Darwin Day
Darwin Day is held on February 12. International observance. This event in the second decade of the month February is annual. 
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Charles Robert Darwin (12 February 1809 – 19 April 1882) was an English naturalist, geologist and biologist, best known for his contributions to the science of evolution.
Similar holidays and events, festivals and interesting facts
World Pulses Day on February 10 (UN: A/RES/73/251. Dried beans, lentils and peas are the most commonly known and consumed types of pulses. Pulses are a type of leguminous crop that are harvested solely for the dry seed.);
Red Hand Day on February 12 (United Nations);
Innovation Day on February 16
Language Movement Day in Bangladesh on February 21 (International Mother Language Day - UNESCO);
World NGO Day on February 27
National Science Day in India on February 28
World Seagrass Day on March 1