The eight planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune have different rotation and orbital periods. **A day and year on each planet** are the rotation period and orbital period respectively.

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When a planet completes one rotation around its axis, called a day of the planet. Whereas one year of a planet is the orbital period around the sun of the planet“.

Here in this article, we have mentioned days and years on every planet. So if you have any questions such as:

*How long does it take for the planets to orbit around the sun?**What planet has the longest year?**What planet has the longest day?**How many days are in a year on each planet?**Which planet has the shortest day?**How many hours exactly in a day on earth?**A day and year on planets in order!*

*And many more questions regarding the hours, days, and years are given here. *

**A day and year on each planet**

We have given the “**how long a day and year**” details for every planet of our solar system. The days and years are mentioned here are with respect to the earth’s days and years. Tables are included for an easy way to understand it:

**How long a day and year on Mercury**

Mercury is the smallest and nearest planet to our sun. It takes very little time to complete one orbit around the sun compare to other planets. So Mercury planet has the shortest year than other solar system planets.

Planet |
Mercury |

Rotational Period (1 Day) |
58 days, 15 hours, 30 min ≅ 58.6 days |

Orbital Period (1 Year) |
87.97 days |

**How long a day and year on Venus**

Planet Venus is the 2nd distant planet from the sun. One of the best facts about Venus is “one day is longer than one year on Venus”. Venus-Planet has the longest day compare to all other planets.

Planet |
Venus |

Rotational Period (1 Day) |
243 days |

Orbital Period (1 Year) |
224.7 days |

**How long a day and year on Earth**

Usually, we know one day on earth is 24 hours time period. Whereas one year is 365 days. But this is not the exact value of a day and year on the earth.

Planet |
Earth |

Rotational Period (1 Day) |
23 hours, 56 min, 4.1 sec ≅ 24 hours |

Orbital Period (1 Year) |
365.2425 days ≅ 365.25 days |

**How long a day and year on Mars**

Planet Mars is the 4th planet from the sun and is located between the earth and Jupiter. One day on Mars is nearly matching with the one day on the earth.

Planet |
Mars |

Rotational Period (1 Day) |
24 hours, 39 min, 35 sec ≅ 24.65 hours |

Orbital Period (1 Year) |
687 days ≅ 1.88 years |

**How long a day and year on Jupiter**

Jupiter is the fifth planet from the sun and is the largest in our solar system. Planet Jupiter has the shortest day compare to all other planets.

Planet |
Jupiter |

Rotational Period (1 Day) |
9 hours, 55 min, 40 sec ≅ 9.92 hrs |

Orbital Period (1 Year) |
4333 days ≅ 11.86 years |

**How long a day and year on Saturn**

Saturn is the 6th planet from the sun and is the second-fastest planet to complete one day after Jupiter.

Planet |
Saturn |

Rotational Period (1 Day) |
10 hours, 33 min ≅ 10.55 hrs |

Orbital Period (1 Year) |
10759 ≅ 29.46 years |

**How long a day and year on Uranus**

Uranus is the 7th planet from the sun and is the largest ice giant planet.

Planet |
Uranus |

Rotational Period (1 Day) |
17 hours, 14 min ≅ 17.23 hrs |

Orbital Period (1 Year) |
30687 ≅ 84.01 years |

**How long a day and year on Neptune**

Neptune is the farthest planet of our solar system. It is the planet that has the longest year.

Planet |
Neptune |

Rotational Period (1 Day) |
16 hours, 6 min ≅ 16.10 hrs |

Orbital Period (1 Year) |
60190 days ≅ 164.8 years |

**How long a day and year on Pluto**

Pluto used to be the ninth planet of our solar system, but it is no more a planet. IAU has categorized it as a dwarf planet, located in the Kuiper belt region.

Planet |
Pluto |

Rotational Period (1 Day) |
6 days, 9 hours, 36 min |

Orbital Period (1 Year) |
90560 days ≅ 247.94 years |

So here it was the time period of a day and year on each planet including the dwarf planet Pluto. I hope you have liked it. Must read the below relatable posts for more information about the planets of our solar system.

**Related: **

Read here about all planets:-

- Planet Books: Books about Planets (All Aged Kids)
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- 11 Best Space Gifts for Christmas {Kids of All Ages}