1830 Last Call for Missionaries?

D&C 33:3; “For behold, the field is white already to harvest; and it is the eleventh hour, and the last time that I shall call laborers into my vineyard.”

Prophecy given in Fayette, NY in October 1830. History of the Church 1:126-127.

This is obviously false as missionaries are still out in the field gathering new converts in 2012.