This September 23rd begins the Autumn Equinox

The Autumn Equinox is an astronomical event that represents the change of seasons during the year: September 23 in the Northern Hemisphere and March 20 in the Southern Hemisphere, marking the beginning of autumn. The word equinox comes from the Latin aequinoctium (aequus nocte) which means “equal night”, referring to the same duration of day and night, which take place in the spring and autumn equinoxes.

When is the Autumn Equinox?

An equinox is an astronomical event that occurs when the sun is located directly above the planet’s equator, with the same duration of days and nights. This is because the Earth’s equator aligns with the Sun, so that sunlight is distributed evenly over both hemispheres. The planet’s orbit lasts 365 days and rotates with an inclination of 23.5 degrees, where the northern and southern hemispheres are closer or farther from the sun’s rays, causing the same amount of light and darkness in a day, twice a year.