How many days untilSeptember Equinox
September Equinox 2025 falls on September 22, 2025. See how much time has passed since that holiday date.
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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.
September Equinox 2025 Date Information
September Equinox 2025 falls on Monday, 22 September 2025. This section highlights the exact date, weekday, and where the holiday lands within the year.
Full Date
Monday, 22 September 2025
Day of Year
Day 265
Days Left in Year
100 days
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When is September Equinox 2025?
When is September Equinox?Is it September Equinox today?
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Frequently Asked Questions about September Equinox
September Equinox 2025 was 254 days ago on Monday, 22 September 2025.