32 Now learn a parable of the fig tree; When his branch is yet tender, and putteth forth leaves, ye know that summer is nigh:

33 So likewise ye, when ye shall see all these things, know that it is near, even at the doors.

34 Verily I say unto you, This generation shall not pass, till all these things be fulfilled.

35 Heaven and earth shall pass away, but my words shall not pass away.

36 But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only.

A short look at the phrase "No Man Knows Day or Hour" and the original Jewish meaning related to the Feast of Trumpets 

12:51 m:s

Rhonda Pickering gives an in-depth look at Jewish Tradition of "Day & Hour No Man Knoweth".  55:40 m:s

Tied to Revelation on Word of Wisdom

8:48 m:s