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. Contiguous US time zones Eastern time zone - UTC-04:00 daylight saving time UTC-05:00 standard time Central time zone - UTC-05:00 daylight saving time UTC. 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. 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). Currently, DST begins the second Sunday in March and ends the first Sunday in November. 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. British railroads were the first to adopt standard time in 1840, and railroads in the US and Canada adopted standard time zones in 1883. Hover your mouse over the map to highlight time zones. 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. If a time zone is 15 degrees of longitude wide, then places at the edge of the zone would have a solar time 30 minutes different from places at the center of. Last weekend, millions of Americans turned back their clocks one hour to mark the return from Daylight Saving Time to Standard Time. Advisory Council on Transportation Statistics.National Transportation Knowledge Network.National Transportation Library Main - Library.Vehicle Inventory and Use Survey (VIUS).Transportation Statistics Annual Reports.Local Area Transportation Characteristics (LATCH dataset).Government Transportation Financial Statistics.Freight Logistics Optimization Works (FLOW).Statistical Products and Data Main - Statistical 1.Transportation Maps and Geospatial Data.Introduction to Transportation Statistics. ![]() Each time zone was separated by 15 degrees. Who invented the time zone? Sir Sandford Fleming developed the system in 1878 that divided the world into 24 different time zones. How long has time zones been around? The worldwide time zone system was developed in 1878. What time zones have the most states? The time zone that covers the most states is the Eastern Standard Time Zone (EST) How many different time zones are in the US? There are six different time zones including Alaska and Hawaii. (Mountain Daylight Time) UTC/GMT -6 hours. Calendars Home Calendar 2023 Calendar 2024 Monthly Calendar Printable Calendar (PDF). What is the latest time zone in the United States? Eastern Standard Time Zone (EST) is the latest time zone by the hour. Time Zone Map Time Zone Abbreviations Daylight Saving Time Time Changes Worldwide Time Difference Time Zone News. WA OR NV CA PACIFIC WY UT NM MT ID CO AZ MOUNTAIN WI TX TN SD OK ND NE MO MS MN LA KS IA IL AR AL CENTRAL VA VT WV SC RI PA OH NC NY NJ NH MI MA MD ME KY IN GA FL DE CT EASTERN Eastern Standard Time Zone Connecticut (CT) ![]() The other two are Alaskan Standard Time (AKST) and the Hawaii-Aleutian Standard Time (HST). However, the United States actually has six standard time zones. The most familiar four major United States time zones are Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), and Pacific Standard Time (PST). ![]() View the live map of US time zones below.
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