When is a BP consider an adult?

[Hock3ymonk3y]

I believe when a ball python turns 5 years of age it is considered an adult. Here, I hope you get this:
Hatchling- 1 day to 1 year old
Juvenile- 1 year old to 3 years old
Sub adult- 3 years old to 5 years old
Adult- 5+ years old

I think I'm correct, but anyone correct me if I'm wrong.

You forgot yearling and my snake is a little less than a year old but is 500g. I would not consider that a hatchling...