Full moon / new moon etc. is not in phase with the real one.
I know it's not very important... Until they bring out i44 or IronFront for ArmA3. Then suddenly a para mission on June 6th 1944 is dark as dark can be instead of bright moonlight.
Or someone tries a zero dark thirty mission and finds out it's actually zero bright thirty.
Seems a waste to have moon phases if they're not actually in phase.