Why The Fall Equinox Is More Than Just Equal Day And Night
• The autumnal equinox on September 22, 2025, marks the official start of fall, when neither hemisphere is tilted more towards the Sun.
• The equinox signifies nearly equal day and night, but true equality (equilux) occurs a few days later due to atmospheric refraction.
• The autumnal equinox symbolizes change and transition, highlighting the Earth's relationship with the Sun and the shifting seasons.
Fall officially starts September 22nd, 2025
The fall season officially commences with the autumnal equinox, a celestial event occurring on September 22, 2025, at 2:19 p.m. EDT. This marks the moment when Earth's axis reaches a point where neither the Northern nor the Southern Hemisphere is tilted more towards the Sun. Although meteorological summer concluded on August 31, astronomical summer extends further into the year, culminating in the equinox.
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