TRUE, TO AN EXTENT: A study from the 80’s suggested that the rate of criminality is increased due to ‘human tidal waves’ caused by the gravitational pull of the moon. Except, crime doesn’t really increase, so that part’s not so true.
The truth lies in the moon’s impact on us. We are 70% water, after all. So there’s some truth to the gravitational bit.
But, then again, the same tidal forces are working during a new moon, but we just can’t see it. And yet, less criminal activity.