• Amerikanisch-Samoa

• United States Minor Outlying Islands

  • Jarvis Island

  • Kingman Reef

  • Midway Atoll

  • Palmyra Atoll

• United States Minor Outlying Islands

  • Johnston Atoll

• USA (HT—Hawaii-Aleutian Time Zone)

  • Alaska

    • Aleutian Islands (west of 169° 30' West)*

  • Hawaii (including Kure Atoll, Pearl and Hermes Reef, and the rest of the uninhabited Northwestern Hawaiian Islands, but excluding Midway Atoll)

• USA  (AKT—Alaska Time Zone)

  • Alaska (most of state)*

• USA (PT—Pacific Time Zone)

  • California*

  • Idaho*

    • north of the Salmon River (between the Oregon state border and the Idaho County/Lemhi County border), and

    • west of the Idaho County/Lemhi County border (between the Salmon River and the Montana state border)

  • Nevada (most of state, except Idaho border towns and West Wendover)*

  • Oregon (most of state, except Ontario and the northern 4/5 of Malheur County)*

  • Washington*

• USA (CT—Central Time Zone)
  • Alabama*,
  • Arkansas*,
  • Florida
    • west of the Apalachicola River, except for the portions of Franklin County and Gulf County south of the Intracoastal Waterway*,
  • Illinois*,
  • Indiana*
    • northwestern
      • Jasper County,
      • Lake County,
      • LaPorte County,
      • Newton County,
      • Porter County, and
      • Starke County,
    • southwestern
      • Gibson County,
      • Perry County,
      • Posey County,
      • Spencer County,
      • Vanderburgh County, and
      • Warrick County,
  • Iowa*,
  • Kansas (most of state)*,
  • Kentucky (western)*,
  • Louisiana*,
  • Michigan (the counties bordering Wisconsin)*
    • Dickinson County,
    • Gogebic County,
    • Iron County, and
    • Menominee County,
  • Minnesota*,
  • Mississippi*,
  • Missouri*,
  • Nebraska (central and eastern)*,
  • North Dakota (most of state)*,
  • Oklahoma (most of state)*,
  • South Dakota (eastern)*,
  • Tennessee*
    • Middle Tennessee,
    • West Tennessee,
    • Bledsoe County,
    • Cumberland County,
    • Marion County, and
    • Sequatchie County
  • Texas (most of state)
  • Wisconsin

• Amerikanische Jungferninseln
   (AT—Atlantic Time Zone)

The crew of the International Space Station observes this timezone in their daily routine.

• Guam (ChST—Chamorro Standard Time)
• Nördliche Marianen (ChST—Chamorro Standard Time)

• Antarktika

  • McMurdo Station**, Amundsen-Scott South Pole Station**, unofficial

• Marshallinseln

  Kwajalein, Eniwetok, and Bikini atolls in the Marshall Islands used to be on UTC−12. Kwajalein advanced 24 hours to the eastern hemisphere side of the International Date Line by skipping 21 August 1993. Eniwetok and Bikini probably advanced even earlier, when the U.S. military relinquished its control of them.

• Wake Island