[justiceseeker93]

If an Amelekite is going to craft his own bio, he'd pick a symbolic birthdate out of the standard calendar of the nations.

Interesting thought about possibly making up the birth date. Well, if the birth place and the parents are still subject to debate, why not the birth date as well?

[Ezekiel]

Regarding the destruction of the Temple, it is interesting that there is the [mistaken] belief that tribal genealogical records were also destroyed.

So... fabricated or not, the One's birthdate provides a clue that all that is hidden will be revealed, despite the best efforts of multiple layers of deceivers. Zero may think all the birth records have been destroyed but in the end, Zero gets away with exactly nothing.