I see that you are adamant that the Rapture will happen when a predetermined number of Gentiles come to faith in Christ. Whilst I agree with you in principle, that number will occur on a predetermined date. Therefore it stands to reason that the Rapture will occur on a specific date in time when a specific number of Gentiles has been saved. Or would you rather say that a specific number will come in on a specific date? Surely both points are valid?
Because God knows the day on which the Church will reach its predetermined number, then the date of the rapture is already known to Him.
However, with us it’s a different story. We don’t know the predetermined number, we don’t know the current number, and we don’t know the rate of growth. Therefore no one on Earth can know the date of the rapture in advance.
However, we are supposed to know from the signs we see around us that the time is near. We shouldn’t be in the dark about this and we shouldn’t be taken by surprise (1 Thes. 5:4).