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Here is a time-lapse of the Earth, as seen from a geostationary satellite. Looking at the Northern Hemisphere, night is on the left and day is on the right.

This matches what we see from the ground. The northern Hemisphere gets more daylight hours for half the year and simultaneously the Southern Hemisphere gets fewer hours of daylight. This reverses after six months. On the equator, the days are always about the same length.

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Credit: NASA Goddard https://svs.gsfc.nasa.gov/11664