These terms are just made up so it doesn't matter, but I always read "90s kid" to mean your childhood was during the 90s, so you were BORN in the 80s (edit: or early 90s)
I was born in 92. My childhood (part of it, anyway) was in the 90s and I do remember the latter half of them fairly well. These things are never really clear cut, especially for people born around the "change" in generations.
Yea. I have 3 little brothers. All of them are gen Z. Being so exposed to the same things they were, I often feel I have a lot more in common with gen Z emotionally, but somehow more financially with millennials.
It's in the name. If you were a kid in the 90s, you're a 90s kid. Babies are not the same as kids. Kids can cover a wide range of ages, as they can be referred to as that their whole life with a certain kind of phrasing.
I get the line is debatable, but I feel like consistent early conscious memories is about the starting line for "kid". I've never really heard of it being used to mean when they're born in conversation.
This is just my experience, but I've never heard of this particular molehill.
Generally it refers to the decade you most associate with childhood memories. Usually babies are the decade before. So 80's babies are 90's kids. Of course this is all super generalized because humans are born everyday.