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en.wikipedia.org/wiki/Equinox

An equinox is commonly regarded as the moment in which the plane of Earth's equator passes ... On the day of an equinox, daylight and night time are of approximately equal duration all over the planet. .... reference meridian 15° to the east, the Sun will rise around 07:00 on the equinox and set 12 hours later around 19:00.

www.timeanddate.com/astronomy/equinox-not-equal.html

"Equinox" literally means "equal night", giving the impression that the night and day on the equinox are exactly the same length; 12 hours each. But this isn't ...

www.timeanddate.com/calendar/september-equinox.html

On the equinox, night and day are nearly exactly the same length – 12 hoursall over the world. This is the reason it's called an "equinox," derived from Latin, ...

earthsky.org/astronomy-essentials/why-arent-day-and-night-equal-on-the-day-of-the-equinox

Sep 18, 2017 ... On the day of an equinox, the center of the sun would set about 12 hours after ... than 12 hours of daylight on this day of supposedly equal day and night. ... the sunset, adding several minutes of daylight at each end of the day.

www.artscalendararticles.mysite.com

After the long nights of darkness in the winter, it is when the sun and moon divide ... so there are again 12 hours of daylight and darkness in the day for Jerusalem, ... distance all around the earth between the north and south poles, and divides ...

aa.usno.navy.mil/faq/docs/equinoxes.php

Jun 14, 2011 ... The dates on which day and night are each 12 hours occur a few days before and after the equinoxes. The specific dates of this occurrence are ...

curious.astro.cornell.edu/about-us/161-our-solar-system/the-earth/day-night-cycle/195-is-the-sun-always-up-for-exactly-12-hours-at-the-equator-beginner

Jun 27, 2015 ... What is the length of day at the equator? ... It is always exactly 12 hours. ... In the Northern Hemisphere, the length of the day is longer during the months ... Why doesn't the length of each day change much around the solstices? ... is it possible for us to look into space and see light from Earth from long ago?

curious.astro.cornell.edu/physics/161-our-solar-system/the-earth/day-night-cycle/761-why-is-a-day-divided-into-24-hours-intermediate

During summer nights, 12 decan stars rose - one for each "hour". However ... Ordinary people continued to use the seasonally varying hours for a long time.

www.wwu.edu/skywise/a101_seasons.html

North of the equator, the summer day is longer than the summer night, all the more so as you go farther north. When we ... Every place on Earth experiences a 12-hour day and 12-hour night. ... It takes time for the long days to have an effect.