Day Length

Here are the planets in the solar system arranged in order of increasing day length:

1. Jupiter - 0.41 Earth days
2. Saturn - 0.45 Earth days
3. Neptune - 0.67 Earth days
4. Uranus - 0.72 Earth days
5. Earth - 1 Earth day (24 hours)
6. Mars - 1.03 Earth days
7. Mercury - 58.6 Earth days
8. Venus - 243 Earth days

Note that the day lengths listed above are approximate values and are given in Earth days. The day lengths of the planets vary greatly depending on their size, rotation rate, and internal structure.