What's all this about?

No, it doesn't mean any of that.

It can't bring destruction, its just the second new moon in one calendar month. Similar to a blue moon, it is not frequent but I bet no one even noticed the last one that happened in March 2014.

A new moon is NOT when the moon is in Earth's shadow.

It could bring with it world destruction, black magic or the Second Coming - or just get moongazers out in force. The last day of September will see a Black Moon rising, a rare lunar event which causes the sky to go dark and the moon become invisible. It’s a time associated with powerful spells and rituals in pagan traditions, with other beliefs considering it to signal the end of the world - or even the second coming of Christ. The rare lunar event happens when the Earth experiences a second new moon in a month, though there are other less common forms of Black Moon. Tomorrow’s astronomical event is similar to a Blue Moon, but in reverse. A Blue Moon occurs when there are two full moon’s in a month, a Black Moon appears when there are two new moons in a month. Because it happens when the moon falls into the Earth’s shadow, different parts of the world will see the black moon at different times.

Well... a 'black moon' happens about every 4 years or so; it's been fine so far.

Maybe you should lighten up & have a Fresca.

thats the question