Equinox Calculator
Find the exact dates of spring and autumn equinoxes for any year.
Select Year
What is an Equinox?
An equinox occurs when the Sun is exactly above the equator, making day and night approximately equal in length worldwide. The March equinox marks spring in the Northern Hemisphere, while September marks autumn.
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March Equinox 2026
Friday, March 20, 2026
14:40 UTC
Past
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September Equinox 2026
Wednesday, September 23, 2026
00:13 UTC
119 days away
Equinox Facts
Northern Hemisphere
March = Spring (Vernal) Equinox
September = Autumn (Autumnal) Equinox
September = Autumn (Autumnal) Equinox
Southern Hemisphere
March = Autumn Equinox
September = Spring Equinox
September = Spring Equinox
Day Length
Nearly equal day and night (~12 hours each) worldwide
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.