When is the Second Coming?

Will no man know the day or the hour of the second coming?

"Christ says, 'No man knoweth the day or the hour when the Son of Man cometh.' . . . Did Christ speak this as a general principle throughout all generations? Oh no; he spoke in the present tense. No man that was then living upon the footstool of God knew the day or the hour. But he did not say that there was no man throughout all generations that should know the day or the hour. No, for this would be in flat contradiction with other scripture, for the prophet says that God will do nothing but what he will reveal unto his servants the prophets [ Amos 3:7]. Consequently, if it is not made known to the prophets it will not come to pass."

- The Prophet Joseph Smith, Commentary on the Bible,112 (see also here)