Earth's orbital period is approximately 365.25 days, which is why we have a year.

However, other planets have different orbital periods:

* Mercury: 88 days

* Venus: 225 days

* Mars: 687 days

* Jupiter: 12 Earth years

* Saturn: 29 Earth years

* Uranus: 84 Earth years

* Neptune: 165 Earth years

The further a planet is from the sun, the longer its orbital period. This is because the gravitational force between the sun and the planet is weaker, and the planet needs more time to complete its orbit.