This is called a sidereal day. On Earth, a sidereal day is almost exactly 23 hours and 56 minutes.
We can write a paragraph about how long days last on other planets. On Mercury a day lasts 1,408 hours, and on Venus it lasts 5,832 hours. On Earth and Mars it’s very similar. Earth takes 24 hours to complete one spin, and Mars takes 25 hours. The gas giants rotate really fast.
Uranus. 17 hours. Neptune. 16 hours. When you think of a day, you normally think of one cycle of daytime to nighttime. That is called a solar day. On Earth, a solar day is around 24 hours.
This first graph will only have Earth, Mars, Jupiter, Saturn, Uranus, and Neptune on it. We’ll save Mercury and Venus for later. You'll see why in a minute. The longest day among those planets is 25 hours. That means our number line will go up to 25.