Here's why:

* Rotation: The Earth spins on its axis, completing one full rotation roughly every 24 hours. This rotation is what causes day and night. Noon occurs when the Sun reaches its highest point in the sky for a particular location.

* Revolution: The Earth orbits around the Sun, completing one full revolution in approximately 365 days. This revolution is what causes the seasons.

In simpler terms: Noon happens because the Earth is spinning, not because it's moving around the Sun.