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 ?
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.
It takes place one week after the vernal equinox, when night and day are the same duration in both hemispheres, which ensures that it will be night-time for all people, wherever they are at 8.
AaThis year's Earth Hour on March 27Aa takes place one week after the vernal equinox - when night and day are the same duration in both hemispheres - which ensures that it will be nighttime for all people, wherever they are at 20:30 hours in the evening.
This festival was held around the Vernal Equinox around Asia Minor and eventually in Rome itself from the Ides of March, (which run 15th-18th).
Easter Sunday is always the Sunday after the first full moon after the vernal equinox, which is March 21.
Hundreds of thousands soaked up the sun as the fine weather held across most of the country following the Vernal Equinox on Friday - officially the first day of spring.
Because its timing depended on both the Moon's phases and the vernal equinox, ecclesiastical authorities had to seek some way of reconciling lunar and solar calendars.
The buzz of what Red Barber assured us was "a shirt-sleeved crowd" was as sure a portent of the vernal equinox as crocuses and robins were.
wrote to top military commanders at a base in Texas arguing that soldiers should not have been permitted to celebrate the vernal equinox.
Baha'is keep a fast annually from sunrise-to-sunset for 19 days prior to the vernal equinox when Baha'i New Year is celebrated.