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Autumn Equinox

September 23


Equinoxes are opposite on either side of the equator, so the autumnal (fall) equinox in the Northern Hemisphere is the spring (vernal) equinox in the Southern Hemisphere and vice versa.

On the two equinoxes every year the Sun shines directly on the Equator and the length of day and night is nearly equal – but not exactly.

The September equinox marks the moment the Sun crosses the celestial equator – the imaginary line in the sky above the Earth’s equator – from north to south and vice versa in March.

When is the Equinox in my City?

Details

Date:
September 23
Event Category: