Why we don't know the timing of the rapture but using scripture to know approximately when.

https://video.wixstatic.com/video/33b6b3_f774ff67270e4b0ea893b6409a471589/1080p/mp4/file.mp4

According to the Word of the Lord there is a war coming, can this be seen ahead of time as to allow us to know when the Rapture will happen.