09/21/2026
THE FALL SEASON to begin tomorrow!
The sun is setting sooner, the temperatures are cooling, and the leaves are changing. The autumn equinox in 2026 occurs on Tuesday, September 22, at 5:05 p.m. PDT (8:05 p.m. EDT / 00:05 UTC on September 23), according to the Griffith Observatory.
Key Facts About the 2026 EquinoxAstronomical Start:
-This precise moment marks the official start of astronomical fall in the Northern Hemisphere and astronomical spring in the Southern Hemisphere.
-Position of the Sun: The Sun crosses directly over the Earth's equator heading south during this event.
-Day and Night Length: Despite the word "equinox" translating from Latin as "equal night," day and night are not precisely 12 hours long on this day due to atmospheric refraction of sunlight.