadfinder und Pfadfinderinnen Liechtensteins and Pfadfinder und Pfadfinderinnen Österreichs. Other Scouts celebrate it as B.-P. Day or Founders Day. (From: Wikipedia)