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October 21, 2015

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Summary

October 21, 2015 is an October 21[1]. It is known by 24 alternative names across languages and contexts.[2]

Key Facts

  • October 21, 2015's instance of is recorded as October 21[3].
  • October 21, 2015's instance of is recorded as calendar day of a given year[4].
  • October 21, 2015 is part of October 2015[5].
  • October 21, 2015's Commons category is recorded as 2015-10-21[6].
  • October 21, 2015 took place on October 21, 2015[7].
  • October 21, 2015's topic's main category is recorded as Category:October 21, 2015[8].
  • October 21, 2015's day of week is recorded as Wednesday[9].

Body

Definition and Type

Recorded instance of include October 21[3] and calendar day of a given year[4].

Use and Application

October 21, 2015 is part of October 2015[5].

Why It Matters

October 21, 2015 is known by 24 alternative names across languages and contexts.[2]

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.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . 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). October 21, 2015. Retrieved May 3, 2026, from https://4ort.xyz/entity/october-21-2015
MLA “October 21, 2015.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/october-21-2015.
BibTeX @misc{4ortxyz_october-21-2015_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{October 21, 2015}}, year = {2026}, url = {https://4ort.xyz/entity/october-21-2015}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): October 21, 2015 — https://4ort.xyz/entity/october-21-2015 (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/october-21-2015 · Last refreshed:

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. 5w ago · Rose Abrams · 2026-09-06 view diff on Wikidata ↗
    Instance of → October 21, calendar day of a given year
    Part of → —
    Day of week → Wednesday
    Point in time → —
    + 6 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ Know your meme numeric id: 12859, Matched to [[:toollabs:mix-n-match/#/entry/74367167|Back to the Future Day (#74367167)]] in [[:toollabs:mix-n-match/#/catalog/2417|Know Y"
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