I’m still in my 20s, but as of a few years ago I started forgetting what’s my exact age. I always have to stop and recalculate it each time someone asks me. I get asked fairly infrequently, but when I do it’s a bit weird/embarrassing that I have to say “wait, let me calculate”. (I know when I was born, of course.)
It seems as if there’s no good reason I’d remember it, since it changes all the time and it is rarely mentioned in practice. But others, including people much older than myself, know their own age immediately.
I’m also terrible at remembering people’s names, I don’t know if that could be related?
I did and I don’t even know how long I was wrong or when I lost track. I thought I was 27. I signed up for some forum and put in my birthday on my profile and it automatically put my age on my bio. I was like ‘lol stupid website that’s wrong’ then I did the math and realized that I was the stupid website that was wrong.