Saturday
Equinox
equinox
The equinox is when, twice each year, day and night are of equal length (about 22 September and 20 March).
Aequabilis (adj) meaning Equal & Nox, Noctis (n, f) meaning Night.
A Hard Days Night Help! Yellow Submarine
Two times
The time from one sunrise to the next is about 117 Earth days. The length of day and night are roughly equal at about 58 Earth days each.
Anywhere around the equator, the days and nights are always about equal.
The spring and autumn equinoxes, when day is equal to night in both hemispheres.
The Autumn equinox and the Spring equinox .
These are the Vernal [or Spring ] and Winter Equinox . These days differ slightly and should be marked on your calendar.
Spring and fall equinox.