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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]
The ISO 8601 format YYYY-MM-DD (2024-12-12) is intended to harmonize these formats and ensure accuracy in all situations. Many countries have adopted it as their sole official date format, though even in these areas writers may adopt abbreviated formats that are no longer recommended.
In 1995 this was changed to the colon in the interest of compatibility with ISO 8601. The traditional representation with a dot remains in widespread use, however, and in this format leading zeros are generally omitted from the hours; additionally, the literal string "Uhr" is frequently added – e.g. 6.30 Uhr.
ISO 8601 is an international standard for communicating certain information, in particular between computer systems. The information comprises certain units of time which would normally be called "dates and times" from millennia (and with extensions larger units) down to seconds and decimal fractions thereof (for example 12:34 on 10 April 1962), and other time-like entities which we need not ...
Speaking the "day month year" format is much less common, with the exception of holidays such as the Fourth of July. The year-month-day order, such as the ISO 8601 "YYYY-MM-DD" notation is popular in computer applications because it reduces the amount of code needed to resolve and compute dates.
One of the advantages of using the ISO 8601 date format is that the lexicographical order (ASCIIbetical) of the representations is equivalent to the chronological order of the dates, assuming that all dates are in the same time zone. Thus dates can be sorted using simple string comparison algorithms, and indeed by any left to right collation ...
The little-endian format (day, month, year; 1 June 2022) is the most popular format worldwide, followed by the big-endian format (year, month, day; 2006 June 1). Dates may be written partly in Roman numerals (i.e. the month) [citation needed] or written out partly or completely in words in the local language.
Date and time notation around the world varies.. An approach to harmonise the different notations is the ISO 8601 standard.. Since the Internet is a main enabler of communication between people with different date notation backgrounds, and software is used to facilitate the communication, RFC standards and a W3C tips and discussion paper were published.