On an equinox, day and night are of approximately equal duration all over the planet. They are not exactly equal, however, due to the angular size of the sun and atmospheric refraction. The word is derived from the Latin aequinoctium, from aequus (equal) and nox (genitive noctis) (night).
It was a beautiful day and on our way through the neighborhood the evening sun hit this maple so magically I had to hop off my bike to snap this:
Have a great weekend