Here are the problems I see with this calculation:
(1) Daniel 9:25 refers specifically to the rebuilding of Jerusalem and not the wall, gate, and a house as with the decree you refer. Therefore I believe the correct decree is from Ezra 7 as this specifically refers to the rebuilding of Jerusalem. The date for this decree was 457 B.C. I do not dispute the date 455 B.C provided but believe it is the wrong decree.
(2) Daniel 9:26 refers specifically to the crucifixion after the designated period. There is no mention of Jesus' Baptism at all in Daniel 9.
(3) The 69 weeks (483 years) you refer will also include another 1 week in Daniel 9:27. So it is just another way of referring to the 70 weeks (490 years), but breaking it down into 7 weeks (49 years) for the rebuilding of Jerusalem, then 62 weeks (434 years), and then the anointed one is cut off and the covenant is established in the final week (7 years). In this way the years that includes Christ's ministry are emphasised as well as the building of Jerusalem.
There is more I could say about the final week (seven years) from the prophecy but we need to agree on the above first.
Best wishes
I think I agree about Jerusalem, and wonder why you stressed Jerusalem's wall/gate.
There would be 70 weeks of years to finish off sin. Starting from the going forth of the word to restore and rebuild ' Jerusalem ' until Messiah the Leader, there will be 7 weeks, also 62 weeks.........Daniel 9:24-25
Having ' Jerusalem ' rebuilt would mean worship would be restored, and Messiah would appear at a specific time.
Thus, that is why the first-century people were in ' expectation ' of Messiah at that time according to Luke 3:15
In the Tanakh footnote of Daniel 9:24 reads:
70 weeks of years are destined for your people and for your holy city. ( that city would be Jerusalem )
That is also similar to Moffatt and Rotherham.
The 70 weeks are divided into 3 periods:
1) 7 weeks
2) 62 weeks
3) 1 week
That would be 49 years, 434 years and 7 years = total 490 years.
So, following the exile from Babylon for 70 years, the Israelites would experience God's favor for 490 years, or 70 years multiplied by 7.
I think we agree the starting point would be from the going forth of the word to restore and rebuild: 'Jerusalem '
Beginning of the 70 weeks when Cyrus issued his decree in 537 BC restoring the Jews to their homeland.
- Ezra 1:2-4
Secondly, then is Ezra 7:6-27
Third, takes place 13 years later in the 20th year of Artaxerxes when Nehemiah was cupbearer at that time.
Nehemiah learned the wall of ' Jerusalem ' was broken down and its gates burned down.
That news disturbed Nehemiah which cased Artaxerxes to question Nehemiah about his sadness.
- Nehemiah 1:1-3; 2:1-3; 2:4-8
The actual effect to restore-and-rebuild ' Jerusalem ' would take place months later.
That would mean when Nehemiah actually arrived in ' Jerusalem ' and begins restoration of ' Jerusalem '
So, even though permission was given in the Jewish Spring month of Nisan, the actual going forth came later.
That could place Nehemiah's arrival in ' Jerusalem ' at 455 BC which would end in the year 36 when Jesus died.
( To me, secular Persian history establishes that 455 pivotal date - Nehemiah 2:1-5)
Messiah presents himself at age 30 for baptism counting 483 years (49 + 434) from 455 BC brings us to year 29.
- John 1:32-34; Luke 3:1-3,15 - so, at his baptism Jesus became Messiah, the Anointed One or Christ.
Thus, Messiah the Leader appeared exactly on time at the end of 69 weeks of years. - Mark 1:10-15
Jesus ministry began in the year 29 lasting for 3 1/2 years, or in other words, Jesus was later ' cut off ' in death in the Spring month of Nisan in the year 33.
Messiah appears (Daniel 9:25), then Messiah, at 3 score and 2 weeks, Messiah is cut off (Daniel 9:26 )