the equinox is when the northern hemisphere and the southern hemisphere get equal amounts of day and night.
equinoxes and solstices were very crucial for ancient man, who lived a cyclical life, to understand that the weather will change again, that winter will come again, and that, afetr winter, that spring and summer will come again.
I have been reading a book on the history of astronomy and cosmology throughout human history. cool stuff.
at the equinoxes, the Maya would sacrifice humpbacks to their sun god. HUMPBACKS! no lie!