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Topic: United States time zones

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In the News (Tue 23 Jul 19)

  About Daylight Saving Time
Daylight Saving Time (or summertime as it is called in many countries) is a way of getting more light out of the day by advancing clocks by one hour during the summer.
During Daylight Saving Time, the sun appears to rise one hour later in the morning, when people are usually asleep anyway, and sets one hour later in the evening, seeming to stretch the day longer.
It first occurs during DST time, then clocks are turned back one hour to normal time and the time is repeated during normal time.
www.timeanddate.com /time/aboutdst.html   (818 words)

  Time Zone -- from Eric Weisstein's World of Astronomy
Time zones eliminate the problem that local noon (defined according to the elevation of the Sun) actually occurs at a different time for nearby towns at slightly different longitudes, so that each town's clocks differ by a few minutes from those of neighboring clocks.
Time zones are usually specified by the number of hours they differ from Greenwich mean time.
A construct related to time zones is the international date line at the 180° meridian, which occurs (mostly) in the middle of the time zone offset 12 hours from Greenwich.
scienceworld.wolfram.com /astronomy/TimeZone.html   (533 words)

 The Time Zones of the United States   (Site not responding. Last check: 2007-10-15)
Time shown is Eastern Standard Time as observed in the state capitol of Indianapolis.
Mountain Standard Time [Daylight] is the time observed by the Rocky Mountain states of Colorado, Montana, New Mexico, Utah and Wyoming and portions of the states of Arizona, Idaho, Kansas, Nebraska, North Dakota, Oregon and South Dakota.
Pacific Standard Time [Daylight] is the time observed by the western states of California, Nevada and Washington and portions of the states of Idaho and Oregon.
www.clockvault.com /timezones   (480 words)

 standard time - HighBeam Encyclopedia
Within a zone all civil clocks are set to the same local solar time.
Its establishment in the United States was mainly due to the efforts of the educator Charles Dowd and William Allen, secretary of the American Railroad Association.
In the United States, time zones are regulated by the Dept. of Transportation.
www.encyclopedia.com /doc/1E1-stndtime.html   (290 words)

 Full text - Daylight Saving Time - United States Law - 15 USC 6(IX)(260-7)
It is the policy of the United States to promote the adoption and observance of uniform time within the standard time zones prescribed by sections 261 to 264 of this title, as modified by section 265 of this title.
The limits of each zone shall be defined by an order of the Secretary of Transportation, having regard for the convenience of commerce and the existing junction points and division points of common carriers engaged in interstate or foreign commerce, and any such order may be modified from time to time.
Within the respective zones created under the authority of sections 261 to 264 of this title the standard time of the zone shall insofar as practicable (as determined by the Secretary of Transportation) govern the movement of all common carriers engaged in interstate or foreign commerce.
webexhibits.org /daylightsaving/usc.html   (834 words)

 More on Time Zones
Time zones partially rectified the problem by setting the clocks of a region to the same mean solar 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 Sandford Fleming because of the need of railroad companies to have consistent local times between railroad stations.
www.eduhistory.com /time-zones.htm   (982 words)

 NY Times
The United States covered this lap in her maiden voyage race across the Atlantic at the sensational speed of 36.17 knots, the equivalent of 41.64 land miles an hour.
United States maritime authorities on board question whether the fastest warships in the world could make such a run; and as for commercial vessels, the United States would show her heels to the best of any seafaring nation.
She did not salute, but at dinner time as the United States lifted anchor and moved past the breakwater to the terminal, harbor craft and the port whistled salutes, and fireboats shot bright plumes of spray in the clear afternoon sunshine.
www.ss-united-states.net /WebPages/PagesNYTimes.htm   (9866 words)

 USA States . com - US states Portal
Time zones are based on a system that uses lines of longitude as borders.
The United States of America is a federal republic composed of 50 states, of which all except one - Hawaii islands - are in mainland America.
The United States of America, which covers the central part of North America, grew out of the British colonies that were established in the north America in the first half of the 17th century.
www.usastates.com   (651 words)

 History of standard time in the United States - Wikipedia, the free encyclopedia
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).
Standard time in time zones was not established in U.S. law until the Act of March 19, 1918, sometimes called the Standard Time Act.
en.wikipedia.org /wiki/History_of_standard_time_in_the_United_States   (584 words)

 Space Today Online -- Solar System Planet Earth -- Angkor
Because Great Britain was the major world power at the time, it placed the center of the first time zone at England's Royal Greenwich Observatory, which was located on the 0-degree longitude meridian.
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.
Time zones in the U.S. weren't considered necessary until trains criss-crossed the country.
www.spacetoday.org /Time/UTC.html   (1293 words)

 Standard Time around the World
Standard time was fixed in 1883 to prevent the myriad of short time differences that would result if every locality determined the mean solar time by different meridians, depending on the longitude of the particular place.
Alaska Standard Time is determined by the meridian at 135° west of Greenwich and Hawaii-Aleutian Standard Time is set at the 150° meridian.
The time in each zone is one hour earlier than in the zone to its east and one hour later than in the zone to its west.
www.circ.uab.edu /nypldr/1time/standard.htm   (363 words)

 Time Zones of the United States
The six standard time zones for the United States and a seventh zone which encompasses Puerto Rico and the U.S. Virgin Islands.
The railroads instituted standard time in time zones in the United States and Canada on November 18, 1883.
The Time Zones of the United States map layer shows the six standard time zones for the United States, and a seventh zone, which encompasses Puerto Rico and the U.S. Virgin Islands.
nationalatlas.gov /mld/timeznp.html   (333 words)

 LearningStation ResourceCenter: Time/Current Time
American Time Zones - Displays a map of the main parts of the United States, showing the time zones and the current local time.
Convert time between time zones (cities), or create a printable reference card with base reference and cities of your interest.
Close to 100 different time zones supported, as well as the ability to select the default time zone.
resource.learningstation.com /Time/Current_Time/index.html   (708 words)

 Daylight Time
Currently, daylight time begins in the United States on the first Sunday in April and ends on the last Sunday in October.
Many other countries observe some form of "summer time", but they do not necessarily change their clocks on the same dates as the U.S. Daylight time and time zones in the U.S. are defined in the U.S. Code, Title 15, Chapter 6, Subchapter IX - Standard Time.
History of Daylight Time in the U.S. Although standard time in time zones was instituted in the U.S. and Canada by the railroads in 1883, it was not established in U.S. law until the Act of March 19, 1918, sometimes called the Standard Time Act.
aa.usno.navy.mil /faq/docs/daylight_time.html   (547 words)

 World Time Scales
It was not until December of 1854 that the Secretary of the Navy officially designated this growing institution as the "United States Naval Observatory and Hydrographic Office." Through all of the ensuing years, the USNO has retained timekeeping as one of its key functions.
A compromise time scale was eventually devised, and on January 1, 1972, the new Coordinated Universal Time (UTC) became effective internationally.
The individual zone boundaries are not straight, however, because they have been adjusted for the convenience and desires of local populations.
physics.nist.gov /GenInt/Time/world.html   (646 words)

 WR Consulting : united states time zones   (Site not responding. Last check: 2007-10-15)
united states time zones: We are adamant in doing whatever it takes to find the best solution, making each project successful, meeting and exceeding all the requirements of our clients and partners.
united states time zones: Our software developers are some of the most talented, spirited people when it comes to innovating or giving you the right solution.
united states time zones: WR Consulting has always been comprised of highly motivated, trained professionals who are enthusiastically contributing in their own ways towards the organization's objectives.
www.wrconsulting.com /world_clock/united_states_time_zones/default.htm   (1500 words)

 USA Time Zones: Standard Time + Daylight Saving Time + Time Zone information
The United States of America, also referred to as the United States, the U.S. the USA, America, and the States (colloquially), is a federal republic of 50 states, located primarily in central North America.
Forty-eight of the states, "the continental" or "contiguous 48 states" are located in a single region between Canada and Mexico.
Daylight Saving Time, for the U.S. and its territories, is NOT observed in Hawaii, American Samoa, Guam, Puerto Rico, the Virgin Islands and the state of Arizona (not the Navajo Indian Reservation, which does observe).
greenwichmeantime.com /local/usa/index.htm   (405 words)

 NIST: Time and Frequency Division - Division 847
The Time and Frequency Division, part of NIST's Physics Laboratory, maintains the standard for frequency and time interval for the United States, provides official time to the United States, and carries out a broad program of research and service activities in time and frequency metrology.
The division develops and maintains the primary standards for frequency and time interval in the United States.
NIST researchers are also demonstrating the potential to fabricate and assemble the physics package using the low-cost, mass-production techniques used to make semiconductor devices, which should eventually lead to a complete atomic clock about 1 cubic centimeter in size (about the size of a pencil eraser) powered by a battery.
www.bldrdoc.gov /timefreq   (331 words)

 United States time zones - Education - Information - Educational Resources - Encyclopedia - Music
United States time zones are composed of six long-established zones determine time reckoning, in conjunction with state and national legislation regarding the use of Daylight Savings Time.
Most use the standard time for their zone (or zones, where a state is divided between two zones), except for using daylight savings time from 2 AM on the first Sunday in April until 2 AM on the last Sunday in October.
Zones used in states beyond the contiguous U.S. Alaska Standard Time (AKST; UTC -9; NATO zone V), which comprises most of the state of Alaska.
www.music.us /education/U/United-States-time-zones.htm   (705 words)

 United States Maps - Perry-Castañeda Map Collection - UT Library Online
State Maps with County Boundaries U.S. Bureau of the Census (1990)
Metropolitan Areas of the Eastern United States, 1992 U.S. Bureau of the Census, 1990 Census of Population (1990 CP-1-1)(186K)
Metropolitan Areas of the Western United States, 1992 U.S. Bureau of the Census, 1990 Census of Population (1990 CP-1-1)(95K)
www.lib.utexas.edu /maps/united_states.html   (498 words)

 Time Zones for PCs - Time Zones by Country
We have designed it to have 100% coverage of all the time zones in the world.
You no longer have to guess whether somewhere is in daylight saving time or not.
at this time you can look up the time zone and current local time for any country and city in the database right here.
www.timezonesforpcs.com /time   (121 words)

 WR Consulting :: ZoneTick :: United States Time Zones   (Site not responding. Last check: 2007-10-15)
United States Time Zones: Our mission is to provide our clients with the best available expertise in the field of software and hardware development.
United States Time Zones: Distributed systems, network security, mail and collaboration services, performance tuning, code and design reviews are just a few of the many areas where we and our products can help solve your problems.
United States Time Zones: WR Consulting has always been comprised of highly motivated, trained professionals who are enthusiastically pouting their souls into, and contributing in their own ways, towards the organization's objectives.
www.wrconsulting.com /products/united_states_time_zones/default.htm   (1003 words)

 Time zones and languages - Wiki Gonzalez
As far as Primates can tell, the language and time zone that appear on BTF are not "your" customized selections, but those of the last user to submit a comment.
Most often, that user is an English speaker from one of the United States' four time zones, but not always.
The best way to determine the current BTF time zone is to look at the time on the most recent post on the Hot topics bar, and subtract it from your local time.
digamma.net /btfwiki/index.php/Time_zones_and_languages   (508 words)

 Universal Time   (Site not responding. Last check: 2007-10-15)
Universal Time, Greenwich Mean Time (GMT), and Zulu (Z), are based at the prime meridian (0° longitude) of Earth and are used by scientists to avoid confusion of time zones.
Here's the time right now in several time zones according to the Naval Observatory.
The result of your arithmetic is the local time in your Pacific Rim country on a 24 hour clock.
vathena.arc.nasa.gov /curric/weather/pacrim/utime.html   (290 words)

 JS Online: When it comes to time zones in the United States, it's all business
In a country as large as the United States, time differences are extremely important as we work to maintain communication with our customers and colleagues.
People assume time zone lines were drawn by the federal government, but that's not how it happened.
Previously, time had been determined by the position of the sun with high noon the only existing standard of exact local time.
www2.jsonline.com /bym/career/feb04/207786.asp   (777 words)

 current times in u.s. states map
Daylight Saving Time is not observed in Hawaii, American Samoa, Guam, Puerto Rico, the Virgin Islands, and by most of Arizona (with the exception of the Navajo Indian Reservation).
Alaska (AK) 90% of Alaska is (1 hour) behind the Pacific Time Zone, while the far reaches of the Aleutian Islands use Hawaii-Aleutian time.
Important (current time) Exceptions: Parts of Florida, Idaho, Indiana, Kansas, Kentucky, Michigan, Nebraska, North Dakota, Oregon, South Dakota, Tennessee and Texas are in two time zones.
www.worldatlas.com /webimage/countrys/namerica/usstates/timezone.htm   (287 words)

 United States Time Zones
United States Time Zones and current local times
The time in United States, Alaska is 23:36:11 (11:36:11 PM)
The time in United States, Hawaii is 21:36:11 (09:36:11 PM)
www.countrycallingcodes.com /multizones.php?country=United+States   (89 words)

 North American Time Zones and GMT   (Site not responding. Last check: 2007-10-15)
Thus all observations have a corresponding time, and that time is reported along with the measurement.
By convention, weather scientists use the twenty four hour clock, and use one time zone, Greenwich Mean Time (GMT).
To convert to local time, we must know the time difference between GMT and local time for both standard time and summertime (daylight savings time).
atm.geo.nsf.gov /ieis/time.html   (162 words)

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