Length of a day?
It's unlcear to me what you mean by this question.
are you asking how long is a day? or in a special unit?
If you're asking how many hours are in a day, then I'm wondering about your intelligence levels...
There are 24 hours in a day, 1440 minutes in a day, and 86400 seconds in a day.
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.