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This is a list of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00). It includes countries and regions that observe them during standard time or year-round.
This is an accepted version of this page This is the latest accepted revision, reviewed on 4 February 2025. Primary time standard "UTC" redirects here. For the time zone between UTC−1 and UTC+1, see UTC+00:00. For other uses, see UTC (disambiguation). It has been suggested that UTC offset be merged into this article. (Discuss) Proposed since December 2024. Current time zones Coordinated ...
Greenwich Mean Time (GMT) is the local mean time at the Royal Observatory in Greenwich, London, counted from midnight. At different times in the past, it has been calculated in different ways, including being calculated from noon ; [ 1 ] as a consequence, it cannot be used to specify a particular time unless a context is given.
Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
UTC+00:00 is an identifier for a time offset from UTC of +00:00. This time zone is the basis of Coordinated Universal Time (UTC) and all other time zones are based on it. In ISO 8601, an example of the associated time would be written as 2069-01-01T12:12:34+00:00. It is also known by the following geographical or historical names: Greenwich ...
Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+08:00), Cuba Standard Time (UTC−05:00), and (North American) Central Standard Time (UTC−06:00), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in ...
Western European Time (WET, UTC+00:00) is a time zone covering parts of western Europe and consists of countries using UTC+00:00 (also known as Greenwich Mean Time, abbreviated GMT). [1] [2] It is one of the three standard time zones in the European Union along with Central European Time and Eastern European Time. [3] [2]
At 18:36:57 UTC on Wednesday, 17 October 1973, the first appearance of the date in ISO 8601 format [b] (1973-10-17) within the digits of Unix time (119731017) took place. At 01:46:40 UTC on Sunday, 9 September 2001, the Unix billennium (Unix time number 1 000 000 000) was celebrated. [40] The name billennium is a portmanteau of billion and ...