The bible is clear that only the Father knows when, but why the book of Revelations if it is not a guide for us to recognize that it is coming?
28"Now learn the parable from the fig tree: when its branch has already become tender and puts forth its leaves, you know that summer is near. 29"Even so, you too, when you see these things happening, recognize that He is near, right at the door. 30"Truly I say to you, this generation will not pass away until all these things take place.…
By the way, anyone who ever predicted the end was nigh prior to 1948, simply did not know his scriptures. The end-times passages in the Bible mention Israel specifically.