It is an annual celebration of the legacy of Alexander von Humboldt, whose work in botanical geography was foundational to the field of Biogeography.
Due to the impact of the celebrations for the 250th anniversary of his birth, (September 14, 1769 - May 6, 1859), the International Society of Biogeography organizes this day
During the week of September 14 - 19 there will be events around the world
Check out this page for full details