[quote]A world without a moon would probably be pretty pitch-black at night, so that might add to why it's such a big deal when night comes. On the other hand, having a moon lets us use the word 'moonlight' or 'moonrise' or what-have-you when a paragraph is oversaturated with 'night.' [/quote] on the topic of the moon and also a bit on religion If you do have a moon its still only going to be in the sky over the night side for half its orbit. If it had earth's moon then you would have month long moon based day-like cycles. also the moon would go through its phases as it crossed the sky and what those are depends on the time of day. at nightfall the new moon rises and it sets full. at midnight it rises half, is full at the peak and then sets half again, finally at dawn it rises full and sets new. It gives a way to tell how close the dawn is. You could probably have moon cults that worship the moon that grow popular in the night and wane with the day. also some kind of festival when the full moon coincides with the moon being at the highest point of the sky, something a bit like Christmas/Hanukkah/new years or all the other half way through winter celebrations as a kind of moral booster for the people.