Ecclesiastes 8:7

Therefore you also must be ready; for it is at a time when you do not expect Him that the Son of Man will come.

the master of that servant will arrive on a day when he is not expecting him and at an hour of which he has not been informed;

But at midnight there is a loud cry, "'The bridegroom! Go out and meet him!'

But as to times and dates it is unnecessary that anything be written to you.

Treasury of Scripture Knowledge

For he knoweth not that which shall be: for who can tell him when it shall be?

Therefore you also must be ready; for it is at a time when you do not expect Him that the Son of Man will come.

But at midnight there is a loud cry, "'The bridegroom! Go out and meet him!'

But as to times and dates it is unnecessary that anything be written to you.