Source: wikibot/spring-equinox
= Spring equinox
{wiki=Spring_equinox}
The Spring Equinox, also known as the Vernal Equinox, occurs around March 20 or 21 each year in the Northern Hemisphere. It marks the moment when the sun crosses the celestial equator, moving northward. On this day, day and night are approximately equal in length, which is why it's called an equinox (from Latin, meaning "equal night").