Advise about the Day & Night duration at north & south pole?

Does there total darkness during the night at poles?Advise about the Day %26amp; Night duration at north %26amp; south pole?
From the perspective of the Northern Hemisphere...





For the North Pole...





The sun rises on the Spring Equinox, and stays risen for 6 months, until the Autumnal Equinox. At that time, the sun sets and it remains dark for 6 months. So right now the North Pole is completely dark.





For the South Pole...





The sun sets on the Spring Equinox, and stays set for 6 months, until the Autumnal Equinox. At that time, the sun rises and it remains risen for 6 months. So right now the South Pole is experiencing sunlight.