User blog comment:Martialmaniac/HxH timeline/@comment-4932025-20161212221030/@comment-4932025-20161213164704

1- Yes.

2- No, since we don't know with absolute certainty which point the databook is referring to

3- No, again unless we know a character's birthday then don't do it, we don't actually know if it's 57 years old prior to the story or prior to a certain arc, no one knows at what exact point in time she was that age.