The Church of Jesus Christ of Latter-day Saints has taken no official position on the exact date of Christ’s birth.
In his 1915 classic Jesus the Christ, Elder James E.
Elder Mc Conkie would have been aware of both leaders, yet does not seem to have regarded their declaration as official statements of revealed doctrine.
It seems most likely that they assumed, as many have, that D&C 20:1 was a revealed text disclosing the date, rather than a later addition by Whitmer.
Members and leaders of the Church have been of varying opinions on this topic.
Since the early 20th century, many Mormons have thought they knew the exact date of the first Christmas. Talmage, an apostle of The Church of Jesus Christ of Latter-day Saints, published a book in 1915 titled "Jesus the Christ," in which he wrote, "We believe that Jesus Christ was born in Bethlehem of Judea, April 6, B. 1." Elder Talmage didn't just randomly make up this date. So although it references the organization of the church a few days earlier, the revelation — which topically has nothing to do with the birth date of Christ — and its introductory verses "shouldn't be read as if it is a revelation of the birth date of Jesus Christ," Harper said.
When any man, except the President of the Church, undertakes to proclaim one unsettled doctrine, as among two or more doctrines in dispute, as the settled doctrine of the Church, we may know that he is not "moved upon by the Holy Ghost," unless he is acting under the direction and by the authority of the President. " Now, with most all of those questions, if you answer them, you're going to be in trouble. Now, it's the smart man that will say, "There's only one man in this church that speaks for the Church, and I'm not that one man."I think nothing could get you into deep water quicker than to answer people on these things, when they say, "What does the Church think?
All over the Church you're being asked this: "What does the Church think about this or that? "What does the Church think about the civil rights legislation? " "What do they think about drinking Coca-Cola or Sanka coffee? "What do they think about the Democratic Party or ticket or the Republican ticket? " and you want to be smart, so you try to answer what the Church's policy is.
Chadwick is able to show that these statements always occur in talks given about other topics (not expressly about the date of Christ’s birth) and probably rely on Elder Talmage’s assumptions.
But a careful look at Doctrine and Covenants 20:1, upon which Talmage’s proposal is based, shows that this verse was not a revelation by the Lord about his birth date.
This passage says the Church was organized "one thousand eight hundred and thirty years since the coming of our Lord and Savior Jesus Christ in the flesh..the fourth month, and on the sixth day of the month which is called April." Many Mormons have taken this reference to be a literal count of the years from the birth of Jesus to the organization of the Church.