From the WP
This year’s equinox — which occurs Wednesday at 5:58 p.m. Eastern time
Though “equinox” comes from the Latin words “aequus” (equal) and “nox” (night), both of Earth’s hemispheres actually see slightly more than 12 hours of daylight on the equinox.
Vernal comes from latin also, meaning spring.
Here’s a cool graphic from Wikipedia