United States time zone and Daylight Saving Time law
This article is about the U.S. statute. For the Irish statute, see Standard Time Act, 1968. For the New Zealand statute, see Standard Time Act 1945.
Standard Time Act
Long title
An Act to save daylight and to provide standard time for the United States.
Nicknames
Calder Act Standard Time Act of 1918
Enacted by
the 65th United States Congress
Effective
March 19, 1918
Citations
Public law
65-106
Statutes at Large
40 Stat. 450
Codification
U.S.C. sections created
15 U.S.C. ch. 6, subch. IX §§ 261–264 [1]
Legislative history
Introduced in the Senate as S. 1854 by William M. Calder (R-NY)
Passed the House on March 15, 1918 (253-40)
Signed into law by President Woodrow Wilson on March 19, 1918
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 defined five time zones for the continental United States and authorized the Interstate Commerce Commission to define the limits of 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The section concerning daylight saving time was repealed by the act titled An Act For the repeal of the daylight-saving law, Pub.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.Tooltip Public Law (United States) 66–40, 41 Stat. 280, enacted August 20, 1919, over President Woodrow Wilson's veto.
As a result of an 1966 amendment of Section 261 to add more time zones, the wording in Section 264 of the act wrongly 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.
^The Uniform Time Act of 1966. Pub. L.Tooltip Public Law (United States) 89–387, 80 Stat. 107, enacted April 13, 1966
^Prerau, David (2006). Seize the Daylight: The Curious and Contentious Story of Daylight Saving Time. Thunder's Mouth Press. p. 90. ISBN 978-1-56025-796-7.
^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.
StandardTimeAct of 1918, also known as the Calder Act, was the first United States federal law implementing Standardtime and Daylight saving time in...
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the adoption and observance of uniform time within the standardtime zones" prescribed by the StandardTimeAct of 1918. Its intended effect was to simplify...
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adopted in the United States until the StandardTimeAct of March 19, 1918, which confirmed the existing standardtime zone system and set summer DST to begin...
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order to take effect. The Uniform TimeAct of 1966 permits states to opt out of DST and observe permanent standardtime, but it does not permit permanent...
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