When night and day are approximately of equal length occurs twice per year.
In the northern hemisphere these days are called the Vernal Equinox (20-21 March) and the Autumnal Equinox (22-23 September).
However, as these seasons are reversed in the southern hemisphere, current usage is the March Equinox and the September Equinox.
No place on Earth always has equal day and night hours. At the equinoxes ("equal night"), Vernal and Autumnal, the beginnings of Spring and Autumn, the whole Earth has equal day and night hours.
true
The (vernal or autumnal) equinox.
The duration of The Night My Number Came Up is 1.57 hours.
The word "equinox" means equal night. So, by definition, the day and night must be of equal length: 12 hours.
equater
equinox
No place on Earth always has equal day and night hours. At the equinoxes ("equal night"), Vernal and Autumnal, the beginnings of Spring and Autumn, the whole Earth has equal day and night hours.
At the Equinoxes: 21 March and 21 September.
In the Spring and Fall equinox, night and day have the same number of hours. Equi = equal.
equinox
An Equinox.
Saturday
Is called an equinox
Day and night hours.
true
The (vernal or autumnal) equinox.