So, 36 is "about 30"?
Tiberius Caesar was ruler in the provinces for two years before Augustus Caesar died. That's when his rule began. He may not have ruled all the empire, but that's when his rule began.
So, The rule of Tiberius began in 12 AD. The 15th year of his rule would be about 26-27 AD. (By "about", I don't mean a six year spread, either.)
He was baptized and then began his public ministry, and we are told that he began his public ministry when he was about 30. (BTW, by standard usage, 36 would more likely be "about 40"; but, firstborn sons entered public service at 30, which is what he would have done.)
Give him 3 years of public service, and that would have put the crucifixion in 29-30 AD.
29 AD is the year that fulfills all the prophecies, including the types given in the Feasts. About 33 years earlier, all the prophecies, including the Feasts were fulfilled concerning his birth.
I don't think God does things halfway.
"Oh, well, these years don't meet the prophecies and the types, but they're close enough!" I don't think that's God's attitude at all. God is perfect.