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The usual answer is at the March (vernal equinox) and September (autumnal equinox). However this is not really true. Do to effects like refraction, the sun seams to rise earlier and set later than simple geometry would dictate. Thus if you check any almanac, you will see that there are several minutes more of day than night on the equinox days. The actual day of equal day and night would be several days before the March equinox and after the September equinox. The exact day depending on your lattitude.
For more details see - http://aa.usno.navy.mil/faq/docs/equinoxes.php
The two days of the year that are of equal amounts of both day and night are the autumnal and vernal equinoxes. They usually fall around September and March 22. But they vary. As with the solstices in June and December, they signify the beginning of Spring and Autumn.
On the vernal and autumnal equinoxes, the hours of day and night are about equal in every place in the world. These dates are on approximately September 23rd and March 21st so during Spring and Fall. Since the Sun's direct rays hit the Earth's equator on these days, the length of hours that every place in the world receives as day and night are equal because the equator is at the center of Earth's longitude lines. I hope this answers your question.
Days and nights are only of equal duration twice per year. It occurs on the summer solstice and the winter solstice.
The summer solstice occurs around June 20, it can vary from year to year. It signals the start of summer.
The winter solstice occurs around December 20, and can also vary from year to year. It signals the start of winter.
There are two days in a year when day and night are approximately equal in duration - the spring equinox and the autumn equinox. These occur around March 20-21 and September 22-23 respectively.
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How many times a year do you have days in which the day and night are of equal duration?
Twice, at the Summer and Winter Solstaces.
How many times each year do you have days in which the day and night are of equal duration and what are the names of each of these days?
There are two days each year when the day and night are of equal duration, known as the equinoxes. The vernal (spring) equinox occurs around March 21st, marking the beginning of spring in the Northern Hemisphere, while the autumnal equinox occurs around September 22nd, marking the beginning of autumn.
How many days on earth are equal to one day on the moon?
One day on the moon is equal to approximately 29.5 Earth days. This is because it takes the moon about 29.5 days to complete one full rotation on its axis, which is the same amount of time it takes to complete one orbit around the Earth.
How many years is 2920 days equal to?
Divide the answer by 365 because it is number of days in a year. 2,920 / 365 = 8 Years.
After how many days 1-4 of the original amount of gold 198 will remain?
After 4 days, only 1/16 of the original amount of gold (198/16 = 12.375) will remain.
How many times each year do we have days in which the day and night are equal?
Two times
How many days of the year have an equal amount of day and night is it 1 2 3 4?
There are two days of equal length- they are called the equinoxes. And to the person below who asked a question by writing in the ANSWER space- shadows of the sun appear to move because the Earth is rotating (turning)
How many times each year do you have days in which the day and night are in equal duration?
3 Twice. On the Autumnal equinox and on the Vernal equinox.
How many days does 101.64 equal?
101.64 days, of course!
How many days equal 1209600 seconds?
840 days
How many days is equal to one semister?
90 days.
How many days equal 85 years?
31025 days
How many days does a year and a quarter equal?
456.25 days
How many days are equal to 22440546 Minutes?
15,583.7125 days
How many cups do equal?
put the same amount to put it equal
How many days after conception can you have a miscarriage?
Any amount of days.
How many years is 504 days?
365 days is equal to 1 years, so therefore 504 days is equal to 1 year and 139 days.
