Yes, we can know when the Rapture will happen, not the day or the hour, but just before.

https://video.wixstatic.com/video/33b6b3_f73ba3395a764c73971652984a7e955b/1080p/mp4/file.mp4

1 Thessalonians 5:1 makes it clear; we will know when the Rapture will happen. Using scripture only, step by step, I'll explain. Yes, you can know.