The Spring Equinox, also known as the vernal equinox, is one of the four solar festivals of the year. The equinox — which translates roughly in Latin to “equal night” — is when the sun sits vertically above the equator, making day and night equal across the planet. The Spring Equinox officially marks the beginning of spring in the Northern Hemisphere, and there are celebrations around the world to usher in longer days and springtime. In some cultures, this day also marks the beginning of the new year, which in Iranian culture is called Nowruz. The Spring Equinox is a brilliant time for new beginnings, no matter how you celebrate on March 20.