A.T. Robertson Commentary Mark 13:32

"But of that day or that hour knoweth no one, not even the angels in heaven, neither the Son, but the Father." — Mark 13:32 (ASV)

Not even the Son (ουδε ο υιος). There is no doubt as to the genuineness of these words here such as exists in Mt 24:36. This disclaimer of knowledge naturally interpreted applies to the second coming, not to the destruction of Jerusalem which had been definitely limited to that generation as it happened in A.D. 70.