Tuesday morning at 4:19am will mark the spring equinox. But what does that mean? The equinox is the point in the year when the tilt of the Earth's axis is neither toward nor away from the Sun. This creates nearly equal lengths of day and night across the globe. An equinox occurs twice in the year: in autumn and in spring. At the equinox, the Sun appears to be positioned directly above the Earth's equator. After the spring equinox, the Earth's tilt means that, as we make our way around the Sun, i