[firmgently]

There is no dark side of the moon, it's a misnomer - there's a far side from earth's point of view, but it isn't dark or blocked from the sun https://en.wikipedia.org/wiki/Far_side_of_the_Moon

[sitkack]

Actually do mean "the side of the moon not in light", like night on the moon itself.

[MiddleEndian]

The same face of the moon is always towards the Earth, but the sun hits all points of the moon at different times, so no part is perpetually dark. The "dark side" is just the side facing away from Earth.