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 2666?

Tuesday, 20 March 2666

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 2666?: Spring Equinox 2666 is on Tuesday, 20 March 2666.
What day of the week is Spring Equinox 2666?: It falls on Tuesday.
How is Spring Equinox calculated?: This event is based on the astronomical moment when the Sun crosses the celestial equator heading northward each year.