Apparently, nothing actually happened in the prophetic biblical sense. I believe that the 2300 evenings and mornings (see Daniel 8:14) are measured in years and begin at the time that the decree was made to restore Jerusalem (see Daniel 9:25). But when the termination of that time sequence occurred, that is what is in question. One of the biggest problems with the 1844 termination date resides in the criteria specified in the "midst of the week" portion of Danial 9:27. That is the point in time where the death of Christ occurs. 


Astronomically speaking, if he died at the Passover of AD 31, his death would have taken place on a Tuesday or Wednesday. But the scriptures are pretty clear that his crucifixion took place on a Friday. If that was the case, then either AD 30 or AD 33 would have been the Crucifixion year. AD 30 appears to be the year of his death as we gather together more data on the chronology in the scriptural accounts of the New Testament. 


This means that all the measurements of time used to determine the 2300 day prophecy of Daniel 8 and 9 needs to be set back one year and terminate in 1843. “I have seen that the 1843 chart was directed by the hand of the Lord, and that it should not be altered; that the figures were as He wanted them; that His hand was over and hid a mistake in some of the figures, so that none could see it, until His hand was removed.” (Early Writings pg. 74). 


My question would be to the SDA's: Why are you trying to prove an 1844 fulfillment year for the end of the 2300 day prophecy, when your prophet is being shown that 1843 was the termination date? 


"Some have feared that if in even a single point they acknowledge themselves in error, other minds would be led to doubt the whole theory of truth. Therefore they have felt that investigation should not be permitted, that it would tend to dissension and disunion. But if such is to be the result of investigation, the sooner it comes the better. If there are those whose faith in God's word will not stand the test of an investigation of the Scriptures, the sooner they are revealed the better; for then the way will be opened to show them their error. We cannot hold that a position once taken, an idea once advocated, is not, under any circumstances, to be relinquished. There is but One who is infallible--He who is the way, the truth, and the life" {Ellen G. White - Testimony to Ministers 105.2}.