Joseph Smith - the churches should "be in readiness to move to Jackson county in two years from the eleventh of September next, which is the appointed time for the redemption of Zion. ... you will learn by this we have a great work to do, and but little time to do it in;"
[Note, this is the 5th anniversary of D&C 64:21: "I will not that my servant Frederick G. Williams should sell his farm, for I, the Lord, will to retain a strong hold in the land of Kirtland, for the space of five years, in the which I will not overthrow the wicked, that thereby I may save some."]
[ History of the Church, vol. 2, p. 145, as quoted in Instutite for Religious Research]