equinox
🇺🇸
/ˈekwɪnɑːks/
🇬🇧
/ˈekwɪnɒks/
A day that occurs twice a year when the sun is directly above the equator, making day and night the same length.
On the equinox, day and night are of equal length, which is why people celebrate the balance of light and darkness.