thumb|300px|UTC−01:00: blue (December), orange (June), yellow (year-round), light blue (sea areas)

UTC−01:00 is an identifier for a time offset from UTC of −01:00.

As standard time (Northern Hemisphere winter)

Atlantic Ocean

  • Portugal
  • Azores islands

As daylight saving time (Northern Hemisphere summer)

North America

  • Greenland (summer)
  • Except areas around Danmarkshavn, and Pituffik (Thule)

As standard time (year-round)

Africa

Atlantic Ocean

  • Cape Verde

Anomalies

Regions in UTC−02:00 longitudes using UTC−01:00 time

  • The westernmost part of legal UTC-01:00 area in Ittoqqortoormiit Municipality (East Greenland)
  • Azores Islands (Portugal)
  • Cape Verde

Areas in UTC−01:00 longitudes using other time zones

Using UTC−02:00

  • The easternmost tip of Greenland (excluding legal UTC-1 and UTC±0 areas)

Using UTC±00:00

In Africa:

  • Liberia
  • Sierra Leone
  • Guinea
  • Guinea-Bissau
  • Senegal
  • The Gambia
  • Sahrawi Arab Democratic Republic (disputed territory)
  • Most of Mauritania
  • Southwestern most part of Mali
  • The very westernmost part of Ivory Coast

In Atlantic Ocean:

  • Madeira (Portugal)
  • Canary Islands (Spain)

In Europe:

  • Most of Iceland, except the westernmost part, including northwest peninsula and main town of Ísafjörður (lies in "physical" time UTC-2)
  • Most of Portugal west of 7.5ºW, except the easternmost part, including cities such as Bragança and Guarda (lies in "physical" UTC)
  • The northeastern part of Greenland, including Danmarkshavn
  • Ireland west of 7.5ºW, including the cities of Cork, Limerick, and Galway
  • The westernmost tip of Northern Ireland, including the county town of County Fermanagh, Enniskillen
  • The westernmost island of the Faroe Islands (autonomous region of the Danish Kingdom), Mykines
  • The extreme westerly portion of the Outer Hebrides, in the west of Scotland; for instance, Vatersay, an inhabited island and the westernmost settlement of Great Britain, lies at 7°54'W. If uninhabited islands or rocks are taken into account St Kilda, west of the Outer Hebrides, at 8°58'W, and Rockall, at 13°41'W, should be included.

Using UTC+01:00

In Africa:

  • Southwestern part of Morocco, including Casablanca
  • Most part in Moroccan Sahara (excluding parts occupied by Sahrawi Arab Democratic Republic which use UTC+00:00)

In Europe:

  • Parts of Galicia, Extremadura and Andalucia, Spain
  • Jan Mayen, Norway

References

<!-- For the attention of subsequent editors; the stub tag of this article has been removed as it is not necessary. The different time zones have no suitable category, contain enough information, and are really just linked redirection pages. -->