You're asking about the time it takes a planet to orbit the sun. This is called a year.

Here are the approximate number of Earth days it takes for some planets to orbit the sun:

* Mercury: 88 days

* Venus: 225 days

* Earth: 365.25 days

* Mars: 687 days

* Jupiter: 4,333 days

* Saturn: 10,759 days

* Uranus: 30,687 days

* Neptune: 60,190 days

Let me know if you'd like more information about a specific planet's orbit!