Home›Infobox holiday fixed day›sinh nhật Wikipedia🌐Tiếng ViệtEnglishDeutschEspañolFrançaisNederlandsPolskiSvenskaTiếng ViệtРусскийالعربيةفارسی한국어中文日本語EntityQ10955171· pop 31sinh nhật WikipediaAlso known as WP:WPDAY, WP:Day, Wikipedia:Wikipedia Daytrang dự án WikimediaKey factsObserved byWikipediansSignificanceCommemoration of the first Wikipedia editDateJanuary 15FrequencyAnnualvia Wikipedia infoboxWikidata factsImageWikiXDC Cupcakes c - Stierch.jpgShow 2 more factsinception2001-01-15Commons categoryWikipedia DaySources (1)wikiconference.orgvia Wikidata · CC0Available in 29 languagesEspañolFrançais中文日本語РусскийAzerbaijaniBanglabe_x_oldChechenCategoriesInfobox holiday fixed day