The Sun is at the top of the earth at 12:00 every day, so does it change at Daylight savings to 11:00?
543147
If anything it changes to 1:00, since the number of daylight hours before noon is less than the number of daylight hours after noon.  It is never actually at the top of the earth; it's just at its highest point in the sky.
454613
I know how you are feeling. Here in Indiana, it's the first time in many years that we used Daylight Savings Time. Until yesterday, parts of Indiana and Arizona were exempt from using DST. Since our govenor signed a new law, we are now on track with everyone else. I had to set all of our watches and clockes ahead 1 hour for the first time.
293133
It's called "Daylight Saving Time". It is believed to save electricity by prolonging the day with one hour.
1218
nothing to do with daylight savings. Daylight savings is a human invention, not a natural phenomenon.\n\n...because leap seconds are not being added to compensate for the Earth's rotation slowing down.\n\nThe amount of time it takes for the earth to revolve around the sun is 365.2425 days.\n\nEven that is an approximation, the decimal digits can keep going on.\n\nSo initially, the calendar was divided evenly in 365 days. But about every 4 years, you'd be off 1 day. A century later, you've drifted off by a whole month!\n\nSo, leap years came into effect. Febuary has another day every 4 years. \n\nBut now you've approximated a year to 365.25 days, when in reality, its 365.2425 days.\n\nEvery century, you'll be off 1 day.\n\nSo that's where the next rule comes into play: "If the year is divisible by 4, but not by 100, its a leap year."\n\nNow we've approximated it to 365.2425, but because its always going to be an approximation, our calendar days are always slipping. All because the earth doesn't take exactly 365 days to go around the sun.\n\nThis is why leap seconds are added, and not to account for the slowdown of the earth's rotation.\n\nAs to why days are divided in exactly 24 hours, I'm not sure. But I would think the time difference is WAY less than 20 minutes, or we'd notice that soon enough, its dark at noon! :)  Time was divided a long time ago, and a simple system was sought for keeping track of it, so the minuts/hour/year thing is a nice division thats easy to do math with. The lost time, if its accounted for by leap years and such, could be easier to manage.\n\nFirst, I never said the earth is not slowing down. I said its not why leap seconds exist. And ok, I can entertain my explanation may be wrong, but that's no reason for your condescending tone, Jolly Roger. But look, your link brings me to a christian science evanglism site, where is the evidence that my answer is incorrect? \n\nYou haven't bothered to explain his original question. If leapseconds account for the slowdown of the earth's rotation, why are there leap seconds and not leap milliseconds?\n\nIf you want to append to your answer, at least try to do so while respecting the other users on this site, and not insult their intelligence.\n\nThis has piqued my curiosity, if there's anyone out there that has a source that says my explanation is incorrect, I mean an actual science website, you know, one that steers clear of religion, please let me know.
497349
Daylight saving time (DST), also known as summer time and sometimes referred to (some think erroneously - see later) as daylight savings time, is a widely used system of adjusting the official local time forward, usually by one hour, from its official standard time for the summer months. This is intended to provide a better match between the hours of daylight and the active hours of work and school. The "saved" daylight is spent on evening activities which get more daylight, rather than being "wasted" while people sleep past dawn.\n\nDST is most commonly used in temperate regions, due to the considerable variation in the amount of daylight versus darkness across the seasons in those regions.\n\nGovernments often tout it as an energy conservation measure, on the grounds that it allows more effective use of natural sunlight resource in summer time. Since there is less darkness in the "waking day", there is less use of electric lights. Some opponents reject this argument (see below, Criticism).\n\nEuropeans commonly refer to the system as summer time: Irish Summer Time, British Summer Time, and European Summer Time. This is reflected in the time zones names as well, e.g., Central European Time (CET) becomes Central European Summer Time (CEST).\n\nThe word "summer" in this context includes most of spring after the spring equinox and nearly all of autumn (April through October). Likewise, the word "winter" here includes part of autumn and a few weeks in spring (November through March). This varies by time zone, of course, and can change over time as well.
1178290
Pacific Daylight Time.
1037320
It depends on exactly where you live and what time of year it is, but right now the sun rises at about 5:45 where I live.
281596
Yes it would be the same.\n\nDaylight saving time is used between summer and winter and not where they exist.\n\nSince the durations of day are very different in Summer and winter, it is better to have long working days in summer.\n\nThis is the reason why some countries don't follow it. Those at equator (similar suntimes in winter and summer) don;t follow and those away from equator(different suntimes in winter and summer) follow daylight saving time.
1094734
Daylight savings time is a widely used system of adjusting the official local time forward, usually by one hour, from its official standard time for the summer months. This is intended to provide a better match between the hours of daylight and the active hours of work and school. The "saved" daylight is spent on evening activities which get more daylight, rather than being "wasted" while people sleep past dawn.\n\nEuropeans commonly refer to the system as summer time: Irish Summer Time, British Summer Time, and European Summer Time. This is reflected in the time zones names as well, e.g., Central European Time (CET) becomes Central European Summer Time (CEST).\n\nIt is sometimes asserted that DST was first proposed by Benjamin Franklin in a letter to the editors of the Journal of Paris. However, the article was humorous; Franklin was not proposing DST, but rather that people should get up and go to bed earlier.\n\nIt was first seriously proposed by William Willett in the "Waste of Daylight", published in 1907, but he was unable to get the British government to adopt it, despite considerable lobbying.\n\nThe idea of DST was first put into practice by the German government during the First World War, between April 30 and October 1, 1916. Shortly afterward, the United Kingdom followed suit, first adopting it between May 21 and October 1, 1916. On March 19, 1918, the U.S. Congress established several time zones (which had been in use by railroads and most cities since 1883) and made DST official, effective March 31, for the remainder of World War I. It was observed for seven months in 1918 and 1919. The law, however, proved so unpopular (mostly because people rose and went to bed earlier than in current times) that it was later repealed.\n\nDST is generally a temperate zone practice; day lengths in the tropics do not vary enough to justify DST. Hawaii and Arizona are the only U.S. states that do not observe DST.\n\nThe amount of the time shift varies, but one hour is the most common. The dates of the beginning and ending of DST also vary by country. With a few exceptions, switchovers between standard time and DST generally occur in the early hours of a Sunday morning, because doing so then causes less disruption than a change on a weekday would.\n\nDST commonly begins in the northern hemisphere on the last Sunday in March or the first Sunday in April, and ends on the last Sunday in October. However, beginning in 2007, the United States will begin observing DST from the second Sunday in March until the first Sunday in November. If no energy savings can be shown from the extension after the U.S. Department of Energy completes a study of impact of the change, Congress may revert back to the schedule set in 1986 under Section 110 of the Energy Policy Act of 2005. Since 2002, the European Union has fixed the last Sunday in March and the last Sunday in October as start and end dates (European Summer Time).\n\nIn the southern hemisphere, the beginning and ending dates are switched; therefore, the time difference between the United Kingdom and Chile may be 4, 5 or 6 hours, depending on the time of year.\n\nThe U.S. federal Uniform Time Act of 1966 mandated that DST begin nationwide on the last Sunday in April and end on the last Sunday in October, effective in 1967. Any state that wanted to be exempt from DST could do so by passing a state law, provided that it exempted the entire state. The law was amended in 1972 to permit states that straddle a time zone boundary to exempt the entire area of the state lying in one time zone. On July 8, 1986, President Ronald Reagan signed the Federal Fire Prevention and Control Act of 1986 into law, which amended the starting date of DST to the first Sunday in April, to take effect the following year.\n\nIn response to the 1973 energy crisis, DST in the United States began earlier in both 1974 and 1975, commencing on the first Sunday in January (January 6) in the former y
952850
Absolutely! It is ridiculous that it is fully dark at 4PM in the winter where I live, yet it doesn't get dark until 10 PM in the summer.  We could at least do away with some of the gap by eliminating the artificial difference by going on daylight saving time permanently.
1163098
Greenwich Mean Time does not change in the summer, but the London time does. IE, in summer, in London, the local time is GMT + 1.\n\nBTW, you seem to have your locations confused. India is ahead of London, not behind.
187903
The sun doesn't have to move in order for the planets to have a sunset or sunrise.  Always remember that the earth constantly rotates and takes 24 hours to make a full rotation. On one side of the earth there will be light versus the other side will be darkness.
328347
The earth's orbit is not circular so at some times of the year the earth is travelling more quickly. So sunrise and sunset times vary at the equator. In fact the earliest sunset is at the middle of November and the latest sunrise is at the begining of February. In temperate regions this effect is overwhelmed by the effects due to the tilt of the earths axis.
108762
There is a common misconception that winter happens when earth is farthest from the sun.  Actually, earth's orbit is only slightly elliptical.  Temperatures vary because of the inclination of the earth.\n\nThe hours of daylight and darkness are not related to earth's orbit.  The hours change because the earth rotates about the north pole - south pole axis and this axis is tilted relative to the sun.  Check the link in sources for all the details!
948901
OK, for starters, the earth revolves around the sun, the sun does not revolve around the earth, contrary to the first poster's assertion.  In any case, the revolution of the earth around the sun has nothing to do with the length of the day.  \n\nThe length of the day is always the same, year-round, approximately 24 hours.  I think what you mean to ask is "why does the time from sunrise to sunset become shorter in winter?"\n\nThe reason is that the tilt of the earth's polar axis changes from where it is at the height of summer June 22, when it is close to perpendicular to the line from the earth to the sun, to the depth of winter December 22 when it is about 22 degrees away from the direction it tilts at the height of summer.  Because of the tilt of the earth's polar axis, the sun rises later in the morning and and sets earlier in the evening, resulting in a shorter period of sunlight each day.
1146317
One question at a time.\n\nThe first one has been answered. Becasue of the earths tilt, countries in the southern hemisphere are closer to the sun in December than the countries in the northern hemisphere - that is why we have winer here (its further away). And when the earth goes around to the other side of its orbit around the sun in July, we in the northern hemisphere are closer, while they are farther. \n\nThis the general rule, however there are many other factors like elevation, precipitation, wind patterns, jet streams, ocean currents etc etc. so yes - every country in the northern hemisphere it is officially summer in july etc. but not necessarily as warm as some other countries can get. and vice versa for the southern hemisphere of course.\n\nAll of us - when we stand up, we are perpendicular to the earths surface no matter where we are. Imagine a ball ... and pins sticking straight out of the ball. This is how we'd look, so to a person on the south POLE, would be upside down to someone on the north POLE. or someone in one area, will be upside to someone else DIRECTLY on the other side the earth's surface. Everyone else will be in varying degrees of "upsidedownness"\n\nDaylight savings time is a pure man made concept. But again ... because of the tilt of the earth, during July etc. the sun shines longer on the northern hemisphere (The days are longer) and the southern hemisphere the days are shorter. This causes the sun to rise earlier and earlier and then after the longest day of the year, it reverses - the days get shorter and shorter. \n\nNow what happens is that you can wake up at 6 am and it still be pitch dark and 7 am it starts to rise and 8 am its fully light. So they change the time to go an hour back (Fall Back) and this allows the time now to be 5 am as pitch dark, 6 am start rise, and 7 am fully light. So for people who wake up at 7 am everyday, the first plan it will be kinda  dark when they wake up but with daylight savings, it will be fully light when they wake up! Thus its just something certain countries do to be able to have light for when most people wake up in the morning - even if you are not a mornig person - about 90% of people wake up at that time to to go to work\n\nHope all this made sense and email me at alxsml@yahoo.com for more clarification.
260237
here you have the answer\nhttp://webexhibits.org/daylightsaving/c.html