The Reappearing of the Son of Man
"But the times of the reappearing of the Son of Man are known only in the councils of Paradise, not even the angels of heaven know when this will occur. However, you should understand that, when this gospel of the kingdom shall have been proclaimed to all the world for the salvation of all peoples, and when the fullness of the age has come to pass, the Father will send you another dispensational bestowal, or else the Son of Man will return to adjudge the age.
"And now concerning the travail of Jerusalem, about which I have spoken to you, even this generation will not pass away until my words are fulfilled; but concerning the times of the coming again of the Son of Man, no one in heaven or on earth may presume to speak. But you should be wise regarding the ripening of an age; you should be alert to discern the signs of the times. You know when the fig tree shows its tender branches and puts forth its leaves that summer is near. Likewise, when the world has passed through the long winter of material-mindedness and you discern the coming of the spiritual springtime of a new dispensation, should you know that the summertime of a new visitation draws near. ~ The Urantia Book, 176:2.5