Spring 2025 technically begins at 5:01 a.m. Eastern time that day as the sun moves directly over the Earth’s equator — the central line between the North Pole and the South Pole — bringing almost equal minutes of daylight and darkness all around the globe.

The spring equinox marks the start of astronomical spring. The date is determined by the Earth's tilt on its axis as it travels around the Sun. At the equinox, the Earth's axis is tilted neither towards nor away from the Sun, making day and night nearly equal in length. The equinox happens twice a year - in March and in September.

The vernal equinox heralds the arrival of spring in the Northern Hemisphere (finally). But have you heard the myth about balancing an egg on its end?