How long do day last on earth?

Answer 1

One Earth Day is equal to 23 hours, 56 minutes and 4.1 seconds (the time required to complete a single rotation of the Earth). The solar day (sunrise to sunrise) is longer, at 24 hours, within a 1 millisecond range. The day is currently increasing in length by about 1.4 milliseconds per century, as tidal forces from the Moon slow earth's roation.

The sunlit "day" is 12 hours long at the equator, but varies by latitude from season to season, due to the tilt of the Earth's axis to the plane of revolution.

24 hours.
Earth's days are 24 hours, but it takes 23 hours 56 minutes and 4.1 seconds for the Earth to rotate once.
About 12 hours if you don't count the night.