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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]
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 ...
(Australian) Central Daylight Saving Time (ACDT or CDST) – UTC+10:30, in South Australia and Broken Hill, New South Wales (Australian) Eastern Daylight Saving Time (AEDT or EDST) – UTC+11:00, in New South Wales, the ACT, Victoria, and Tasmania; During the usual periods of DST, the three standard time zones in Australia become five zones.
While a mean time was proposed as early as 1835, the first law relating to a standardised time zone was the Telegraph Act of 1852, which stipulated that the national telegraph service adjust the clocks in its offices to "the central time of Amsterdam", which would later become known as "Amsterdam Time" (Dutch: Amsterdamse Tijd ) the mean time ...
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The shift is the amount of time added at the DST start time and subtracted at the DST end time. For example, in Canada and the United States, when DST starts, the local time changes from 02:00 to 03:00, and when DST ends, the local time changes from 02:00 to 01:00. As the time change depends on the time zone, it does not occur simultaneously in ...
The date and time in Australia are most commonly recorded using the day–month–year format (8 February 2025) and the 12-hour clock (1:58 am), although 24-hour time is used in some cases. For example, some public transport operators such as V/Line [1] and Transport NSW [2] use 24-hour time, although others use 12-hour time instead.
However, Australian maritime unions did much to frustrate this, with bans on manning/loading/coaling from September 1946 to a final ending of all bans in July 1949. [ 6 ] Historically, diplomatic issues have arisen over West New Guinea , [ 7 ] and Indonesia 's independence from the Netherlands (with Australia recognising the Indonesian Republic ...