Evolution Day is a celebration annually on 24 November 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)
On the Origin of Species (or more completely, On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life), is a work of scientific literature by Charles Darwin which is considered to be the foundation of evolutionary biology. It was published on 24 November 1859, and introduced the scientific theory that populations evolve over the course of generations through a process of natural selection. It presented a body of evidence that the diversity of life arose by common descent through a branching pattern of evolution. Darwin included evidence that he had gathered on the Beagle expedition in the 1830s and his subsequent findings from research, correspondence, and experimentation.
Various evolutionary ideas had already been proposed to explain new findings in biology. There was growing support for such ideas among dissident anatomists and the general public, but during the first half of the 19th century the English scientific establishment was closely tied to the Church of England, while science was part of natural theology. Ideas about the transmutation of species were controversial as they conflicted with the beliefs that species were unchanging parts of a designed hierarchy and that humans were unique, unrelated to other animals. The political and theological implications were intensely debated, but transmutation was not accepted by the scientific mainstream.
The book was written for non-specialist readers and attracted widespread interest upon its publication. As Darwin was an eminent scientist, his findings were taken seriously and the evidence he presented generated scientific, philosophical, and religious discussion. The debate over the book contributed to the campaign by T. H. Huxley and his fellow members of the X Club to secularise science by promoting scientific naturalism. Within two decades there was widespread scientific agreement that evolution, with a branching pattern of common descent, had occurred, but scientists were slow to give natural selection the significance that Darwin thought appropriate. During “the eclipse of Darwinism” from the 1880s to the 1930s, various other mechanisms of evolution were given more credit. With the development of the modern evolutionary synthesis in the 1930s and 1940s, Darwin’s concept of evolutionary adaptation through natural selection became central to modern evolutionary theory, and it has now become the unifying concept of the life sciences.
The year 1909, was the 50th anniversary of the publication of On The Origin of Species and the 100th anniversary of Darwin’s birth. As a result Seven major events took place 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.The Darwin Centennial Celebration (1959) had a major, well publicised event from 24–28 November at the University of Chicago. In 2009, the BBC aired BBC Darwin Season, a series of television and radio programs, to celebrate Darwin’s bicentenary and the 150th anniversary of the publication of the Origin.