International Primate Day

International Primate Day, September 1, is an annual educational observance event organized since 2005 largely by British-based Animal Defenders International (ADI) and supported annually by various primate-oriented advocacy organizations, speaks for all higher and lower primates, typically endorsing humane agendas where primates are at risk, as in research institutions or species endangerment in precarious environmental situations. The event is increasingly practiced by primate advocacy nonprofits in several nations.

Source: Wikipedia — International Primate Day (CC BY-SA 4.0)