Spring Equinox 2025 Northern Hemisphere Map. The date and time at which the centre of the sun is directly over the equator in late september is called the equinox—from the latin for 'equal night'. 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.

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. This is also the first day of.