April 6 is recognized as the date of the organization of the Church, but it is also the date of other significant events in Church history: April 6, 1829, Joseph Smith bought property from Emma’s father and thus had a home in which he and Oliver Cowdery could begin the translation of the golden plates without hindrance. See “The Miraculous Timing of the Translation of the Book of Mormon,” by John W. Welch, free chapter here.
April 6, 1830, the Church of Christ was organized at the home of Peter Whitmer in Fayette, New York. Read the description in Joseph’s later journal at History, 1838-1856, volume A-1, here.
April 6, 1833, was the first time the anniversary of the organization of the Church was recognized and used for a conference, held in Independence, Missouri, at “the Ferry on Big Blue river.” Read the description in Joseph’s history here.
April 6-9, 1844, was a conference of the Church in Nauvoo at which Joseph Smith preached the King Follett sermon (this sermon was on April 7). Read the accounts of the sermon here.
April 6, 1877, the St. George Temple was dedicated. To learn why this temple is so significant, as the place of the first endowments for the dead, read “Line upon Line, Precept upon Precept: Reflections on the 1877 Commencement of the Performance of Endowments and Sealings of the Dead,” by Richard E. Bennett, here.
April 6,1889, was the date of the first general Relief Society meeting, held in Salt Lake City at the Assembly Hall. Zina Diantha Huntington Young gave a discourse, presented in full here.
April 6, 1893, was the date of the Salt Lake Temple dedication (the first of several days of dedication services). Read the story of that date and see photos of the First Presidency taken on that very day in “Photographs of the First Presidency, April 6, 1893,” by Richard Neitzel Holzapfel and Thomas R. Wells, here.
For a scholarly study of why we think April 6 might not be the actual date of the birth of Jesus Christ, see “Dating the Birth of Christ,” by Jeffrey R. Chadwick, here.