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en.wikipedia.org/wiki/Daytime

On Earth, daytime is roughly the period on any given point of the planet's surface during which ... At the Equator, the daytime period is always almost twelve hours in length, ... In fact, within 23.5° latitude of the poles, there will be at least some days each year ... Morning; Daytime; Evening · Sunset–Twilight–Dusk · Night.

en.wikipedia.org/wiki/Equinox

An equinox is the moment in which the plane of Earth's equator passes through the center of the Sun's disk, which occurs twice each year, around 20 March and 23 September. On an equinox, day and night are of approximately equal duration all over .... These two effects combine to make the equinox day 12 h 7 min long and the ...

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

But although night and day are nearly 12 hours each on an equinox, they ... Even if day and night aren't exactly equal on the day of the equinox, there are days ...

www.artscalendararticles.mysite.com

DATES WHEN DAYS AND NIGHTS REACH 12 HOURS IN LENGTH AT ... After the long nights of darkness in the winter, it is when the sun and moon divide ... distance all around the earth between the north and south poles, and divides the  ...

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

6 days ago ... ... equinox, the center of the sun would set about 12 hours after rising - given a ... the sunset, adding several minutes of daylight at each end of the day. ... It has been polar dawn for well over a month now and in a few days the ...

www.nasa.gov/audience/forstudents/k-4/home/feature_autumn.html

Dec 9, 2007 ... In the north, the hottest days of summer are past. Each day is shorter than the last . ... On this date, day and night are each 12 hours long. This is ...

www.weather.gov/cle/seasons

The "nearly" equal hours of day and night is due to refraction of sunlight or a ... Therefore, on the equinox and for several days before and after the equinox, the ... to 12 hours and 8 minutes at 30 degrees latitude, to 12 hours and 16 minutes at 60 ... We all know that the Earth makes a complete revolution around the sun once ...

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 ...

www.wwu.edu/skywise/a101_seasons.html

At southern latitudes the roles are reversed, longer warmer days in the winter and ... North of the equator, the summer day is longer than the summer night, all the more so as ... sky each day and reaches a point when it is in the sky for exactly 12 hours (night for the other 12). ... It takes time for the long days to have an effect.