Equinox

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EQUINOX. The name given to two periods of the year when the days and nights are equal; that is, when the space of time between the rising and setting of the sun is one half of a natural day. Dig. 43, 13, 1, 8. Vide Day.

References in periodicals archive ?
It is also referred to as the autumnal or fall equinox in the northern hemisphere, as well as the spring or vernal equinox in the southern hemisphere.
Ramadan has come at a time of the Fall Equinox in Canada where the daylight hours stretch out in some places, to 15 exhausting hours.
In short, depending on where you live, some believe the second full moon after the fall equinox, which occurs on different dates from year to year, determines the timing of the rut.