Equinox

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Related to vernal equinox: autumnal equinox

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 ?
PAGASA said after the vernal equinox, the daylight hours would be longer.
242 days in the Gregorian calendar, the vernal equinox (http://www.
If I'm lucky, it will be finished by March 22, the vernal equinox,'' he said.
But the actual moment that the new year begins corresponds to the mathematical instant of the vernal equinox.
Spring: It's officially sprung, at least it will have by Wednesday, the vernal equinox Overworked celebrities: Both Justin Bieber and Kelly Osbourne have collapsed in recent weeks.
Late last night, you may have felt more discouraged about some of your ideas, but today, you can rediscover the spark, due in part to the background energies of the Vernal equinox that have marked the new astrological year, but also because Uranus is urging you on.
It is celebrated on the day of the astronomical vernal equinox, which usually occurs on March 21 or the previous/following day depending on where it is observed.
During the March equinox (also known as vernal equinox in reference to spring) and the September equinox (autumnal equinox) the length of nigh and day become equal.
In the years around 2000 BC, the Babylonian New Year began with the first New Moon (actually the first visible crescent) after the Vernal Equinox (first day of spring).
Both Orthodox Christians and the rest of the Christian world, including Catholics and Protestants, define the date in the same way as the first Sunday after the full moon following the first Vernal Equinox.