The September equinox marks a moment of balance — when day and night are equal (nearly) across the globe. Two factors explain why we have more than 12 hours of daylight on this day of supposedly equal day and night. So, no, day and night are not exactly equal at the equinox. The word is used to describe the day on which day and night are equal. Visit timeanddate.com for the approximate date of equal day and night at your latitudeBottom line: There’s slightly more day than night on the day of an equinox.