How is Spring Equinox calculated?

This event is based on the astronomical moment when the Sun crosses the celestial equator heading northward each year.

When is Spring Equinox 2109?

Wednesday, 20 March 2109

Spring Equinox marks the astronomical moment when day and night are nearly equal and the Sun crosses the celestial equator northward, signalling the start of spring in the Northern Hemisphere.

Also known as

Vernal Equinox
Northward Equinox

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Frequently asked questions

When is Spring Equinox 2109?: Spring Equinox 2109 is on Wednesday, 20 March 2109.
What day of the week is Spring Equinox 2109?: It falls on Wednesday.
How is Spring Equinox calculated?: This event is based on the astronomical moment when the Sun crosses the celestial equator heading northward each year.