Question

Why do people say that the sun set when it doesn’t

Answer 1

The sun stays in its position at the center of our solar system. it doesn't rise and set. But is appears to rise and set because  of the earths rotation on its axis. As the earth rotates toward the east it looks like the sun is moving west

Answer 2

It stays in one position in our eyes. The Sun, the Moon, the planets, and the stars all rise in the east and set in the west. And that's because Earth spins -- toward the east. ... Earth rotates or spins toward the east, and that's why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky.