Evolution Day is a celebration to commemorate the anniversary of the initial publication of On the Origin of Species by Charles Darwin on 24 November 1859. Such celebrations have been held for over a century, but the specific term “Evolution Day” for the anniversary appears to be a neologism which was coined prior to 1997. By highlighting Darwin’s contributions to science, the day’s events are used to educate about evolutionary biology. It is similar to the better-known Darwin Day, held on the anniversary of his birth (12 February 1809). It is unrelated to the secularization campaign by the Giordano Bruno Foundation to have the German public holiday of Ascension Day renamed to “Evolutionstag” (Evolution Day).
1909, the 50th anniversary of the publication of On The Origin of Species and the 100th anniversary of Darwin’s birth, saw several major events celebrating both. At Cambridge, more than 400 scientists and dignitaries from 167 countries met in a widely reported event of public interest to honour Darwin’s contributions and discuss the latest discoveries and ideas related to evolution, the New York Academy of Sciences held a celebration at the American Museum of Natural History, and the Royal Society of New Zealand held an event with “a very large attendance”.