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# Topic: Calculating local time

###### In the News (Sun 26 May 19)

 Time zone - Wikipedia, the free encyclopedia Time zones are areas of the Earth that have adopted the same standard time, usually referred to as the local time. Due to daylight saving time, UTC is local time at Greenwich, England only between 01:00 UTC on the last Sunday in October and 01:00 UTC on the last Sunday in March. Time zones were first proposed for the entire world by Canada's Sir Sandford Fleming in 1876 as an appendage to the single 24-hour clock he proposed for the entire world (located at the center of the Earth and not linked to any surface meridian!). en.wikipedia.org /wiki/Local_time   (2612 words)

 Calculating local time - Wikipedia, the free encyclopedia So, while someone in England is having breakfast and watching the sunrise, someone in India is having their midday meal, someone in New Zealand in the South Pacific is watching the sunset, and it is the middle of the night in the Americas. The local time for a location can be calculated using the time zone for the location. The reference time for time zones was originally called Greenwich Mean Time (GMT), but is now referred to as Coordinated Universal Time (UTC). en.wikipedia.org /wiki/Calculating_local_time   (852 words)

 Fuso horari - Wikipedia For the remainder of the year, as in the rest of Europe, local time is UTC+1 (known in the UK as British Summer Time). Time zones with a deviation from UTC of a non-integer quantity of hours use the letter of the nearest whole hour-deviated time zone toward UTC, with a star or dagger added on. Time zones were invented by Sanford Fleming because of the need of railroad companies to have consistent local times between railroad stations. ia.wikipedia.org /wiki/Fuso_horari   (1131 words)

 SunAngle Time Basis "Local solar time" (or simply "solar time") is the time according to the position of the sun in the sky relative to one specific location on the ground. In solar time, the sun is always due south (or north in the southern hemisphere) at exactly noon. The "4" in the equation is the quotient of 60 minutes of time and the 15 degrees of longitude that the earth rotates in that time (i.e., the earth rotates one degree every four minutes). www.grupo.com /awning14m.htm   (366 words)

 Learn more about Time zone in the online encyclopedia.   (Site not responding. Last check: 2007-11-03) Time zones are areas of the Earth that follow the same definition of time. Time zones partially rectified the problem by setting the clocks of a region to the same mean solar time. Time zones are generally centered on meridians of a longitude that is a multiple of 15º however as the map below shows, the shapes of time zones can be quite irregular because of boundaries of countries. www.onlineencyclopedia.org /t/ti/time_zone.html   (1063 words)

 U.S. Time Zones   (Site not responding. Last check: 2007-11-03) Standard time within each time zone is an integral number of hours offset from a time scale called Universal Time, Coordinated (abbreviated UTC), maintained by a large number of very precise "atomic clocks" at laboratories around the world, including the U.S. Naval Observatory. History of Standard Time in the U.S. Standard time in time zones was instituted in the U.S. and Canada by the railroads on 18 November 1883. Before then, time of day was a local matter, and most cities and towns used some form of local solar time, maintained by some well-known clock (for example, on a church steeple or in a jeweler's window). aa.usno.navy.mil /faq/docs/us_tzones.html   (665 words)

 [No title] Time values expressed in local time are always interpreted in the receiver's local time. Local time is often referenced by the customary name for the time zone in which it is located. The relationship between local time and UTC is based on the offset(s) that are in use for a particular time zone. ietfreport.isoc.org /all-ids/draft-ietf-calsch-mod-01.txt   (4309 words)

 Religion & Ethics NewsWeekly . Multifaith Calendar . Moon Phases | PBS Other cycles of time are also important: the new or full moon, a season, a weekly day (for example, the Jewish Shabbat or the Friday prayers in a mosque), or a daily cycle (such as the Eucharist for traditional Christian communities). Festivals that depend on the timing of new or full moons, or on solstices and equinoxes, may fall on an adjacent day from that given in The Multifaith Calendar, depending on the time zone. When daylight saving time is in effect, adjust the calculated local time according to local practice. www.pbs.org /wnet/religionandethics/calendar/moon.html   (572 words)

 PostgreSQL: Documentation: Manuals: PostgreSQL 8.0: Date/Time Types Time zones around the world became somewhat standardized during the 1900's, but continue to be prone to arbitrary changes, particularly with respect to daylight-savings rules. The default time zone is specified as a constant numeric offset from UTC. They are converted to local time in the zone specified by the timezone configuration parameter before being displayed to the client. www.postgresql.org /docs/8.0/static/datatype-datetime.html   (1541 words)

 Time zone - Psychology Central   (Site not responding. Last check: 2007-11-03) Forcing all localities to run their clocks in synchrony would solve this problem, but under such a scheme, in many places the time shown by clocks at sunrise and sunset would differ too markedly from the solar time values to which people are accustomed. Originally, time zones were aligned such that the Prime Meridian (longitude 0°) was the center of its own time zone, with the mean solar time there (Greenwich Mean Time or GMT) defining its local time. The first time zone in the world was established by British railways on December 1, 1847 – Greenwich Mean Time being hand-carried on chronometers. www.psychcentral.com /psypsych/Time_zone   (2747 words)

 Space Today Online -- Solar System Planet Earth -- Angkor Coordinated Universal Time (UTC) is the time at Earth's zero or reference meridian, which is located on the globe at Greenwich, England. The zones referenced mean solar time to the 24 standard meridians, based 15 degrees east and west of Greenwich, the point from which reckoning for each day should begin. Before that, cities relied on their own local "Sun time." Of course, there were a lot of problems associated with tracking hundreds of local times and publishing timetables. www.spacetoday.org /Time/UTC.html   (1293 words)

 Time Scales Although the term GMT was not explicitly used, the standard time for legal purposes in the United States specified by 15USC261 (the Calder Act) was defined to be based on the mean astronomical time of meridians spaced at 15-degree intervals west of Greenwich; i.e., GMT. Although the term GMT was not explicitly used, the standard time for legal purposes in the United States specified by 15USC261 was clarified and reaffirmed to be based on the mean solar time of meridians spaced at 15-degree intervals west of Greenwich; i.e., GMT. This time scale is an effort to ascertain corrections to the values of TAI based on retrospective studies of the behavior of the clocks which have contributed to TAI. www.ucolick.org /~sla/leapsecs/timescales.html   (12419 words)

 [No title] If the calling time is exactly on the hour (0 minutes), only the hour need be entered, but if the time is some minutes after the hour, both the hour and minutes must be entered and separated by a colon (hh:mm). To change the time service or the time when a call is to be triggered by AutoDial, you first have to remove it from DOS memory by typing AutoDial /u at the DOS prompt then reload it with the new time service and the new time. In most places in the world where daylight (summer) time is used, an even hour is added to the local time during the spring and summer months (in a few regions the advance in local time during those months is 1.5 hours). www.rightime.com /pub/TIMESET.TXT   (6337 words)

 Religion & Ethics NewsWeekly . Multifaith Calendar . About the Multifaith Calendar | PBS Behind all schemes for quantifying that mysterious notion called ‘time’ are the major two lights in the sky: the sun and the moon. Solar calendars measure time according to the sun, lunar calendars according to the moon, while luni-solar calendars measure time using a combination of the sun and the moon. As an example, let us calculate the local time on the west coast of North America for the new moon on February 20, 2006. www.pbs.org /wnet/religionandethics/calendar/about.html   (1036 words)

 Dynamics of precipitating convection and downdraft forcing   (Site not responding. Last check: 2007-11-03) Traditionally the correlation between the vertical pressure gradient and the vertical velocity is calculated as a residual, but in this study it was calculated from a least-squares solution to the horizontal equations of motion. The temporal resolution issue also arises in applying the retrieval technique as the local time derivatives in the momentum equations (13.19) begin to approach the advective terms in magnitude. Hence, careful treatment of the local time derivatives, such as calculating the local time derivative only after placing successive radar volumes in a frame of reference selected to minimize the local time changes, is necessary. www.asp.ucar.edu /colloquium/1992/notes/part1/node132.html   (1067 words)

 Xeric Design, Ltd. | Product Information | Time Palette Time Palette displays the current local time for any city, renders real-time, photorealistic maps of the world with correct sun and moon shading, and calculates a wealth of global time, geographic, astronomical and weather data. Time Palette includes an Atlas with detailed geographical and time zone information for over 10,000 cities throughout the world. The concept was to see both the local time and the time at home. www.xericdesign.com /timepalette.php   (570 words)

 prhtml The collection of the former Time Museum of Rockford, Il., is the most complete in the world to show the history of humankind's efforts to measure time's passage. Then, by using the sun or stars overhead to calculate the local time of the ship, the degree of longitude could be determined easily. The standard time throughout the world, Coordinated Universal Time, is still based upon the Greenwich Meridian, and is obtained by averaging the time from about 250 atomic clocks stationed throughout the world. www.timemuseum.com /ttmop/prhtml.htm   (2981 words)

 EXPLORING MATHEMATICS USING THE CLOCK The theme for this unit is to use the clock to explore mathematical concepts.  Time concepts will be used in a meaningful way to reveal to students the relevance of accurate time measurement to their lives and the application of various mathematical concepts. For homework, have students write down all of the times shown in their own home, or even the car, and write a one-page explanation for the difference and reflect on what it means. Lesson Connections: By calculating the mean, median, and mode of different times, students learn to use time in non-traditional ways; in other words, they gain experience using time values as raw data aside from their original purpose as mere measurement. www.ecsu.ctstateu.edu /personal/faculty/koiralah/TimeUnit.htm   (4718 words)

 The Western Wisdom Teachings The rule for obtaining True Local Time is: to the nearest Standard Meridian Time, add four minutes for each degree the birth place is east of the Meridian corresponding to that Time. Moreover, as the speed of the Earth is variable at different times of the year, so also the difference in time between the sidereal clock and the solar clock varies. This is done by adding to the True Local Time of birth, four minutes for every degree of longitude, if the birthplace is west of Greenwich, or subtracting four minutes for each degree of longitude if the birthplace is east of Greenwich. members.fortunecity.com /rosanista/library02/jaceng03.htm   (2129 words)

 Minnesota Army National Guard - Army Values & Soldier's Code   (Site not responding. Last check: 2007-11-03) Another benefit of using military time is that time is always referred to in hundreds of hours. Our natural concept of time is linked to the rotation of the earth and we define the length of the day as the 24 hours it takes the earth to spin once on its axis. If you're elswhere in the world and "Lima Time" (Local time) is used, and a mission is directed from the Pentagon in Washington, DC, calculating to local time is just one more variable which posesses a possibility of error. www.starpoint.net /~etracsvc/151fa/time.htm   (763 words)

 www.timeanddate.com - Time Use the Time Zone Converter to calculate your local time, based on a date and time in another location. Past or present, this service will show corresponding local times around the world for the time selected. These are lists of when DST (Daylight Saving Time) started and stopped in countries around the world in past years, and the dates for 2006 as well. www.timeanddate.com /time   (367 words)

 The Mac Observer - Time Pallette Fixes Daylight Savings Bug, Adds Other New Features Time Palette, the utility that provides current time anywhere in the World with a click, has been updated to version 4.0.2. Time Palette, the premiere international time tool for Macintosh, is about time on a global scale. However, Time Palette goes far beyond a simple clock by supporting alarms in any time zone, GPS integration, astronomical data such as the times of sunrise, sunset and twilight for any location, navigational calculations, and distance and direction between cities. www.macobserver.com /news/00/april/000403/timepallet402.shtml   (770 words)

 Great Circle Distance Calculator and Swell Arrival Time Calculator Use this tool to calculate the Great Circle distance between any two points on the planet (in nautical miles) or to determine how long it will take a swell to travel to your beach. The time the storm is first forecast (or actually started) to produce seas aimed at your location (Assumes "local time" unless you set your PC to GMT/UTC). Arrival time are calculated for each 12 hour interval, so results require some interpretation skill. www.stormsurf.com /page2/papers/Java/Swivel.shtml   (266 words)

 Calculating local time So, while someone in England is having breakfast and watching the sun rinse, someone in India is having their midday meal, someone in New Zealand in the South Pacific is watching the sun set, and it is the middle of the night in the Americas. If they try to make this call at 8:30am on Thursday, the time in Sydney would be 2:30am Friday. They would be better to wait until 3pm to make the call, when the time in Sydney would be 9am Friday. www.gamesinathens.com /olympics/c/ca/calculating_local_time.shtml   (811 words)

 Local Apparent Sideral Time   (Site not responding. Last check: 2007-11-03) Sidereal time is the hour angle of the vernal equinox, the ascending node of the ecliptic on the celestial equator. The daily motion of this point provides a measure of the rotation of the Earth with respect to the stars, rather than the Sun. Astronomers use local sidereal time because it corresponds to the coordinate right ascension of a celestial body that is presently on the local meridian. tycho.usno.navy.mil /sidereal.html   (79 words)

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