Well, I’m 20 and I still call my dad “daddy” most of the time. When I’m talking about him I say dad, but if I’m addressing him it’s usually Daddy. I never called my mom “mommy” that much, but I call her that sometimes, like if we’re being goofy or something. But usually it’s Mom or Momma. I don’t think there’s an age where it’s weird to call them mommy or daddy…my mom still calls my grandpa Daddy…it’s just a term of endearment, as long as it’s not said in public when you’re over the age of 14 I think it’s fine, lol.
Edit: okay, thinking about it more, it would be kinda weird for a guy over the age of 10 or 11 to call his mother mommy…for some reason I don’t think it’s weird for girls though…hm.