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ISO 8601

International standards for dates and times
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Summary

ISO 8601 is an ISO standard[1]. It ranks in the top 2% of iso standard entities by monthly Wikipedia readership (35,413 views/month).[2]

Key Facts

  • Based on: Gregorian calendar[3]
  • Has use: year[4], month[5], day[6]
  • Commons category: ISO 8601[7]
  • Determination method or standard: writing[8]
  • Has part(s): ISO 8601 basic format[9]
  • Has edition or translation: ISO 8601:2004: Data elements and interchange formats—Information interchange—Representation of dates and times[10], ISO 8601:1988: Data elements and interchange formats—Information interchange—Representation of dates and times[11], ISO 8601:2000: Data elements and interchange formats—Information interchange—Representation of dates and times[12]
  • Main subject: date and time notation[13]
  • Replaces: ISO 3307[14], ISO 2014[15]
  • Uses: zero-based numbering[16]
  • Implementation of: International Organization for Standardization[17]
  • International Classification for Standards: 01.140.30[18]

Why It Matters

ISO 8601 has Wikipedia articles in 27 language editions, a strong signal of global cultural recognition.[19] It is known by 8 alternative names across languages and contexts.[20]

Related Entities

Suriname

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [19] ↑ . Wikidata sitelinks. wikidata.org.
  3. [20] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). ISO 8601. Retrieved October 16, 2026, from https://4ort.xyz/entity/iso-8601
MLA “ISO 8601.” 4ort.xyz Knowledge Graph, 4ort.xyz, 16 Oct. 2026, https://4ort.xyz/entity/iso-8601.
BibTeX @misc{4ortxyz_iso-8601_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{ISO 8601}}, year = {2026}, url = {https://4ort.xyz/entity/iso-8601}, note = {Accessed: 2026-10-16}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): ISO 8601 — https://4ort.xyz/entity/iso-8601 (retrieved 2026-10-16)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 5d ago · عُثمان · 2026-10-13 view diff on Wikidata ↗
    Isocat id → 5197
    Sitelink count → 52
    Wikipedia languages → ['af', 'ar', 'bg', 'bn', 'br', 'ca', 'commons', 'cs', 'da', 'de', 'en', 'eo', 'e
    International classification for standards → 01.140.30
    + 3 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ Isocat id: 5197, Matched to [[:toollabs:mix-n-match/#/entry/7330227|ISO8601 (#7330227)]] in [[:toollabs:mix-n-match/#/catalog/125|ISOCAT]] #mix'n'match"
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