Troubleshooter

If you start calculating the seventy weeks (seventy-sevens) Daniel 9:24 from 457 BC...
...and you insist on a strict fulfillment...
...you must include 31 AD in the time-line to get to 1844...
...but there are other criteria to meet to make 31 AD a viable year for the crucifixion.

Following is the criteria that must be satisfied to establish a viable date for the crucifixion.

It must be in the spring in the month following the Barley harvest.
In the month Nisan (Abib). Deut. 16:1
On the 14th day of that month. Lev 23:5
On the sixth day of the week. John 19:31
On a 'Preparation Day' (day before the Sabbath) Matt 27:62
On a night of a full moon.
Coinciding with a Passover. Lev 23:5
The beginning of the feast of unleavened bread. Ex 12:18
Coinciding with a weekly Sabbath. Matt 28:1-2, John 19:31-32
The Wave Sheaf Offering and Resurrection day must coincide. Lev. 23:9, Mark 16:9
During the reign of Pontius Pilate Matt 27:2

All this criteria can not be satisfied in 31 AD...
...if you run the current Julian/Gregorian weeks back the crucifixion occurs on a Wednesday/Thursday.

Using a Julian/Gregorian calendar a Friday/Saturday can only be satisfied in 30 AD and 33 AD.

However, William Miller was able to satisfy the criteria by using the Karaite luni/solar calendar...
...because with a lunar calendar the criteria is satisfied every year...
...because a weekly Sabbath did not have to fall on a Saturday...
...and the 15th Nisan was always a weekly Sabbath...
...so 31 AD could fit his interpretation of the prophecy and get him through to 1844.

Wouldn't it be ironic if the dating of the death of Christ is the death of 1844 and Seventh-day Adventism?