As the earth rotates on its axis, one side will face the sun , that side will get day and the other side will be dark, so that side will have night.
earths rotation
The earth's rotation is described as a counter-clockwise movement which passes through the north and south poles. This is what will result to day and night.
There is no point on the earths surface that experiences night for 24 hours every day.
the earths rotation
rotation
rotation
equinox
Because it tilts on its axis
rotation
rotation
The Earth's rotation creates day and night as different parts of the planet are exposed to the sun's light at different times. This movement is what causes the sun to appear to rise in the east and set in the west each day.
day and night