Seasons
How many days untilSeptember Equinox
September Equinox 2026 falls on September 23, 2026. Review this year's holiday date and countdown details.
Wednesday, September 23, 2026 at 8:05 AM GMT+8Northern Hemisphere
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About September Equinox
The September Equinox brings day and night back into near balance and marks the start of astronomical fall in the Northern Hemisphere. Leaves begin changing color, temperatures ease down, and many places shift into harvest and back-to-school rhythm. In the Southern Hemisphere, this same moment marks the start of spring.
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When is September Equinox 2026?
When is September Equinox?Is it September Equinox today?
Find out if it's September Equinox todayRelated Dates
Frequently Asked Questions about September Equinox
There are 112 days until September Equinox on Wednesday, 23 September 2026.