The spring equinox is one out of only two days each year when the days and nights are both exactly 12 hours long. Throughout the winter months, the sun sets much earlier than it does during warmer months and as the calendar crawls closer towards spring the sun stays out for a little bit longer each day.
When the day of the spring equinox is finally reached, the amount of daylight is equal to the amount of darkness during the night. In fact, this is why we use the term equinox as in latin “equinox” means “equal night”.
Not only does the daylight match the nighttime, but during the spring equinox the sun rises exactly in the east and sets exactly in the west. This is because during the equinoxes, the Earth is exactly parallel to the sun, meaning that neither axis is more towards the sun than the other, tilting the Earth, but rather are perfectly on end.
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