The summer solstice (North) and the winter solstice (South).
equator
An observer at latitude 79°, whether north or south, can never see the sun at his zenith. That's only possible for observers whose latitude is less than 23.5°, either north or south.
It shines directly overhead at noon on June 21-22, usually 1 or 2 days.
South of the Equator the longest daylight is 24 hours at the South Pole. This occurs on the 21st/22nd December. In the Southern Hemisphere the seasons and the daylight hours are opposite to the Northern Hemisphere.
Each of the two days of the year when the noon sun is overhead at either 23.5 north and south is caled the SOLSTICE
The Sun is never directly overhead in the Continental US. The Sun's maximum inclination is 23.26 degrees, at the Summer Solstice, but Key West, the southern most point of the Continental US, is 24.5 degrees. It is close, but it is not directly overhead.
An observer at latitude 79°, whether north or south, can never see the sun at his zenith. That's only possible for observers whose latitude is less than 23.5°, either north or south.
The solstices.
solstice june 21 and december 21
The specifics change depending on the latitude in question, but the noontime shadow will become shorter as the sun's direct rays of incidence approach the latitude in question and longer as the sun's direct rays of incidence recede from that latitude. For example, if you live at 45 degrees North, your shortest shadow will be on the summer solstice, since the sun's direct rays of incidence are at 23.5 degrees North on that day and will be south of that position on all other days. Conversely, if you live at the equator, your shortest shadows will be on the vernal and autumnal equinoxes, since the sun is directly overhead on those days.
There are only two days of the year is when the sun directly overhead Singapore. This is as a result of being almost at the same latitude as the equator.
I think that it in the North and South, that the days and nights in Winter are cold and long. Because I think this, is because the North and South are far away from the equator. Hope that helped. :)
It depends where on Earth you are.-- Between the equator and 66.5° south latitude . . . June 22-- Between the equator and 66.5° north latitude . . . December 23-- Between 66.5° south latitude and the south pole . . .The sun doesn't rise at all from sometime before June 22 until the same length of timeafter June 22.-- Between 66.5° north latitude and the north pole . . .The sun doesn't rise at all from sometime before December 23 until the same length of timeafter December 23.-- At the south pole . . .The sun doesn't rise at all from March 21 until September 22.-- At the north pole . . .The sun doesn't rise at all from September 22 until March 21.-- On the equator . . .There are two shortest days every year: March 21 and September 22.
Never. The Sun can only be directly overhead (90 deg altitude) at latitudes between 23.5 deg N and 23.5 deg S. The Sun is directly overhead at a latitude of 23.5 deg N on the summer solstice. On that day it would be at its highest point in the sky for an observer at 27.947 deg N (about 85.553 deg above S horizon), but it would not be directly overhead.
1975, 55 days after the North started their invasion of the South.
It shines directly overhead at noon on June 21-22, usually 1 or 2 days.
North pole &south pole
South of the Equator the longest daylight is 24 hours at the South Pole. This occurs on the 21st/22nd December. In the Southern Hemisphere the seasons and the daylight hours are opposite to the Northern Hemisphere.