On the Internet, the World Wide Web Consortium (W3C) uses ISO 8601 in defining a profile of the standard that restricts the supported date and time formats to reduce the chance of error and the complexity of software.[1]
RFC 3339 defines a profile of ISO 8601 for the use in Internet protocols and standards. It explicitly excludes durations and dates before the common era. The more complex formats such as week numbers and ordinal days are not permitted.[2]
ISO 8601 is referenced by several specifications, but the full range of options of ISO 8601 is not always used. For example, the various electronic program guide standards for TV, digital radio, etc. use several forms to describe points in time and durations. The ID3 audio meta-data specification also makes use of a subset of ISO 8601.[3]
The ISO 8601 week date, as of 2006, appeared in its basic form on major brand commercial packaging in the United States. Its appearance depended on the particular packaging, canning, or bottling plant more than any particular brand. The format is particularly useful for quality assurance, so that production errors can be readily traced to work weeks, and products can be correctly targeted for recall.
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European Norm: EN 28601:1992
| Australia | AS 3802:1997 |
| Austria | OENORM EN 28601 |
| Belgium | NBN EN 28601 |
| Canada | CSA Z234.5:1989 |
| Czech Republic | CSN ISO 8601 |
| Denmark | DS/ISO 8601:2005 |
| Finland | SFS-EN 28601 |
| France | NF Z69-200; NF EN 28601:1993-06-01 |
| Germany | DIN ISO 8601:2006-09 (replaced DIN EN 28601:1993-02); related: DIN 5008:2011-04 |
| Greece | ELOT EN 28601 |
| Hungary | MSZ ISO 8601:2003 |
| Iceland | IST EN 28601:1992 |
| India | IS 7900:2001 |
| Ireland | IS/EN 28601:1993 |
| Italy | UNI EN 28601 |
| Japan | JIS X 0301-2002 |
| Lithuania | LST ISO 8601:1997 |
| Luxembourg | ITM-EN 28601 |
| México | NOM-008-SCFI-2002 |
| Netherlands | NEN ISO 8601 & NEN EN 28601 & NEN 2772 |
| Norway | NS-ISO 8601 |
| People's Republic of China | GB/T 7408-2005 |
| Poland | PN-90/N-01204 |
| Portugal | NP EN 28601 |
| Russia | ГОСТ ИСО 8601-2001 (current), ГОСТ 7.64-90 (obsolete) |
| South Africa | ARP 010:1989 |
| Spain | UNE EN 28601 |
| Sweden | SS-EN 28601 |
| Switzerland | SN ISO 8601:2005-08 |
| Thailand | TIS 1111:2535 in 1992 |
| UK | BS ISO 8601:2004, BS EN 28601 (1989-06-30) |
| US | ANSI INCITS 30-1997 (R2008) and NIST FIPS PUB 4-2 |
Implementation overview