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The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2025a of the tz database. [2]
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.
Most of state: UTC−06:00 CST Central Standard Time UTC−07:00 MT Greeley, Hamilton, Sherman and Wallace counties: UTC−07:00 MST Mountain Standard Time Kentucky: UTC−05:00 ET Yes Eastern 60% of state: UTC−05:00 EST Eastern Standard Time UTC−06:00 CT Western 40% of state: UTC−06:00 CST Central Standard Time Louisiana: UTC−06:00 CT ...
Before the adoption of four standard time zones for the continental United States, many towns and cities set their clocks to noon when the sun passed their local meridian, pre-corrected for the equation of time on the date of observation, to form local mean solar time. Noon occurred at different times but time differences between distant ...
This is a list representing time zones by country. Countries are ranked by total number of time zones on their territory. Time zones of a country include that of dependent territories (except Antarctic claims). France, including its overseas territories, has the most time zones with 12 (13 including its claim in Antarctica and all other counties).
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.
Hence only the unified Germany is listed. [1] The zone Europe/Busingen was created in the 2013a release of the tz database, [2] because since the Unix time epoch in 1970, Büsingen has shared clocks with Zurich. [3] Büsingen did not observe DST in 1980 like the rest of West Germany, but did so from 1981 after Switzerland adopted DST.
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 ...