This page is a chronology of events in year 2004 directly related to Wikipedia and Wikipedians, both within Wikipedia and in the whole wide world. Wikimedia events and events in sister projects (Wiktionary, Wikibooks, etc.) are listed as long as they are related to Wikipedia.
Additions to this page must follow certain rules, because it is hoped that in 50 years or so this page will become a valuable source of scholar research.
- January 2004, Wikipedia passed the 200,000 article milestone in English and reached 450,000 articles for both English and non-English wikis.
- January 30, the first article was written in Ukrainian Wikipedia
- February 25, Wikipedia reaches 500,000 articles in 50 languages.
- April 20, the article count of the English wiki reached 250,000.
- May 12, Wikipedia wins the Annual Webby Award in the "Community" category.
- June 2, the first blocking of Wikipedia in mainland China.
- July 7, the article count of the English wiki reached 300,000
- June 23, Wikipedia won a Golden Nica for Digital Communities of the annual Prix Ars Electronica contest, see m:Golden Nica Awards 2004
- September 9, Guillaume Blanchard, known as Aoineko (see his user pages in the Japanese and French Wikipedias) was awarded the Web Creation Award as the founder of the Japanese Wikipedia by the Japan Advertisers Association.
- September 20, Wikipedia reached one million articles  in over 105 languages
- November 2, winners of the 1st Danny's contest (Best New Article) announced.
- November 20, the article count of the English wiki reached 400,000.
- November 28, first article in Yiddish Wikipedia
- January 26, Tim Starling introduces the concept of barnstar-free zone.
- February 22, The first Did You Know posted: "Pencil sharpener" (created by user:Raul654 on February 15, 2004)
- May 14 The first Picture of The Day
- May 30, Categorization scheme was introduced in Wikipedia.
- June 11, Wikistress gauge created, suggested by Raul654
- July 23, the WikiProject "Military history" recognized the deficiency of "Newpages" for tracking new articles and created the first "manually operated" list of new articles by topic, Military history/New articles, — followed by many.
- January 2004
- February 4: Wikipedia:Association of Members' Advocates created; discontinued in 2007
- February 18
- March 2004, Yiddish Wikipedia founded
- May 27, Aromanian Wikipedia (Aromanian (Armâneashti)) created
- June 2004 Klingon language wikipedia (tlhIngan Hol) created, later dissolved.[when?]
- July 31, Nynorsk-specific Norwegian Wikipedia version (nn: ) launched
- August 2004:
- August 12, Belarusian Wikipedia created
- October 4, Anglo-Saxon Wikipedia (Englisc) created
- October 7, 21:44, Wikipedia:Wikifun, then known as "Wikihunt" started, with question "Find out the three countries involved in the Battle of Bunei". (As of 00:40, 31 March 2006 (UTC), the word "wikihunt" still sits in 11 google hits.
- October 27: Wikipedia:Department of Fun established
- December 2004, Azerbaijani Wikipedia (Azerbaijani (Azərbaycan) آذربایجان) created
- January 3: User:Lysy (22:33) (first edit on en-wiki)
- February 13: User:Everyking (04:16) (user page created)
- 2004-02-20: User:Jdavidb (23:07:51) (first registered edit, user page created)
- March 3: User:BillyH (17:43) (first logged in edit)
- July 21: User:Dbachmann (10:44) (first logged in edit)
- August 20: User:Paul August(02:34 first edit, user page created)
- August 21: User:Willy on wheels (00:43)(first logged-in edit)
- October 14: User:Grutness (03:20) (user page created)
- December 7: User:Ghirlandajo (07:03) (first logged-in edit)
- While formally Wikipedia:Verifiability and others of Wikipedia's content-controlling policies do not apply outside the main namespace, they must be strictly followed here, for the sake of scholarly discipline:
- The listed event and its date must be mentioned in a wikilinked or externally linked reference. It is advised to consider an external link to a specific version of a Wikipedia page rather than a wikilink, if this page is linked for a critical but volatile piece of information.
- Credible sources must be used only. Within Wikipedia, Wikipedia Signpost is one of them.
- Trivial events must be avoided:
- "Webby Awards 2004"