Worldwide celebration to celebrate the father of one of the most important scientific theories in history: the Theory of Evolution. Charles Darwin was born on 12 February 1809.

The loss of a species causes a "domino" effect, which favors the extinction of others or the degradation of the ecosystems that depend on it. WWF has chosen the day to launch its Our Nature campaign, remembering that our species still has time to choose the end of our evolutionary journey or to coexist with nature in a relationship of coexistence and collaboration.