God knows, but His focus is on preparing the Church He desires to have for Jesus. So, there is the timing, not only some time which we humans might want to focus on.
So, it is good to invest our attention in what God is concerned about.
Jesus says to be ready. Even if He comes after we die, we need to be ready so we die well, being the way we will need to be when He resurrects the dead first. By dying well and ready, we are ready for Rapture.