And how does that fact make Jesus NOT 33??
The date of Jesus' birth was not recorded, but neither was the date of His death. But we have a set of biographies that tell us that he was 33 when He died.
Given that information, YES, Jesus was born sometime in 4-6 BC. He lived 33 years, and thus died sometime between 27 and 29 AD.
the problem is with the different changes in the calendars throughout the last 2000 years. There are MANY differences between the Jewish Calendar, the Gregorian Calendar, and the Julian Calendar, all of which make an exact determination of Jesus' birth and death impossible.
But we KNOW from the written account by the Physician and historian Luke that:
"Now Jesus himself was about thirty years old when he began his ministry. " [Luke 3:23]
And by counting Passovers listed in the other Gospels we know that Jesus preached for three years.
It doesn't matter what year He was born. He was "about" 33 years old when he died.