User blog comment:Martialmaniac/HxH timeline/@comment-30484460-20161214062633/@comment-4932025-20161216000349

Well there's a coherent timeline that can be traced through all the dates we've been given, we know Gon's birthday and we know the calendar year for the current events in the manga so Gon still being 12 does infact contradict the timeline of events, it's just the way it is. You're denying it because a fan put it together but the dates are right there in the manga.

With that said we're not denying that Gon's current age is 12, if Togashi says he's 12 then he's 12, that's his current defacto official age so like I said canon words > the timeline and since it is a fact Killua is the same age as Gon, he's 12 too, Gon and Killua being 14 years old through interpretation of the timeline is still worth mentioning imo, so I am for both coexisting.

Also Martialmaniac when you increase/deduct/interpret other characters age based on the timeline, do add (By the timeline) next to the character's age for the sake of clarity.