As the Earth orbits the Sun it spins on its axis once every 24 hours. We call
this time one day.
In one day every point on the Earth's surface will come out of
night, go through a day, dusk and then into night once more.
Note: This diagram is not to scale. If you view this file with the Earth shown as a disc about 5 cm in diameter the Sun would be a disc over 5 m in diameter and nearly 600 m away!