When Is Spring Equinox 2025. Find out the date when march equinox is in 2025 and count down the days until march equinox with a countdown timer. The spring equinox, also known as the vernal equinox or march equinox, marks the beginning of spring in the northern hemisphere.

How long does autumn last? Vernal / spring equinox 2025 the spring or vernal equinox marks the astronomical first day of spring.