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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]
Click the time zone abbreviation to see the article for your time zone. This article title is the value for the third parameter. Alternatively, you can view the article for your country, state, province, territory, or a nearby major city. Time zone information is usually in the article's info box.
The result displays text representing the time interval from date1 to date2 (date2 − date1). Dates are UTC—local times and time zones are not supported. Dates are checked for validity. For example, 29 February 2000 is accepted, but 29 February 1900 is not a valid date. Each date can include an era or a time, and a variety of formats are ...
Each zone line for a zone specifies, for a range of date and time, the offset to UTC for standard time, the name of the set of rules that govern daylight saving time (or a hyphen if standard time always applies), the format for time zone abbreviations, and, for all but the last zone line, the date and time at which the range of date and time ...
If no time zone is given or if the given time zone is not supported, then the output will default to the current hour of UTC+0 time; 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);
an abbreviated format from the "Acceptable date formats" table, provided the day and month elements are in the same order as in dates in the article body; the format expected in the citation style being used (but all-numeric date formats other than yyyy-mm-dd must still be avoided).
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 ...
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data.It is maintained by the International Organization for Standardization (ISO) and was first published in 1988, with updates in 1991, 2000, 2004, and 2019, and an amendment in 2022. [1]