Категория: Windows: Часы, будильники
What is a time zone?
Time zone is a part on earth which shows a standard time in the world and according to that the times of different countries are set. The time is standardized because different countries want to do some social, commercial and economic businesses with other countries and the division between the two countries and their times tell that what is the day time in another country and is it the business hour or not.
Time zone maps are very important as they let us know that how we can see the current time of a particular city and country. These maps are very helpful as they convert the time of one country in to your own time so that one may know the exact time in another country.
Online time zone maps:
Time zone maps are available online and you are only needed to click or pick a city you want to know about and it will show the time of that particular country or city. Many websites offer the time zone maps and these are also very easy to use.
Importance of time zone maps:
The time zone map is divided in to 24 sections. These time zone maps are very important in today’s business as they let us know that what is the time in another country and is it day or night. People can not only run their business easily overseas but they can also see the programs broadcasted in other countries according to their local time. These time zone maps work as the time difference calculators which help in knowing the difference between two countries.
Country and state wise time zone maps:
There are not only time zone maps of the world are available but also of different specific countries. We all know that some countries are so broad that there is huge time difference between the times of the two countries. Russia and USA are so broad that’s why country wise time zones are available so that the people can get facilitated by knowing the time difference in other states. These maps are also very beneficial when people want to go on attending a business meeting or some conference, they can use these maps, calculate the time difference and they can make their way to their destinations to be in time. These maps remove all sort of confusion in the minds of people by eliminating the task of making manual calculations.
So, we can say that time zone maps are very helpful in numerous ways. They not only save time and capacity but also from the tension of calculations and confusion of time difference. These are being used extensively these days. Now, people with few clicks on the internet can know about the time of other country or state and set their meetings and other schedules with the overseas citizens easily. Another good thing about this service is that it is 100% free. You can check any time on these websites and get the respective information according to your needs. This is so easy and less time consuming.
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Updated August 31, 2015.
The conterminous United States is composed of four time zones - Eastern, Central, Mountain, and Pacific. Each county is assigned to one of the four time zones.
The four time zones of the 48 conterminous United States (boundaries are indicated by the red line). County boundaries are shown in gray and state boundaries are dark blue.
Most of Alaska is in the Alaskan Time Zone but a portion of the Aleutian Islands are in the Hawaii-Aleutian Time Zone. Alaskan time is one time zone west (behind) Pacific Time. Hawaii is two time zones west of Pacific Time (however, Hawaii does not use Daylight Saving Time so during Daylight Saving Time, it is three hours behind Pacific Time.
Arizona, while it is in the Mountain Time Zone, also does not utilize Daylight Saving Time. The portions of Indiana in the Eastern Time Zone previously did not observe Daylight Saving Time. Also, find out more information about Indiana's interesting time zone history .
Across the European continent, Daylight Savings Time is now in effect.
Iceland does not use Daylight Saving Time and remains on UTC Time permanently.
The local time in the United Kingdom (UK) in the summer is referred to as BST British Summer Time. In winter it's referred to as GMT, and is based upon the UTC time in Greenwich, England.
The massive country of Russia is stretched across eleven times zones, more than any other country. On this map page we display the current time for European Russia, or Moscow Time.
Canary Islands and Madeira Islands are now on WET Time.UTC and GMT an update
The worldwide standard for coordinated universal time, formerly known as GMT (Greenwich Mean Time), is now abbreviated as UTC (Coordinated Universal Time).
Some sources still refer to it as UTC/GMT and some web browsers, e.g. Mozilla Firefox, still display it as GMT.
The UTC Time (shown directly below) is the standard time zone upon which all other worldwide time zones are based. It never observes daylight saving time.
Source: National Institute of Standards and Technology Physics Laboratory
Time zones did not become necessary in the United States until trains made it possible to travel hundreds of miles in a day. Until the 1860s most cities relied upon their own local “sun” time, but this time changed by approximately one minute for every 12 miles traveled east or west. The problem of keeping track of over 300 local times was overcome by establishing railroad time zones. Until 1883 most railway companies relied on some 100 different, but consistent, time zones.
That year, the United States was divided into four time zones roughly centered on the 75th, 90th, 105th, and 120th meridians. At noon, on November 18, 1883, telegraph lines transmitted GMT time to major cities where authorities adjusted their clocks to their zone's proper time.
On November 1, 1884, the International Meridian Conference in Washington, D. C. applied the same procedure to zones all around the world. The 24 standard meridians, every 15 east and west of 0 at Greenwich, England, were designated the centers of the zones. The international dateline was drawn to generally follow the 180 meridian in the Pacific Ocean. Because some countries, islands and states do not want to be divided into several zones, the zones' boundaries tend to wander considerably from straight north-south lines.
Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.
Time Measurement, Time Zones, and the International Date Line
Time zones were created in order to standardize the time of day around the world, because of the Earth's rotation.
Before time zones and clocks, the sundial was used to keep local solar time, which varied throughout the year, depending on the season and by longitude. Each city kept its own local standard time based on longitude.
With globalization, there came an increasing need for the standardization of time zones, particularly for transportation (namely railways) and communications across longitudes. While mariners began developing a system for tracking time zones, the concept flourished in the 1800s, when railroads became a popular mode of transportation.
Various methods for standardized time zone system were proposed throughout the mid-nineteenth century, which divided the United States into several time zones, each an hour apart. The worldwide system was proposed by Sandford Fleming in 1879, which divided the earth into 24 time zones, beginning at Greenwich, the 180th meridian, and each 15° apart.
Today, these world time zones are followed as shown on the map above. Most countries follow the hourly deviations, though they do not always align with longitudes for convenience, in order to incorporate the entire country. Some countries, including India and Iran, use half-hour deviations instead, and some choose to use just one time zone for the entire country, like China.
Last Updated On. July 22, 2015
* World time zone map showing current local time around the world
Disclaimer: All efforts have been made to make this image accurate. However Compare Infobase Limited and its directors do not own any responsibility for the correctness or authenticity of the same.Time Zones
The sun shines on only half of the Earth's surface because the Earth is a rotating sphere. This means that it is morning, evening, and night at different parts of the world. Each country or a part of the country uses a local time to offset these differences. A region of Earth's surface which uses a single local time is called a Time Zone. There are 24 one-hour time zones around the world. These are arranged in vertical longitudinal bands.
This map displays the standard time zones and the current local time at different places in the world, and is a useful resource and aid for school children, parents, teachers, travelers, and anyone else who wishes to learn about the different time zones.Universal time and Local time
Local time is the measure of the position of the Sun relative to a locality- a country, city, or a town. Local time varies from place to place on earth. Standard time is the official local time in a country or part of the country. Although time zones are arranged in longitudinal bands, in some places they are skewed and are determined by geographical factors or a country's borders.
Most countries have just one time zone, but some large countries such as Canada, Russia and the USA are split over several time zones. As a result, standard time varies across these countries. The USA has nine standard times; four of the main ones are called- Eastern, Central, Mountain, and Pacific. On the other hand, China, spread out over five time zones, uses one standard time.
Before 1972, the universal time was taken as the local time in Greenwich, England at the Prime Meridian at 0° longitude. Coordinated Universal time (UTC) has replaced Greenwich Mean Time (GMT) as the international reference used to set the local time in each time zone.The International Dateline
The world uses local times at different countries rather than a single universal time. The international dateline is an imaginary line joining the two Poles that roughly corresponds to the 180° line of longitude, though it zigzags to allow for local geographical considerations. The date in the eastern hemisphere is one day ahead of the date in the western hemisphere. When moving from west to east across the dateline, we go back one day. Similarly, while moving from east to west, we add a day.
If you are a Phileas Fogg, then you would really need to be savvy about time zones around the world. Going around the world in eighty days surely must have been befuddling for him as it is for me sitting in my armchair. Time is the one thing that controls our life, more than anything else.
As you sit here reading this post, you are a traveler in some sense of the word. The post has been written by someone who has probably seen the sun set, while you might not yet have seen it rise.
If you are a web worker, then time zones take on a different urgency. You really need to be on top of it so that you can meet your deadlines or send out something at the exact time.
Working out the time (and date) difference is quite easy with the number of web tools we have at hand. Time zone converters easily do the clock math for you. There are even handy tools that help you email smarter as per the time zone.
Being a visual person, I sometimes like to visualize the time zones across the world on a map. We have covered some before. Here’s a list of ten interactive time zone maps.Time Ticker
Time Ticker is an interactive Flash clock which shows the current times around the world. You get accurate atomic times by moving your mouse over the map and highlighting the region. You can be more specific with the list boxes that give the names of the cities and town for that region. The difference with GMT and Daylight Saving Time if active is displayed. If you have a Real Player installed, the time map can even announce the time. An added feature lets you adjust your computer clock (IE and Windows required). You can also get TimeTicker on your iPhone or iPod.[NO LONGER WORKS] TimeZoneCheck
With Time Zone Check, you get three clocks and a world map. Hovering your mouse over any location tells you the standard time and the Daylight Saving Time if any. You can compare these two clocks with the third, which takes your local time from the computer’s clock. A search field helps to locate the time for any place on Earth. You can also save your locations. A narrow strip at the bottom of the browser windows indicates the date by using color.
Read the previous mention Time Zone Check in our Directory .
Time.is covers 7 million locations around the world and helps you to compare their time with your own. All that with a large digital clock. The web app takes into account DST and also mentions the sunrise and sunset time. An information list tells you about the time zone details, the latitude and longitude, demographic information, details on holidays and observances for the day, and a Wikipedia link.
Using Time.is and its atomic clock feedback, you can adjust your own PC clock. Other options allow you to alternate between white and black themes for the clock display and a few display format changes.Every Time Zone
Every Time Zone describes in a line the reason behind easy interactive time zone maps: Never warp your brain with time zone math again.
Every Time Zone is an online service that automatically converts your local time to 12 time zones so that you don’t have to do it yourself. The times displayed for the cities are offset from the UTC. DST is also indicated in brackets. Moving the green slider for the local time adjusts the time accordingly in other zones. The relative time of the day is also indicated by the colored tones of the bars.
The cities covered for each region are Honolulu, San Francisco, Chicago, New York, Rio de Janeiro, London, Vienna, Mumbai, Hong Kong, Tokyo, Sydney, and Auckland.
Read the previous mention Time Zone Check in our Directory .24TimeZones
The Flash application displays world times on an interactive map. You can know the current time with a mouseover on the indicated time zones or locations. The map can be customized to set your own clocks for three time zones around the world. Clicking on any location takes you into a more detailed informational page with information like DST offsets and time for any other cities nearby.
Qlock is the simplest app which is on our list. Mouse the mouse over the screen to note the current times or find a city using the search box. The little time box also shows the difference with the GMT, and DST if any. You can find out the whereabouts of a location from the Google maps that come with the clock. Qlock also comes as a downloadable app for Windows, iPhone, and the iPad.Daylight Map
At first glance, Daylight Map shows the world as night and day. Getting into the Options lets you set clocks (up to 10) for any areas on the map. You can set the clocks by address, by map click, or by latitude and longitude. Clocks can be analog, digital, or color coded. You can also select to set the location of the sun at the present moment.
Entering the site, you have the cool nighttime view (Night mode) which takes in data from Google and shows the lighted up areas around the Earth. If you want to see the time zones in greater detail, the Google Maps API displays it all with color codes.World Time Zone
World Time Zone is like a quick reference chart that displays the time zones in detail. DST is also indicated by yellow markers on the map.Daylight Saving Time
With Daylight Saving Time’s chart like display you can easily see how changes in DST can shift time differences. You can select two locations and see the time difference in color during the current and subsequent six month periods. The site also has a meeting scheduler (with a free starter edition) which can integrate with your Google calendar or Gmail.Google Earth
Time zones can be easily visualized on Google Earth. You just need the right KML file. The Google Earth Library has one which is a bundle of different world time zone data and maps found on the web. From the CIA Factbook to Barnabu’s cool visualization tool, you have a few options to play around with.
You can also combine the Firefox add-on Fox Clocks with Google Earth. Though it won’t show you a time map on Google Earth, it will take you there when you click on the time information of a location.
If I remember my classic, it was the late realization of the International Date Line that won Phileas Fogg the bet. It may not be so drastic for us, but these time zone visualization tools make it far easier for us to be on the clock and on time. Would you agree?
Because Earth is a rotating sphere, the Sun shines on only half of its surface at any one time. Thus, it is simultaneously morning, evening and night time in different parts of the world. Because of these disparities, each country or part of a country adheres to a local time. A region of Earth’s surface within which a single local time is used is called a time zone.
There are 24 one hour time zones around the world, arranged roughly in longitudinal bands.Geography Lesson Idea – Time Zones Standard Time
Standard time is the official local time in a particular country or part of a country. It is defined by the time zone or zones associated with that country or region. Although time zones are arranged roughly in longitudinal bands, in many places the borders of a zone do not fall exactly on longitudinal meridians, as can be seen on the map (above), but are determined by geographical factors or by borders between countries or parts of countries. Most countries have just one time zone and one standard time, but some large countries (such as the US. Canada. and Russia ) are split between several time zones. so standard time varies across those countries. For example, the coterminous United States straddles four time zones and so has four standard times, called the Eastern, Central, Mountain, and Pacific standard times. China is unusual in that just one standard time is used for the whole country, even though it extends across 60° of longitude from west to east.Coordinated Universal Time (UTC)
Coordinated Universal Time (UTC) is a reference by which the local time in each time zone is set. For example, Australian Western Standard Time (the local time in Western Australia) is set 8 hours ahead of UTC (it is UTC+8) whereas Eastern Standard Time in the United States is set 5 hours behind UTC (it is UTC-5). UTC is a successor to, and closely approximates, Greenwich Mean Time (GMT). However, UTC is based on an atomic clock, whereas GMT is determined by the Sun’s position in the sky relative to the 0° longitudinal meridian, which runs through Greenwich, UK.The International Dateline
The International Dateline is an imaginary line from pole to pole that roughly corresponds to the 180° longitudinal meridian. It is an arbitrary marker between calendar days. The dateline is needed because of the use of local times around the world rather than a single universal time. When moving from west to east across the dateline, travelers have to set their watches back one day. Those traveling in the opposite direction, from east to west, must add a day.Daylight Saving Time
Daylight saving is a summertime adjustment to the local time in a country or region, designed to cause a higher proportion of its citizens’ waking hours to pass during daylight. To follow the system, timepieces are advanced by an hour on a pre-decided date in spring and reverted back in the fall. About half of the world’s nations use daylight saving.