The autumnal equinox occurs on Monday, marking the beginning of fall in the Northern Hemisphere and spring in the Southern Hemisphere. This event, celebrated globally for centuries, signifies equal day and night. Sunlight will decrease daily until the winter solstice. A partial lunar eclipse might be visible in parts of the Southern Hemisphere. The equinox is caused by the Earth's axis aligning with its orbit, resulting in equal sunlight distribution. Meteorological seasons, defined by temperature cycles, differ from astronomical seasons based on Earth's movement around the sun.

Prepared by Olivia Bennett and reviewed by editorial team.