When did Saturn the planet become a planet?

Answer 1

Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter.

Saturn's interior is probably composed of a core of iron, nickel and rock (silicon and oxygen compounds), surrounded by a deep layer of metallic hydrogen, an intermediate layer of liquid hydrogen and liquid helium and an outer gaseous layer

for more detail see http.www.entrancei.com

Answer 2

Saturn never became a planet it was always a planet.

Saturn has been visible in the night sky since people first looked up into the night sky.

Answer 3

Yes. It couldn't have been anything else.