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Standard Time Act

From Wikipedia, the free encyclopedia

Standard Time Act
Great Seal of the United States
Long titleAn Act to save daylight and to provide standard time for the United States.
NicknamesCalder Act
Standard Time Act of 1918
Enacted bythe 65th United States Congress
EffectiveMarch 19, 1918
Public law65-106
Statutes at Large40 Stat. 450
U.S.C. sections created15 U.S.C. ch. 6, subch. IX §§ 261–264 [1]
Legislative history

The Standard Time Act of 1918, also known as the Calder Act, was the first United States federal law implementing Standard time and Daylight saving time in the United States.[2] It authorized the Interstate Commerce Commission to define each time zone.

The section concerning daylight saving time was repealed by the act titled An Act For the repeal of the daylight-saving law, Pub.L. 66–40, 41 Stat. 280, enacted August 20, 1919, over President Woodrow Wilson's veto.

Section 264 of the act mistakenly placed most of the state of Idaho (south of the Salmon River) in UTC−06:00 CST (Central Standard Time), but was amended in 2007 by Congress to UTC−07:00 MST (Mountain Standard Time).[3] MST was observed prior to the correction.

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  • How did trains standardize time in the United States? - William Heuisler


The development and spread of railroads across the United States brought a wave of changes to American life. During the railroad boom, thousands of jobs were created, new towns were born, trade increased, transportation was faster, and the overall landscape of the nation transformed. But, perhaps the most interesting change of all is the least known: the establishment of standard time. Today, we know if it is 6:28 a.m. in Los Angeles, it is 9:28 a.m. in New York, 2:28 p.m. in London, 5:28 p.m. in Moscow, and 10:28 p.m in Tokyo. No matter where you are, the minute and second are the exact same. But, before the railroads, there was no need for a national or global clock, and each town kept its own local time. So when it was 12 noon in Chicago, it was 12:07 p.m. in Indianapolis, 11:50 a.m. in St. Louis, and 11:27 a.m. in Omaha. This worked just fine when the only modes of travel were horses or steamboats, but it became incredibly problematic when railroads came along. How can you keep a train schedule when each town has its own time? And how do you prevent collisions or accidents on the tracks if train conductors are using different clocks? It doesn't really make sense to leave a station at 12:14 p.m., travel for 22 minutes, and arrive at 12:31 p.m. In order to eliminate that confusion, the railroads of the United States and Canada instituted standard time zones on November 18, 1883 at noon. It allowed the railroad companies to operate more effectively and reduce deadly accidents. The American public, however, was not so quick to embrace this new change, as many cities continued to use their own local time. Resistance was so strong that, in some towns, clocks would show both the local time and the railway time. Imagine this conversation: "Pardon me, sir. Do you have the time?" "Why yes, which do you need? It's 12:13 local time and 12:16 railway time." Ultimately, the logic of keeping a standard time prevailed, and the United States government made time zones a matter of law with the Standard Time Act of March 19, 1918. Since then, there have been numerous changes to the time zones, but the concept of standard time has remained. But, the United States was actually not the first to develop standard time. The first company to implement the use of standard time was the Great Western Railway in 1840 in Britain, and by 1847, most British railways were using Greenwich Mean Time, or G.M.T. The British government made it official on August 2, 1880 with the Statutes, or Definition of Time, Act. But, while Britain may have been the first to establish standard time, it is Asia and the islands of the South Pacific that enjoyed the first hour of each new day. The International Date Line passes through the Pacific Ocean on the opposite side of the Earth from the Prime Meridian in Greenwich where, thanks to trains, standard time was first used. Trains have evolved over the years and remain a prominent form of transportation and trade throughout the world. And, from the New York City subways to the freight trains traveling across the Great Plains, to the trolleys in San Francisco, they all know exactly what time it is. And, thanks to them, we do too!

See also


  1. ^ The Uniform Time Act of 1966. Pub.L. 89–387, 80 Stat. 107, enacted April 13, 1966
  2. ^ Prerau, David (2006). Seize the Daylight: The Curious and Contentious Story of Daylight Saving Time. p. 90. ISBN 978-1-56025-796-7.
  3. ^ U S Congress (2010). Congressional Record, V. 153, PT. 4, February 17, 2007 to March 12, 2007. BERNAN Press. p. 5309. ISBN 9780160869761. Retrieved May 14, 2015.
This page was last edited on 12 March 2021, at 08:41
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