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UTC does not change with a change of seasons, but local time or civil time may change if a time zone jurisdiction observes daylight saving time (summer time). For example, local time on the east coast of the United States is five hours behind UTC during winter, [23] but four hours behind while daylight saving is observed there. [24]
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:
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.
The use of local time for time-stamping records is not recommended for time zones that implement daylight saving time because once a year there is a one-hour period when local times are ambiguous. Calendar systems nowadays usually tie their time stamps to UTC, and show them differently on computers that are in different time zones.
Xinjiang Time Canonical +06:00 +06:00 +06 asia The Asia/Urumqi entry in the tz database reflected the use of Xinjiang Time by part of the local population. Consider using Asia/Shanghai for Beijing Time if that is preferred. RU: Asia/Ust-Nera: MSK+07 - Oymyakonsky Canonical +10:00 +10:00 +10 europe LA: Asia/Vientiane: Link † +07:00 +07:00 +07 ...
France, including its overseas territories, has the most time zones with 12 (13 including its claim in Antarctica and all other counties ). Many countries have daylight saving time, one added hour during the local summer, but this list does not include that information. The UTC offset in the list is not valid in practice during daylight saving ...
UTC is calculated by the International Bureau of Weights and Measures (BIPM) [2] using weighted averages of the various times as reported by these 70+ listed timing centers. [ 3 ] [ 4 ] BIPM lists the time differences between the UTC timing centers in a monthly publication called Circular T, which contains the most up to date list of ...
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 ...