Crossword clues for equinoxes equinoxes There are two every year They occur in March and September Spring and fall events Season openers? Nothing wrong with horsey types coming round day and night just the same then? Biannual seasonal events Wiktionary equinoxes n. 1 (plural of equinox English) 2 (plural of equinoxe English) Usage examples of "equinoxes". Since then, due to the precession of the equinoxes, the signs have changed.