You think they would at least give mention to some of them

Doubt it

It'd be kinda funny if a whole year passes in Danmachi and Bell is still listed as 14 years old. really hope they don't forget to update that.

If the translator did its job correct, in the interview Oomori said that he didn't wanted to change Bell's age through the story.

as Omori does not want to change Bell's age, the story will end in a year, that means they will not celebrate Bell's birthday or he went to Orario on his birthday

Or the author might completely ignore Bell's age and just says he's 14 throughout the whole story without a second thought.

He did say that he want to end the story in the year mark so he won't ignore it, just end the story before Bell's birthday happens.

If I'm correct, the show at some point states he's a Virgo, so we can go within that. Along with Aiz Being an Aries. In an Episode they went off Zodiacs with Welf in the dungeons. No birthdays though! They might let us know in the 4th season.

Season 4 is gonna be volumes 12 to 14. We are already in volume 16 and he is still 14 years old.

Also, it is never said that he is Virgo, or anyone's sign for the matter. Moreover, if Bell was Virgo it would had already been his birthday, as it has been 6 months since the start of the story and autumn has just started.

Oomori already stated it, he doesn't want to change Bell's age through the story. So he is not gonna become 15 regardless of how much people want it.

Darn it, you think they would at least give a range of date to work with, like, maybe Bell turned 14 when his grandfather died which is why he didn't age, that way, we won't be as butthurt about it