No one knows about that day or hour, not even the angels in heaven, nor the Son, but only the Father. 

Be on your guard and stay alert! For you do not know when the appointed time will come.

It is like a man going on a journey who left his house, put each servant in charge of his own task, and instructed the doorkeeper to keep watch. 

Therefore keep watch, because you do not know when the master of the house will return—whether in the evening, at midnight, when the rooster crows, or in the morning. 

Otherwise, he may arrive without notice and find you sleeping. And what I say to you, I say to everyone: Keep watch!”

Mark 13:32-37

Are we ready?