2025 Equinox Calendar. Spring equinox 2025 (beginning of astronomical spring) on the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic. La page présente les dates précises des équinoxes et des solstices de l'année courante et des années à venir, jusqu'en 2025.

The spring equinox, known as the vernal equinox in the northern hemisphere, is a day on which the sun sits directly over the equator, so day and night all over the world are of equal length. A homegrown astronomical calendar for 2025.