# Wikipedia founding date

entity: /record/wikipedia.md  
predicate: founded  
page: /record/wikipedia/founded  
as_of: 2026-11-01  

As of November 1, 2026, Wikipedia's founding date on the AsOf record is January 15, 2001, dated January 15, 2001, from 2 secondary sources (washingtonpost.com and lapl.org). The record holds 1 claim on Wikipedia's founding date, 1 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.

## Current founding date

What the record asserts on 2026-11-01.

- [Wikipedia](/record/wikipedia.md) | founded | 2001-01-15 | valid 2001-01-15 to present | conf 0.85 | valid | [clm_95D3B81A8C9E](/claim/clm_95D3B81A8C9E.md)
  sources: https://www.wikidata.org/wiki/Q52, https://www.washingtonpost.com/news/the-intersect/wp/2016/01/15/wikipedia-just-turned-15-years-old-will-it-survive-15-more/, https://www.lapl.org/collections-resources/blogs/lapl/wikipedia-20-aka-wiki-wiki-birthday

## Every dated value

One claim per line, oldest first. Superseded claims stay visible.

- [Wikipedia](/record/wikipedia.md) | founded | 2001-01-15 | valid 2001-01-15 to present | conf 0.85 | valid | [clm_95D3B81A8C9E](/claim/clm_95D3B81A8C9E.md)
  sources: https://www.wikidata.org/wiki/Q52, https://www.washingtonpost.com/news/the-intersect/wp/2016/01/15/wikipedia-just-turned-15-years-old-will-it-survive-15-more/, https://www.lapl.org/collections-resources/blogs/lapl/wikipedia-20-aka-wiki-wiki-birthday

## Questions this record answers

### What is Wikipedia's current founding date?

January 15, 2001, dated January 15, 2001, from 2 secondary sources (washingtonpost.com and lapl.org). The record asserts this claim as of November 1, 2026 (status valid, confidence 0.85).


## Get this data

- JSON: /v1/entities/wikipedia/founded (this fact) · /v1/entities/wikipedia?predicates=founded (with the entity's coverage; add as_of=YYYY-MM-DD for a date)
- MCP: timeline(entity: "wikipedia", predicates: ["founded"]) for every dated value · fetch(id: "/record/wikipedia/founded.md") for this page
- Entity twin: /record/wikipedia.md · timeline: /timelines/wikipedia.md

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.