TheDanish Realm, including its dependencies of theFaroe Islands andGreenland, and metropolitanDenmark, uses sixtime zones.

UTC+01:00 as standard time, andUTC+02:00 as daylight saving time, with transition datesaccording to the European Union rules.

• All ofDenmark proper.^[2]
  • IncludingCopenhagen,Aarhus andRønne (Bornholm)

TheUTC+01:00 centerline (15°E) goes through Bornholm, approximately 2 kilometers fromGudhjem, in the far eastern Denmark, while Copenhagen at 12°34′E corresponds to UTC+0:50, and the west coast at 8°6′E corresponds to UTC+0:32.

An 1893 law set thede jure standard time of Denmark as the mean solar time 15°E of Greenwich, for all of Denmark, with an exception for the Faroe Islands, effective at 1 January 1894.^[3] This linked the standard time in Denmark toEarth's rotation, and clocks in Denmark were considered to be atnoon, when the sun is directly above the 15° Eastern meridian. As Earth's rotation is not completely regular, the time could be offset by up to 0.9 seconds in either direction, compared to UTC+1, requiring a leap second to be added to remedy the issue. On 14 March 2023, theFolketing adopted a proposal to set the de jure standard time of Denmark as UTC+1, with exceptions made for Greenland and the Faroe Islands. The proposal became effective law on 26 March 2023 at 2:00, superseding the 1893 law.^[4][5]

UTC+00:00 as standard time, andUTC+01:00 as daylight saving time.

• TheFaroe Islands^[2]

The island ofMykines is actually located at 7°36′W longitude and thus atUTC−00:31 (closer toUTC−01:00 than UTC), however Mykines uses the same time zone as the rest of the Faroe Islands.

UTC+00:00 year around, nodaylight saving time

• The northeast coast ofGreenland. There are a few settlements, like the weather stationDanmarkshavn, otherwise unpopulated.^[2]

The area uses same time as Iceland (WET), since it is generally supplied from Iceland.

UTC−02:00 as standard time, andUTC−01:00 as daylight saving time.

• All the west coast ofGreenland
  • IncludingQaanaaq,^[6]Ilulissat,^[7]Kangerlussuaq,Nuuk andQaqortoq
• Tasiilaq,Kulusuk,Ittoqqortoormiit,^[2]Neerlerit Inaat and surrounding area on the east coast^[8] Prior to October 29, 2023, the area was on the East Greenland Time.^[9]
• ExceptPituffik Space Base

UTC−04:00 as standard time, andUTC−03:00 asdaylight saving time, with transition datesaccording to the United States rules.

• Pituffik Space Base^[2]

All of Greenland usesDaylight Saving Time, except for the northeast coast. The transition dates areaccording to the European Union rules, except for the Pituffik Space Base, which usesUnited States transition dates and for which the following description does not apply.

DST starts at 01:00UTC on the last Sunday in March and ends same time on the last Sunday in October each year in all affected areas.

That means that in Denmark proper, the transition is at 02:00 Local Standard Time (03:00 Daylight Saving Time) and in theFaroe Islands one hour earlier. In most of Greenland, the transition takes place at 23:00 Local Standard Time on the day before (00:00 Daylight Saving Time).

The first time a common time was used in Denmark, was in 1890, when Copenhagen local time was used as railway time. This was GMT+0:50:20 from Greenwich. In 1890 this time was introduced as a standard time for Denmark. In 1893, Denmark adopted the "Act on the Determination of Time", to connect to the international time zones, using Greenwich plus one hour, which set the standard time in Denmark asnoon when the sun is directly above 15°E, starting from 1 January 1894.^[10] This is the local time of easternBornholm, leaving 99.5% of the country west of the time meridian (15°E), which has triggered some sarcastic comments (changing from Copenhagen time toGudhjem time). However all of the country is located east of Greenwich+00:30 (7.5°E).

Daylight saving time was used in the years 1916, 1940, 1945-1948 and is currently in use since 1980.^[2]

The Faroe Islands introduced Greenwich Mean Time in 1908, and Iceland (then a Danish area) introduced GMT-01:00 at the same time (changed to GMT, permanent daylight saving time, in 1968). West Greenland introduced GMT-03:00 in 1916. Daylight saving time was introduced in the Faroe Islands in 1981.^[2]

On 25 January 2023, Transport Minister,Thomas Danielsen made a proposal to overrule the 1893 law, with an act to set Danish standard time as UTC+1, with exceptions for Greenland and the Faroe Islands.^[4][5]On 14 March 2023, theFolketing adopted the proposal with unanimous consent, and the proposal came in effect as law on 26 March 2023, at 2:00.^[4][5] Greenland moved the time zone forward one hour simultaneously (on 25 March 2023 local time), after that usingUTC−02:00 as the standard time.^[11]

Data for Denmark directly fromzone.tab of theIANA time zone database. Columns marked with * are the columns from zone.tab itself.

c.c.*	Coordinates*	TZ*	Comments*	UTC offset	UTC DST offset	Map
DE	+5230+01322	Europe/Berlin	most of Germany	+01:00	+02:00
DK	+5540+01235	Europe/Copenhagen		+01:00	+02:00	Redirects to Europe/Berlin.
FO	+6201−00646	Atlantic/Faroe		+00:00	+01:00
GL	+7646−01840	America/Danmarkshavn	National Park (east coast)	+00:00	+00:00
GL	+7029−02158	America/Scoresbysund	Scoresbysund/Ittoqqortoormiit	−02:00	−01:00
GL	+6411−05144	America/Nuuk	most of Greenland	−02:00	−01:00
GL		America/Godthab		−02:00	−01:00	Redirects to America/Nuuk.
GL	+7634−06847	America/Thule	Thule/Pituffik	−04:00	−03:00

• Time in Denmark
• Danish Realm

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