March 2025 Spring Equinox. The vernal equinox, also known as the spring equinox, occurs exactly at 11.06pm eastern time on tuesday 18 march 2025. The vernal equinox arrives on tuesday, march 19, marking the start of the spring season for the northern hemisphere.
Whether you will celebrate a spring equinox or an autumn equinox this march, plan to include geocaching in your equinox celebrations to earn a souvenir! In 2025, the vernal equinox occurred on march 19, signaling the start of spring in the northern hemisphere (and fall in the southern.