User blog comment:Martialmaniac/HxH timeline/@comment-4932025-20161212221030/@comment-5780397-20161213011033

I could agree in the case of Kurapika and Leorio, but Gon and Killua clearly stated they were 11 when they were taking the Hunter Exam. We know the dates of their birthdays, so they had certainly already turned 12 by the time Killua attempted the exam for the second time (and we can see he leaves GI on December 28, 1999). Among other things, we know for sure the chairman elections took place in August (which means they had both already turned 13), and the Black Whale's departure was on August 8th, so they are certainly 14 by now. All these elements are confirmed, I made sure myself.

We don't even know if the medic knew Gon at all, which can mean he made a guess about his age based on his appearance. His in-story age is certainly 14 by now, possibly still 13 when he last talked to Ging (I will check again). Maha's age has been changed according to the story. If we reject Gon's actual age, I think we contradict a lot more stuff than if we say he is 12 (which, again, could have been merely a guess). We should flag up the ambiguity, but since we have precise time coordinates, not using them as a reference does not seem right to me.