Spring — In Joseph Smith's First Vision, in answer to his prayer that was motivated by his reading of James 1:5, Joseph was visited by the Father and the Son in what is now known as the Sacred Grove near his home in upstate New York. Jesus answered his question about which church to join, opening the door to the restoration of the gospel.
Sept. 21-22 — In five visits with Joseph Smith, the resurrected Moroni revealed the existence of ancient gold plates, from which the Book of Mormon was translated, and instructed him on his role in restoring the gospel.
Sept. 22 — Joseph Smith received the gold plates from the Angel Moroni at the Hill Cumorah in upstate New York. He also received the Urim and Thummim, which was used in translating the Book of Mormon.