Paul,
Yahusha (the Messiah) told John what to write to the churches in the Book of Revelation. That includes the sign of The Woman in Revelation 12:1-2.
He may not have known the timing of his second coming before he was killed and brought back to life. However, I believe that he knew the timing when he made his revelation to John many years later.
He also gave our generation computers and an understanding of celestial mechanics. We can know with certainty the timing of the sign of The Woman. It is simply a matter of putting the puzzle together.
See right there..."I believe.." did not Jesus say.."get thee behind me Peter"? Why did Jesus say that? Cause Peter was imposing his OWN version of what was going to happen and how...kinda like people who predict when prophecy will happen.
I believe that we can know the signs..but the DATE/TIMING of such actions are in God's hands.
I would strongly suggest that you read what the serpent said to the women in that garden of Eden. He questioned the women about what God said.."did He really say that?" YOU are questioning what is written in the NT to what His ONLY SON said. God's laws/love/eventual judgement of this earth is on HIS own time line. We can't know that..otherwise could we not say.."if that will happen then..then I can surely SIN until such time and then be saved!"