By observation we see that a normal lunar month, we go from a waning crescent Moon, to a new Moon, to a waxing crescent moon, this is the start of a lunar month. On occasion we have a solar eclipse, this is where the new moon is directly in front of the Sun.
But you claim that is the black Sun that creates a solar eclipse, and this is the only time the black sun is seen, how convenient. Where is the black sun the rest of the time, in the fifth dimension? or is it just magic?