Yes, this is ASB. But its a very serious, 'hard' ASB so it'd being posted here.
As we all know the moon takes 28 days to orbit the earth and it also takes 28 days to rotate itself hence we on earth always see the same side of the moon (note to the nitpickers- I know its not exactly this)
However.
WI the moon rotated such that its day lasted 16 days? (just a random number, feel free to change it) whilst the rest of the system is totally unaffected- Earth stays the same and it orbits in a month as per usual.
What effects would this have on the development of society on Earth?
I'd think here it becomes far more obvious the moon is another world, perhaps even it would lead to it being easier to figure out our earth is just one world amongst many.
Perhaps the moon becomes even more seen as the god's world?