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 | This page in a nutshell: Dates (individual days of a given month of a four digit year, and four digit years) may be formatted in the same way as they would under ISO 8601, but Wikipedia does not claim that they follow ISO 8601 |
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 concern ourselves with here.
For purposes of style the English Wikipedia permits a number of representations of dates which are, or are partially, consistent with the representations of ISO 8601 - however these are not to be considered ISO 8601 dates, although by happy accident they may be consistent in other respects, there is no guarantee, or even attempt to make sure they are.