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  2. List of time zone abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_time_zone...

    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 ...

  3. Date-time group - Wikipedia

    en.wikipedia.org/wiki/Date-time_group

    In communications messages, a date-time group (DTG) is a set of characters, usually in a prescribed format, used to express the year, the month, the day of the month, the hour of the day, the minute of the hour, and the time zone, if different from Coordinated Universal Time (UTC).

  4. List of tz database time zones - Wikipedia

    en.wikipedia.org/wiki/List_of_tz_database_time_zones

    +10:30 +11:00 +1030 +11 backward Link to Australia/Lord_Howe: AU: Australia/Lindeman: Queensland (Whitsunday Islands) Canonical +10:00 +10:00: AEST: australasia AU: Australia/Lord_Howe: Lord Howe Island Canonical +10:30 +11:00 +1030 +11 australasia This is the only time zone in the world that uses 30-minute DST transitions. AU: Australia ...

  5. Time zone - Wikipedia

    en.wikipedia.org/wiki/Time_zone

    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.

  6. ISO 8601 - Wikipedia

    en.wikipedia.org/wiki/ISO_8601

    ISO 8601-1:2019 allows the T to be omitted in the extended format, as in "13:47:30", but only allows the T to be omitted in the basic format when there is no risk of confusion with date expressions. Either the seconds, or the minutes and seconds, may be omitted from the basic or extended time formats for greater brevity but decreased precision ...

  7. List of date formats by country - Wikipedia

    en.wikipedia.org/wiki/List_of_date_formats_by...

    National standard format is yyyy-mm-dd. [161] dd.mm.yyyy format is used in some places where it is required by EU regulations, for example for best-before dates on food [162] and on driver's licenses. d/m format is used casually, when the year is obvious from the context, and for date ranges, e.g. 28-31/8 for 28–31 August. The textual format ...

  8. List of UTC offsets - Wikipedia

    en.wikipedia.org/wiki/List_of_UTC_offsets

    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).

  9. Time in India - Wikipedia

    en.wikipedia.org/wiki/Time_in_India

    After independence in 1947, the Indian government established IST as the official time for the whole country, although Mumbai and Kolkata retained their own local time for a few more years. [8] In 2014 Assamese politicians proposed following a daylight-saving schedule that would be ahead of IST by an hour, but as of March 2020 it has not been ...