https://en.wikipedia.org/wiki/South_Pole
"During the southern winter (March–September), the South Pole receives no sunlight at all, and from 11 May to 1 August, between extended periods of twilight, it is completely dark (apart from moonlight). In the summer (September–March), the sun is continuously above the horizon and appears to move in a counter-clockwise circle. However, it is always low in the sky, reaching a maximum of 23.5° in December, thanks to the 23.5° tilt of the earth's axis. Much of the sunlight that does reach the surface is reflected by the white snow."