The Second Coming: Who Knows?

Question:  Who knows the exact time and date of the Lord’s Second Coming?

In the book Jesus The Christ, by James Talmage, pg. 575, we read:

All speculation concerning the time of the Lord’s appearing, whether based on assumption, deduction, or calculation of dates, was forestalled by Christ’s averment: “But of that day and that hour knoweth no man, no not the angels which are in heaven, neither the Son, but the Father.”  (Mark 13:32)

This is Mark’s version of the passage.  Matthew omits the phrase, neither the Son.  The JST leaves the phrase in according to Br. Talmage.
On page 589, the appendix to the chapter, Br. Talmage adds the following explanation: