Disillusioned JW:
That is because I didn't know the precise time period when the Jews were looking for the Messiah based upon calculations of Daniel (assuming the WT's claim was correct), and because I also didn't remember for certain the precise year (whether calculated by the WT or by various non-JW scholars - and scholars disagree as to what year Jesus began his ministry) began. It doesn't matter to me if the year was 26 C.E. or 30 CE.
There is no evidence that anyone in the early first century was using Daniel to calculate the arrival of the messiah in 26, 29, 30 or any similar year. The early ‘church fathers’ didn’t even suggest such a thing until the late second century. (Did you read the article I linked a few days ago?)
Insufficient time right now for full details but 30 (or 29) is insisted by some religious people because of the tradition that he was born closer to ‘0AD’ and also because of Christian interpretations of the ‘70 weeks’.