Question

Why does the whole Earth not get day at the same time?? Explain it briefly​

Answer 1

Answer:

Rotation of the Earth causes night and day to alternate. Since we learned that the Earth's axis is tilted and hence the equator is not facing the Sun directly, different places on Earth would experience unequal length of days and nights—not exactly 12 hours of day and 12 hours of night all the time.

Answer 2

Answer:

The Earth rotates on its own axis from west to east in 24 hours and around the Sun in a year. ... As the axis of the Earth is tilted, days and nights are not equal: day and night do not last 12 hours each but their length changes over the year as the Earth rotates around the Sun and its position changes.