Sunset is a celestial phenomenon characterized by the disappearance of the Sun below the Earth's horizon as a result of the planet's rotation. It occurs approximately once every 24 hours across most locations on Earth, with the exception of areas situated close to the poles.
The specific direction of the sunset varies based on geographic location and season. During both the spring and autumn equinoxes, the Sun sets due west regardless of the observer's position. In the Northern Hemisphere, the Sun sets toward the northwest during the spring and summer, while it moves toward the southwest in the autumn and winter; these seasonal patterns are reversed in the Southern Hemisphere.