Category
page 1Observances about science
Pi Day
mathematical holiday on March 14
International Year of Astronomy
2009 UN theme year
Darwin Day
annual commemoration of Charles Darwin and science
International Day of Human Space Flight
UN International Day
Mole Day
unofficial commemoration of the Avogadro constant
World Year of Physics 2005
world year
International Year of Chemistry
world day
DNA Day
holiday celebrated on April 25
National Science Day
annual celebration in India to mark the discovery of the Raman effect
International Day of Radiology
International observance, 8 November
Square Root Day
unofficial holiday
Astronomy Day
Annual event
International Year of Crystallography
2014 event for X-ray crystallography
Galactic Tick Day
Awareness and education day for the movement of the Solar System