Yea for today! The days are getting longer and this evening it will officially be SPRING. We've had a beautiful week and for the last few days the temps have been in the 80s.
An equinox happens twice each year, in the spring and in the fall. On an equinox the tilt of the earth's axis is neither toward, nor away from the sun. The word equinox comes from the Latin aequus (equal) and nox (night), because around the equinox, the night and day are approximately equally long.
In spring in the Northern Hemisphere, the equinox typically happens on 20 or 21 March. Also, the equinox is not a whole day, it is a specific point in time. It happens when the centre of sun can be observed directly over the earth's equator. For those of us in the Central Time Zone of the US, that will happen at at 6:21pm CDT today.