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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.
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 ...
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.
South Vietnam time zone was changed to UTC+08:00 from 23:00, 31 December 1959, passing 60 minutes. North Vietnam confirmed official UTC+07:00 from 1 January 1968. Following the Fall of Saigon in April–May 1975, reunified Vietnam then observes UTC+07:00 with Saigon (and other southern parts) delaying 60 minutes on 13 June 1975.
The Pacific Time Zone (PT) is a time zone encompassing parts of western Canada, the western United States, and western Mexico. Places in this zone observe standard time by subtracting eight hours from Coordinated Universal Time (UTC−08:00).
Operators of the new railroad lines needed a new time plan that would offer a uniform train schedule for departures and arrivals. Four standard time zones for the continental United States were introduced at noon on November 18, 1883, in Chicago, IL , when the telegraph lines transmitted time signals to all major cities.
Date and time notation in Vietnam; Full date: 7 tháng 2 năm 2025: All-numeric date: 07/02/2025 07-02-2025 ... 00 to 14:59 12 giờ trưa: Chiều (Afternoon)