In the 12th Chapter of Revelation the Apostle John talks of seeing a sign in the Heavens. Recently, young man from California, using a computer star program found that on Sept. 23, 2017, in the heavens over Jerusalem there will appear something very interesting. Here is a link to his findings. If your interested, I would urge you to look at his entire study that is listed on his channel. He also has a web site.
http://erfministries.com/index.php
Revelation 12New International Version (NIV)
The Woman and the Dragon
12 A great sign appeared in heaven: a woman clothed with the sun, with the moon under her feet and a crown of twelve stars on her head. 2 She was pregnant and cried out in pain as she was about to give birth. 3 Then another sign appeared in heaven: an enormous red dragon with seven heads and ten horns and seven crowns on its heads. 4 Its tail swept a third of the stars out of the sky and flung them to the earth. The dragon stood in front of the woman who was about to give birth, so that it might devour her child the moment he was born. 5 She gave birth to a son, a male child, who “will rule all the nations with an iron scepter.”[a] And her child was snatched up to God and to his throne. 6 The woman fled into the wilderness to a place prepared for her by God, where she might be taken care of for 1,260 days.