the time it takes the earth to spin around on its axis
The rotation of Earth on it's axis
the length of day on earth is 24 hours
Depends on where you are (latitude) and the time of year.
The length of night and day depends on how fast a body like Earth is spinning. Of curse, the body's tilt with respect to its star - Sun in Earth's case - continually alters the lengths of days and nights according to the 4 seasons.
the time it takes the earth to spin around on its axis
spinning
The rotation of the earth causes night and day.
How long it spins on it's axis
Mars
The earth day is Approximately 24 hours in Length.
The length of a "day" on the moon is 29 Earth days.
If you mean the length of the day, yes - that is the same around the Earth. The Earth rotates as a rigid body. If by day length you mean hours of sunlight. On the same lines of latitude day length will be the same, but due to the wobble in the rotation of the earth, day length is different along lines of longitude.
243 Earth days