There isn't a specific term for when sunlight shines on the far side of the moon.

Here's why:

* The far side of the moon is always dark: The moon is tidally locked to Earth, meaning the same side always faces us. The far side of the moon is always facing away from Earth and thus, always in darkness.

* The far side experiences sunlight: The far side of the moon experiences sunlight just like the near side. It just doesn't get illuminated at the same time as the near side.

So, while there isn't a specific term for sunlight shining on the far side, it's simply a natural occurrence that happens when the far side of the moon is facing the sun.