To see more detail view our larger format world time zone map.
Time zones to the east of the Greenwich meridian are later and time zones to the west of the Greenwich meridian are earlier. The Greenwich meridian time zone is 7 1/2 degrees east and 7 1/2 degrees west of zero degrees longitude. This line runs through the United Kingdom, France, Spain, Algeria, Mali and Ghana in Africa. The time convention begins with Universal Coordinated Time (UTC) which is also commonly referred to as Greenwich Mean Time (GMT) being located at the Greenwich meridian. In theory time zones are based on the division of the world into twenty four time zones of 15 degrees longitude each. map of the United States of America with the Limits of the four time zones. The world time zone map indicates the standard time zones actually observed. Most countries do not adjust their time zone observance and when they do it most likely involves small boundary changes or changes in the observance of daylight saving time. Explore the dataĬurious about America’s time zones? The National Transportation Atlas Database provides a digital representation of the geographic boundaries for the nine time zones that cover United States and its territories.The world time zone map uses a repeating color scheme to designate the different standard time zones observed in each country. National Council of State Legislatures map shows States with legislative activity to adopt year-round DST. Some States have enacted legislation to adopt DST as their permanent setting, pending federal approval. Learn about the six standard time zones in the US and their history and FAQs. Search the city in the search field or just hover it on the map to see it’s time zone information. States can opt-out from DST, but such an exemption must apply to the entire portion of that State that lies in a given time zone (some states, like North Dakota, straddle two different zones). See the live map of US time zones with daylight saving time and the latest time in each zone. How to use our map of world time zones You may see the offset to UTC (Universal coordinated time) at the bottom of the map. See a map of the contiguous US time zones and the DST rules for each zone. Currently, DST begins the second Sunday in March and ends the first Sunday in November. Learn about the nine time zones used by the US and its territories, and how they vary by location and season. Congress has amended time change laws several times since then. The Standard Time Act of 1918, “an Act to save daylight and to provide standard time for the United States,” authorized the nation’s first “Daylight Saving Time” to begin on the last Sunday of March and conclude on the last Sunday of October.
time zones as recorded in the National Transportation Atlas Database Daylight Saving Time rules begin in 1918 but have changed through the years Department of Transportation to change their time zone.Ĭurrent U.S. The early maps had today’s four time zones for the coterminous states, but the boundaries were very different from today. Time zone map of the United States from 1913, as published in the Chicago Daily News Almanac and Yearbook. This article provides an overview of the Tennessee Time Zones Map and outlines each zone so that you can easily identify which zone you in. British railroads were the first to adopt standard time in 1840, and railroads in the US and Canada adopted standard time zones in 1883. Tennessee Time Zone Map: Navigating the different time zones within Tennessee can be tricky but it doesn’t have to be. Thank the railroads for our standard time zonesīefore time zones were created, each locality set its own clocks to noon at the time of day when the sun was at its highest position. Virgin Islands) don’t practice the spring and autumn time change. territories (American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the U.S. Some states (Hawaii, Arizona-except for the Navajo Nation within the state) and U.S. The time zone for the capital Washington, D.C. Last weekend, millions of Americans turned back their clocks one hour to mark the return from Daylight Saving Time to Standard Time. dependent territories) has 11 time zones. Advisory Council on Transportation Statistics.National Transportation Knowledge Network.National Transportation Library Main - Library.Six time zones are indicated by different colors on the United States time zone map. Vehicle Inventory and Use Survey (VIUS) The United States Time Zone Map shows the standard time zone divisions observed throughout the fifty states.Transportation Statistics Annual Reports.