21/09/2026
The equinox marks the exact moment the sun crosses the celestial equator, resulting in day and night of approximately equal length worldwide
Astronomical Explanation
Position of the Sun: The sun sits directly above the Earth's equator, meaning neither the Northern nor the Southern Hemisphere tilts toward or away from the sun.
Day and Night Equality: The word equinox comes from the Latin words aequus (equal) and nox (night). While day and night are not quite 12 hours flat due to atmospheric refraction, they are nearly identical in duration.
Hemispheric Shift: In the Northern Hemisphere, it marks the transition from summer to astronomical autumn. In the Southern Hemisphere, it signals the vernal spring equinox