The following is my take on this event since the Bible is a Catholic book the prophecies in it are for Catholics, not man-made religions with their "end-of-the-world/rapture" stuff.
I see two meanings in this prophecy. I imagine it is a sign to signal the conversion of the Jєωs, accepting Jesus Christ, Jupiter the King planet REPRESENTS their Saviour as well as ours, the twelve stars might represent the 12 tribes, also Mary, giving birth to the Saviour and twelve stars the apostles starting with Peter as the head of His Church.
I do think it is also a sign for Catholics to prepare for the physical chastisement. Vatican II is the spiritual chastisement.
This physical chastisement will bring on the conversion of the Israel in my opinion.
One scientist claimed that when Jupiter leaves the womb of the Virgo (September 23rd or so) it goes into a constellation that means the scales of justice, I find that interesting also. However, I forgot the name of the constellation since I am not familiar with the science of universe and its constellations.
That is my understanding of this September 23, nothing will happen THAT DAY and the world will soon forget all about it, Protestants will be disappointed and be confused. The Novus Order will laugh about it, but it does mean something for Traditional Catholics to look forward to in the near future and when September comes and goes, we should not forget the happening, it is not just a coincidence.