[DManA]

This was Arther C. Clark's pet peeve - there is no dark side of the moon. There is a near and a far side of the moon.

[Hegemony Cricket]

So, is the moon half-full, or is it half-empty?

[dangus]

The dark side of the moon is dark in the sense that Africa was the dark continent, that dark matter is dark, and that black boxes are black:

It is unseen. The moon’s rotational period is equal to its orbital period, so the same side faces the Earth.

OF course, there’s also a dark side in the sense of day and nigh, also/... and the moon’s days are 29 times longer than ours!