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Daylight is greatly dependent on the sun. The number of daylight hours a city or country receives is dependent on its latitude.
During the summer, the sun is striking the Northern Hemisphere straight on, therefore providing strong sunlight and longer daylight hours. The opposite is true during the winter; the Northern Hemisphere is turned away from the sun during this time, hence receiving weak sunlight and shorter daylight hours.
When night and day are approximately of equal length occurs twice per year. In the northern hemisphere these days are called the Vernal Equinox (20-21 March) and the Autumnal Equinox (22-23 September). However, as these seasons are reversed in the southern hemisphere, current usage is the March Equinox and the September Equinox.
12 hours
3 months of complete darkness.
It is called an equinox.
The Sun reaches an EQUINOX when it is directly above Earth's equator and the number of daylight hours equals the number of nighttime hours all over the world. At this time, neither the northern or the southern hemisphere is tilted toward the Sun.
12
Day and night are only equal on the winter and summer equinox.
The equinox is the point in time where the Sun crosses the equator and there is no tilt to the Earth, thus there are approximately the same number of hours of light and darkness in both hemispheres. The term "equinox" comes from the Latin aequus (equal) and nox (night).
It depends on where you are Not Really, If you live on the Equator, Every 24 hour period has 12 hours of daylight, and twelve hours of darkness. For every one else, there are only two 24 hour periods during the year When daylight hours equal night hours. These two days are the Vernal and Autumnal Equinox. (Equinox means equal). If you account for the differences in the number of daylight and dark hours in a 24 hour period, over an entire year, the average is 4380 hours each for daylight and darkness.
During the summer months, the Earth's northern hemisphere is tilted towards the sun. As a result, areas north of the Arctic Circle (i.e. north of 66.5622° latitude) will experience what is called a midnight sun during the Summer Solstice - a phenomena where the sun does not fully set (i.e. there is 24 hours of sunlight on this day).The exact number of hours of sunlight that occur on other days during the summer will depend on where you the specific location within the Arctic circle and which day you are referring to. Between the Spring (or Vernal) Equinox and the Fall Equinox - days where all locations on Earth experience an equal number of sunlight and nighttime hours - the number of hours of sunlight will vary between 12 (at the equinox) and 24 (at the Summer solstice).
March 20 and September 23 are the two equinox days when there are 12 hours of daylight and 12 hours of darkness at any place on the Earth.
In the Spring and Fall equinox, night and day have the same number of hours. Equi = equal.
Iceland winters are from September to April. In winter, November, December and January are the darkest months, but the sun does still shine. When there is snow on the ground, there can be four to five hours of daylight.
Daylight is greatly dependent on the sun. The number of daylight hours a city or country receives is dependent on its latitude.
equinox