What Is Spring Equinox 2024 In India. March 19 celebrates the arrival of the annual astronomical event, signally. During the penumbral phase, the moon passes through earth’s penumbra, the outer part of its shadow.

When it is, why it happens and what to look for. The vernal equinox, occurring on march 19 to 21, signals the moment when the earth’s axis aligns with its orbit around the sun, resulting in equal daylight and darkness across both hemispheres.