Mars
Mars.
Mars has a day of 24 hours 39 minutes and 35 seconds
24 hours.
Mercury.
i dont know yet
by the rotation of the planet
The tides are slowing the earths rotation and making the day longer.
I think that the sun doesn't have any length of day, because of the heat and how the planets revolve around the sun.
Earth has a 24 hour day and Mars has a 25 hour day.
23 Hours 57 Minutes and 14 Seconds
The length of the day
Rotational time of the planets is random (the length of the planet's day), but the outer planets do spin faster than the inner planets.