Nobody knows but it is not a guess. That would imply you could lob out almost any answer which would be very lazy (and indeed unscientific) scholarship.

Like we have references in multiple Gospels to him being born in the reign of Herod the Great so 1 AD is rather probably off because the man was already dead then. Though there is some dispute about when Herod died too. Ancient dates are hard and every nice pretty date you see comes from sorting out and connecting X year of so-n-so's reign or who was consul. And taking on faith your source remembered it right.

Meanwhile even discounting mentions of his birth Pontius Pilate was only governor of Judea for a limited period so one can work backwards from there as to what might be an appropriate age.

So Anno Domini is most likely late by a few years but probably still within a decade of whatever the real number is, which maybe isn't bad for work done in 525 on such a low key historical figure.