May 15, 1829 – While Joseph Smith, jun., and Oliver Cowdery were engaged in prayer in the woods, near Harmony, John the Baptist descended as a messenger from heaven in a cloud of light and ordained them to the Priesthood of Aaron and commanded them to baptize and ordain each other. This they did the same day. Immediately after being baptized, the Holy Ghost fell upon them in great measure and both prophesied. (See Doc. and Cov., Sec. 13, and History of Joseph Smith.)
May 7, 1834 – The Prophet’s company of volunteers, known in the history of the Church as Zion’s Camp, was partly organized, consisting of over one hundred and fifty men with twenty baggage wagons.
May 9, 1840 – Elder Theodore Turley, who had been imprisoned in Stafford jail, England, at the instigation of a Methodist preacher, was released.
May 1885 – Apostles Brigham Young and Moses Thatcher visited the City of Mexico, and obtained permission from the Federal government for the Saints to remain in Chihuahua.