Equinox 2025 Vernal. It is also the point in the calendar where the day length is more or less equal to the. The vernal equinox—the official start of astronomical spring—occurred on sunday, march 20, 2022 at 11:33 a.m.
In 2025, the official first day of spring is tuesday, march 19. Vernal / spring equinox 2025 the spring or vernal equinox marks the astronomical first day of spring.
