Uniform Time Act

The Uniform Time Act of 1966, Pub.L. 89–387, 80 Stat. 107, enacted April 13, 1966, was a Law of the United States to "promote the adoption and observance of uniform time within the standard time zones" prescribed by the Standard Time Act of 1918. Its intended effect was to simplify the official pattern of where and when daylight saving time (DST) is applied within the U.S. Prior to this law, each state had its own scheme for when DST would begin and end, and in some cases, which parts of the state should use it.[1]

Uniform Time Act
Long titleAn Act to promote the observance of a uniform system of time throughout the United States.
NicknamesUniform Time Act of 1966
Enacted bythe 89th United States Congress
EffectiveApril 1, 1967
Public law89-387
Statutes at Large80 Stat. 107
Acts amendedStandard Time Act of 1918
Titles amended15 U.S.C.: Commerce and Trade
U.S.C. sections created15 U.S.C. ch. 6, subch. IX §§ 260–267
Legislative history
  • Introduced in the Senate as S. 1404
  • Passed the House on March 16, 1966 (292–93, in lieu of H.R. 6785)
  • Reported by the joint conference committee on March 30, 1966; agreed to by the House on March 30, 1966 (282–91) and by the on  
  • Signed into law by President Lyndon B. Johnson on April 13, 1966