Matthew 24:36-39

No one knows the day or hour. The angels in heaven don't know, and the Son himself doesn't know. Only the Father knows. When the Son of Man appears, things will be just as they were when Noah lived. People were eating, drinking, and getting married right up to the day that the flood came and Noah went into the big boat. They didn't know anything was happening until the flood came and swept them all away. That is how it will be when the Son of Man appears.