equinox
( plural )
( plural rare )
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One of the two occasions in the year when the length of the day and night are equal, which occurs when the apparent path of the Sun (the ecliptic) intersects with the equatorial plane of the Earth; this happens on a day between March 19 and 21 (spring in the Northern Hemisphere, and autumn in the Southern Hemisphere), and on another day between September 21 and 24 (autumn in the Northern Hemisphere, and spring in the Southern Hemisphere); hence, the exact time when the intersection occurs.
equinox
Many cultures hold festivals to celebrate the equinox, the moment when the Sun's apparent path crosses the Earth's equatorial plane and day and night are of equal length.
Many cultures hold festivals to celebrate the equinox, the moment when the Sun's apparent path crosses the Earth's equatorial plane and day and night are of equal length.
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