Woohoo, we made it!
It's the spring equinox, which means in the northern hemisphere, day will now start being longer than night.
The word “equinox” comes from two Latin words: “aequi-” (meaning “equal”) and “noct-” (meaning “night”).
The spring equinox is also sometimes called the vernal equinox, and "vernal" also comes from Latin, this time “vēr,” meaning "spring."
Finally, an editing tip: "spring equinox" is not capitalized.