# Would the rotation of a Jupiter sized Earth be any different, both spinning and orbiting around the sun? Would we have longer or shorter days?

The orbital period $T$ in years of all bodies in the solar system is directly related to the semi-major axis distance $a$ is AU by Kepler's third law ${T}^{2} = {a}^{3}$. So, as long as Earth is the same distance from the sun, the year will always be the same.