No man knows the day or hour of the end of the world (Matt. 24.35,36), but we do know when Jesus returns as He told use we would know after the Tetrad (Rev. 6.12) by the sign of the Son of Man (Matt. 24.30) and if we are watchful (Rev. 3.3).
Why do you reject what the Bible says?
We will know it When He returns. We do not know when it will be (see: like a thief on the night)
Rev. 3.3 says we can know when Jesus returns if we are watchful. All Christians know when Jesus returns even if some of us are not watchful.
The prerequisite therefore to knowing when Jesus returns is to be watchful, but not all Christians who are watchful necessarily know when He returns, for they may have not studied the matter, but they themselves are spiritually ready to be received at the first rapture by fulfilling the condition in Matt. 24.40-42, Luke 21.36, Rev. 3.10.