Joseph prophecies that in the year the rainbow will not be seen, that will be a sign of forthcoming calamites and the Second Coming.
"Discourse, 10 March 1844, as Reported by John S. Fullmer," The Joseph Smith Papers website, accessed August 20, 2024
Prophesy delivered by President Joseph Smith, March 10th 1844. While enquiring of the Lord concerning the End of time, it was made known to him by the Holy Spirit, that there should be prosperity, seed time and harvest every year in which the Rainbow was seen, for to that was Noah refered as a surety on this subject but,— But in the year when the Bow was not to be seen, would commence desolation, calamity and distress among the Nations, without seed time or harvest,— And that the Revelation of the Son of Man from Heaven, would not be in this year, nor the next; and he would say to his Millerite friends, that it would not be in forty years to come. He uttered all this in the name of the Lord, and said we should go home and write it—