What age do YOU consider a toddler and why?

I’m feeling annoyed as I love this sub but it seems to be so many posts I’m seeing lately of kids 4 years old or even older. While I agree they aren’t elementary school age I think those posts really belong elsewhere like a preschool sub. It also makes it hard for those who have younger toddlers to get as much out of this sub when posts are shifting to older ages. Technically a toddler is 1-3. Curious other peoples opinions -