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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.
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 ...
Example 1: 051100Z represents the 5th day of the current month 11:00 (UTC). Example 2: 091630Tjul11 represents 9 July 2011 4:30 pm (MST). Example 3: 04084106ZFeb25 represents the current time of refresh: (Feb) 04 08:41:06, Feb 2025 (UTC).
East Tennessee, except Bledsoe, Cumberland, and Marion Counties: UTC−05:00 EST Eastern Standard Time UTC−06:00 CT Most of state: UTC−06:00 CST Central Standard Time Texas: UTC−06:00 CT Yes Most of state: UTC−06:00 CST Central Standard Time UTC−07:00 MT El Paso and Hudspeth counties: UTC−07:00 MST Mountain Standard Time U.S. Minor ...
UTC is, within about 1 second, mean solar time at 0°. [6] UTC does not observe daylight saving time. For most purposes, UTC is considered interchangeable with GMT, but GMT is no longer precisely defined by the scientific community. UTC is one of several closely related successors to GMT.
In these cases, exact and unambiguous communication of time is critical. If someone mistakes 5:00 AM for 5:00 PM in a hospital for example, when medication or other medical treatment is needed at a certain time, the outcome could be dire. Thus 24-hour time (5:00 PM written as 17:00) is used.
In this case, instead of giving a time zone, an offset (e.g. −3, 1, 5, etc.) can also be given to get the current hour of UTC+offset time (which will not be adjusted according to DST); dst is an optional parameter to disable automatic daylight saving time adjustment by setting the value to "no";
UTC−05:00 is an identifier for a time offset from UTC of −05:00. In North America, it is observed in the Eastern Time Zone during standard time , and in the Central Time Zone during the other eight months (see Daylight saving time ).