The following information is courtesy of the Radio Society of Great Britain:
World Thinking Day on the Air is organized by The Guide Association on the third full weekend in February. The founder of the Guide movement, Lord Baden-Powell, and his wife, Lady Baden-Powell, the World Chief Guide both celebrated their birthday on February 22, which is now known to all Guides as Thinking Day.
On Thinking Day members all over the world think about the international nature of Guiding.
The aim of World Thinking Day on the Air (TDOTA) is to encourage Guides to make friendships with members of other units, using Amateur Radio as the means of communication.
TDOTA stations are mostly set up by experienced Radio Amateurs who voluntarily work to support TDOTA. The positive effects of the event are shown in the increasing numbers of Guiders, Rangers, and the Guides themselves, with Amateur Radio certifications..
To find out more visit the World Thinking Day website at https://www.worldthinkingday.org/en/home