Why  is the International Date Line not straight?
551721
In order to keep countries within the same date.
72477
I guess it is all on how you look at it, but I think it is a little further south.\n\nThe International Date Line:\nOn Jan 1, 1995 The Republic of Kiribati, formerly the Gilbert Islands, moved the International Date Line to include its entire territory to the western side of it and prevent the country from remaining in two different days. As a result, the line has a bulge further east than Honolulu.\nBecause of this eastern bulge in the International Date Line, Kiribati claimed that Caroline Island would be the first point of land to see in the new millennium.\nUnfortunately the Sun doesn't rise here before it does in the Antarctic, much further south.\nCaroline Island is actually an atoll of 22 small islets protected by a very shallow reef and is about as hard to get to as the Antatartic; you would probably need to go in by seaplane.\nFirst inhabited place to see the Jan 1st sunrise.
579343
International date line, located in the Pacific Ocean.  It's not a specific longitude, but drawn, I think, to miss any islands.\n\nThe International Date Line is the imaginary line on the Earth that separates two consecutive calendar days. That is the date in the Eastern hemisphere, to the left of the line, is always one day ahead of the date in the Western hemisphere. It has been recognized as a matter of convenience and has no force in international law.
692387
There is nothing special about that spot.\nThe equator is 0 latitude for fairly obvious reasons.\nZero longitude is measured from Greenwich England which is where the Royal Observatory is located. The two independently determined lines just happen to cross of the coast of Africa.
741077
might be quicker to go through your browser history.\nOn Internet Explorer the icon looks like a clock with an arrow going backwards.\nClick on this and find the date in question, your site should be there.\nATB
223500
>There are 24 longitudinal divisions of Earth's surface in which a standard time is kept, the primary division being that bisected by the Greenwich meridian. Each zone is 15° of longitude in width, with local variations, and observes a clock time one hour earlier than the zone immediately to the east.Under this scheme, local time is always close to mean solar time, while comparing the time in different places is a simple matter of adding or subtracting whole hours. However, the one hour separation is not universal and,the shapes of time zones can be quite irregular because they usually,but not always,follow the boundaries of states,countries or other administrative areas.Some states do have more than one time zone.
389842
Since no one can understand this jumbed question I wil just answer another one:\n\nQ: "What is the international date line and why is it where it is?"\n\nA: "Learn how to type you jack@ss."
15290
Not every latitude gets a minute every day. Some get more, some get less. But daylight starts increasing immediately, as the previous answer said.
54341
Not sure I understand the question. Do you mean the international date line?
939515
There is possibly something wrong with your GPS data.  The interpretation of the points may be your error source as it is hard to locate certain items with Google Earth.\nI first ran the Longitude points with a Geodetic Program that can run the Inverse of two geodetic points on an ellipsoid.  I used the WGS84 datum. I noticed that you did not include the latitude and the elevation of the point pair in question.  That is ok.  The program kicked back an Ellipsoidal distance of 1, 040.528 meters and a Mark-to-Mark distance of the same value, 1,040.528 meters.\nI then did a check on this value by using the Mean Radius of the Earth and converting the difference in the Longitude values to radians and ran it through my Geodesy equation and came up with a value of 1039.36 meters.  Pretty close to my program's value.\nYou can always do a check by pacing, pulling a tape, or using some survey techniques to get a fix on the distance.\nRemember, that GPS is referenced to a mathematical Ellipsoid and there are complex equations that determine fixed locations on Earth and the precision and accuracy of the points defined.\nGood night and good luck.
106160
it doesn't in all countries, it depends which side of the equator you are on
60554
They see the exact same side at a different angle.  Right now I'm in china and the angle is really weird to me for some reason, but it's still the same side.
629015
Its not that the times are different in different countries, it has to do with time zones. There are 16 (I think) different time zones around the world, so that no matter where you are in the world, the time will be about the same to where the sun is.\nTo learn more try the link
66192
It is due to the slight orbital eccentricity of Earth rotation around the Sun. Since the orbit is not perfectly circular the distance between the two bodies varies.
795720
************************************************************\n\nLongitute or 'meridians' are imaginary lines that run from the north pole to the south pole. Or maybe South to north...hmmm...I'm not sure which way....I suppose if you're in the north....but then.......Oh! Nevermind that. The point: These lines measure time and distance for east and west on the globe. Remember they run north and south. They resemble an orange with it's slices running up and down. Each line between the orange slices would be a longitude line. There is 24 primary longitude lines that are 60 minutes apart. They can be broken down into minutes, degrees, and seconds but thats probably more than you are needing to know about right now. The Prime meridian where the time begins, or where the zero/24 begin and end, is called zero point of longitude or universal prime meridian. Check out any globe of the earth and you will most likely find the Prime Meridian somewhere over Europe in Greenwich.\n\nLatitude goes the other way. They are parallel lines (lines that are equally distanced from one another at any point of the lines) that run east and west but measure distances north and south of the equator. They also run parallel with the equator. So, like the equator that runs all the way around the world without touching another latitude line, the others do as well. Each circle or ring, get smaller and smaller the further north or south you go.\n\nLines of latitude intersect with lines of longitude at points on the globe and are used to specifically  locate points on the globe. These are measured generally in degrees, but, as mentioned earlier, can be broken down even further. My city, for example, is 39 degrees north and 95 degrees west. I've included a website that you can check your own city's location and time among other information. Just enter your city name and press enter.\n\nI hope this is helpful. Good luck.\n\n*************************************************************
75399
The reason there is differing amounts of daylight is that the Earth's axis is tilted with respect to the plane of its rotation about the sun. When the north pole is tilted towards the sun, the northern hemisphere days get longer. The point in the Earth's orbit about the sun where the plane through the Earth's axis that is perpendicular to the Earth's plane of orbit ALSO passes through the sun itself (i.e. the Earth's rotation axis is lined up with the sun, north end closest) is the summer solstice. When the same plane passes through the sun again, only with the south pole closest, that is the winter solstice. At summer solstice, the length of the day is longest in the northern hemisphere. At winter solstice the day is shortest in the northern hemisphere. The opposite is true in the southern hemisphere. On the equator the lengths of the days don't change at all! The further you get from the equator, the more the length of the days change with the seasons.\n\nSo let's talk northern hemisphere. If the longest day is around June 21 (summer solstice) and the shortest day is Dec 21 winter solstice, you can think of the length of the days as changing smoothly from shortest to longest as you move from winter to summer solstice. If you do the geometry to figure out how the length of days changes with the seasons, it looks a lot like a sine wave. It's actually shaped a little differently because the Earth's orbit is not a circle--that would make a sine wave exactly for the length of days--but instead an ellipse. But it's still pretty close to a sine wave. If you look at a sine wave, you'll notice that as the wave approaches the bottom, slows down its descent until it almost "flattens" at the bottom, but not quite. Then after the bottom, it goes up more steeply until somewhere in the spring it is changing as fast as possible (pretty near to the vernal equinox), then begins to slow down again until it hits the peak at the summer solstice. After the summer solstice, the longest day, the length of days begins to fall, slowly at first and then ever faster, until somewhere in fall (pretty near the autumnal equinox) it's changing as fast as it's ever going to. Then it begins to slow down, until it hits the minimum at the winter solstice again. If you look back at the description about, you'll notice that the rate at which the length of days change also varies with the season. In fact, the rate of change is like a sine wave, too, only it's shifted by a season from the wave that describes the rising and falling of the length of the day itself.\n\n\nFor the latitudes farther away from the equator, the amplitude of the sine wave is larger. For the southern hemisphere it is flipped upside down compared to the same latitude in the northern hemisphere. And on the equator, the "sine" curve as zero amplitude--that is, it's a straight line.\n\nIn calculus you would say that the rate of change of a function (the "derivative" of the function with respect to time) tells you how fast the daylight is changing on a given day. And, in calculus you also learn that the rate of change of a sine wave is a cosine wave--or just another sine wave shifted back by 90 degrees. And 90 degrees of the sine wave describing the length of days corresponds to one season on Earth!
210276
March 14th at 23:35 Universal Standard Time.\n\nI'm including a link to the US Navy site, they seem to have pretty accurate info for such things :-)  Most webpages that try to auto-calculate it get it wrong, apparently the math is rather involved and it falls down to careful measurements.