HOW do you find the hours of daylight for this chart?
958764
Ok so we now the location and the percentage of sunlight that it is receiving, like the north pole is getting 100% sunlight which equals 24 hours of the day where as the equator is only receiving 50% sunlight equaling 12 hours of the day.\n\nSince we know that it is a ratio, we can say NYC receives 60% sunlight during 24 hours.  To find the number of hours we would multiply 24 hours by 60%   (24 x 0.6 = 14.4)   to get 14.4 hours.\n\nTo convert hours to minutes multiply by 60.  Like 14.4 hours times 60 minutes per hour gives us 864 minutes.\n\nHope this helps.
466006
Pick a few easy points like pi/2, pi, 3pi/2, 2pi.  You know the period.  Then just graph it.
1140073
The earth rotates 1 on its axis every 24 hours.  Hipparchus proposed dividing the day equally into 24 hours which came to be known as equinoctial hours (because they are based on 12 hours of daylight and 12 hours of darkness on the days of the Equinoxes). Ordinary people continued to use seasonally varying hours for a long time. Only with the advent of mechanical clocks in Europe in the 14th Century, did the system we use today become common place
963687
There is no day of the year that has EXACTLY 12 hours of daylight and 12 hours of dark because no day is EXACTLY 24 hours long. A sidereal day is 23 hours, 56 minutes, 4.091 seconds long. On the equinoxes, we have approximately equal amounts of light and dark.
1076827
4:00\n\nEST = CST + 1 hour
1107632
There's Greenwich Mean Time, which was measured from the 0 degree meridian in Greenwich, UTC (Universal Time co-ordinate) which is measured from an atomic clock in france somewhere (UTC doesn't have summer time, GMT does) and there's standard time which works on the premise that 1 rotation of the earth is 24 hrs, so 360 degrees in 24 hrs = 15 degrees every hour, so every 15 degrees of longitude is 1 hr of time difference
343833
ET ~ East Coast Time(USA) \nEastern Standard Time (EST) = GMT-5. \nEastern Daylight Time (EDT) = GMT-4.\n(UK uses GMT in winter)
188774
http://www.worldtimezone.com/\n\nlook at the map and calculate it based on your time zone.
1185825
Funny, its the longest day here in Minnesota....you must be in the Southern Hemisphere\n\nIt sounds to me as if you are looking for something to tell you how much daylight there is each day.  Here is a cool little weather site that I go to check the weather (and daylight hours) in Negril, Jamaica. \n\nIt works for all major cities around the world.  Just type in your city, and country in the box in the upper left corner. It shows all these things: Actual Time, Civil Twilight, Nautical Twilight, Astronomical Twilight, Moon rise, Length Of Visible Light, and the length of Day.  It will even tell you how much the next day is different  like this: Tomorrow will be 0m 3s shorter. \n\n You can also change the date you are looking for and it will show you the astronomical data for that day. \n\n Try it....you'll like it!    Happy viewing!\n\nhttp://www.wunderground.com/global/stations/78387.html
220002
its done by counting how long it takes for light from the planet takes reach here. usually between a period of dark and light. same as the sun
433636
Try this:\nhttp://www.timeanddate.com/worldclock/
956732
you are right,lenght of day depends on : date (position of the earth on it's orbit); location on earth (latitude, elevation);  to calculate day/night lenght, longitude is needed only to find mean time of sunrise/set,noon...in calculs, time should be converted to UTM, dates to Julianian dates.\ni don't know formula to calculate length of day/night,but here's some usefull sites:\nhttp://www.gcstudio.com/suncalc.html\nhttp://susdesign.com/sunangle/\nhttp://aa.usno.navy.mil/faq/docs/equinoxes.html
1052185
Tuesday  \n        17 October 2000       Eastern Daylight Time          \n\n                         SUN\n        Begin civil twilight       6:32 a.m.                 \n        Sunrise                    7:01 a.m.                 \n        Sun transit               12:30 p.m.                 \n        Sunset                     5:58 p.m.                 \n        End civil twilight         6:27 p.m.                 \n\n                         MOON\n        Moonrise                   8:25 p.m. on preceding day\n        Moon transit               3:56 a.m.                 \n        Moonset                   11:35 a.m.                 \n        Moonrise                   9:12 p.m.                 \n        Moonset                   12:41 p.m. on following day\n\n\n\nHope this helps
1130548
Winter Solstice has the least daylight: Dec 21. March 21 and September 21 are the vernal and autumnal equinoxes (when day = night = 12 hours). June 21 = the day with most daylight (in Northern Hemisphere).
320123
Depends on the time of year.\nSummer solstice = 0\nWinter solstice = 24\nSpring/fall equinox = 12\n\nAll other days, some gradual change from 0 to 24. This is true of any land within the Arctic or Antarctic circles (of course the times are reversed for the Arctic circle). Those circles are defined by the places on Earth that have at least one day of complete light and complete darkness during the year.
260237
here you have the answer\nhttp://webexhibits.org/daylightsaving/c.html
21187
3:46 EST\n2:46 CST\n1:46 MST\n12:46 PST\n11:46 AKST\n10:46 HST