2024 Solstices And Equinoxes Dates. United states equinox and solstice dates an equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length. But what do solstices and and equinoxes actually mean, and why do we mark them on our calendars?.
This page will calculate when the equinoxes and solstices are for a given year. Equinoxes and solstices are two of the most important celestial events on earth.
