The International Polar Years (IPY) are collaborative, international efforts with intensive research focus on the polar regions. Karl Weyprecht, an Austro-Hungarian naval officer, motivated the endeavor in 1875, but died before it first occurred in 1882–1883. Fifty years later (1932–1933) a second IPY took place. The International Geophysical Year was inspired by the IPY and was organized 75 years after the first IPY (1957–58). The fourth, and most recent, IPY covered two full annual cycles from March 2007 to March 2009.

Karl Weyprecht, also spelt Carl Weyprecht, was an Austro-Hungarian explorer. He was an officer in the Austro-Hungarian Navy. He is most famous as an Arctic explorer, and an advocate of international cooperation for scientific polar exploration. Although he did not live to see it occur, he is associated with the organisation of the first International Polar Year.