v t e Events commemorating achievements in the sciences
Anniversary celebrations	Alfred Russel Wallace centenary Darwin Centennial Celebration (1959)
Regular holidays	Ada Lovelace Day Astronauts Day Cosmonautics Day Darwin Day DNA Day Evolution Day International Day of Human Space Flight Mole Day National Astronaut Day Pi Day Yuri's Night
Year long events	First International Polar Year (1882–1883) Second International Polar Year (1932–1933) International Polar Year (2007–2008) International Geophysical Year International Year of Planet Earth International Year of Astronomy International Year of Chemistry International Year of Crystallography International Year of Light International Space Year World Year of Physics 2005

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This category contains articles discussing celebrations of anniversaries or achievements in Science.