### 18 Answers

- JimLv 71 year ago
In 1960, the second was redefined in terms of the orbital motion of the Earth in year 1900, and was designated the SI base unit of time. The unit of measurement "day", was redefined as 86,400 SI seconds and symbolized d. In 1967, the second and so the day were redefined by atomic electron transition.[3] A civil day is usually 86,400 seconds, plus or minus a possible leap second in Coordinated Universal Time (UTC), and occasionally plus or minus an hour in those locations that change from or to daylight saving time.[4][5]

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- 1 year ago
Depends on if you're referring to a solar day or a sidereal day. A solar day is exactly 24 hours because it measures when the sun will be back at the same position in the sky. A sidereal day is the actual time it takes for the earth to make one full revolution, which is about 4 minutes shorter. The difference is there to account for the fact that the Earth also moves in its orbit.

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- RealProLv 71 year ago
Once you're done counting the hours, the entire day has passed so our answer is 0.

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- Anonymous1 year ago
One .

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And abnormally?