http://www.usap.gov/videoclipsandmaps/spwebcam.cfm
It is a day/night cycle within the polar day/night cycle as the moon acts like a beacon for the orbital surface rotation of the planet. When the moon reaches its orbital point and shows its fully illuminated face to all observers on Earth outside the North pole in a few days time , the South pole will no longer be at the position it was the last time a full moon occurred.
A little sophistication goes some way, after all, people are not naturally brutes and although some are capable of ignoring the dual surface rotations of the Earth corresponding to dual day/night cycles and the seasons, unfamiliarity is generally the major cause why this insight hasn't made it into wider circulation.
The people to produce accurate graphics and visual explanations of what is going on will make history and open up a new approach to observations.