“The word is derived from the Latin aequinoctium, from aequus (equal) and nox (genitive noctis) (night). On the day of an equinox, daytime and nighttime are of approximately equal duration all over the planet.“
Source – Wikipedia
This kinetic sculpture represents the eternal fight of power between daytime and nighttime. Both represented with the Sun symbol and the Moon symbol trying to chase each other for the sky realm and lead the next season.