On This Day
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Wikipedia, the free internet encyclopedia, turns 10 years old

Wikipedia is a free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.

Wikipedia is a free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki. Founded by Jimmy Wales and Larry Sanger in 2001, Wikipedia has been hosted since 2003 by the Wikimedia Foundation, an American nonprofit organization funded mainly by donations from readers. Wikipedia is the largest and most-read reference work in history.

Initially available only in English, Wikipedia exists in over 340 languages and is one of the world's most visited websites.

Historical Significance

Wikipedia is a free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.

Events Before

  1. New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cov

    New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cover from the waist to knee, and women's from shoulder to knee; fabric must be a "textile" or woven material

  2. Earthquake devastates Haiti, killing an estimated 100,000 to 160,000 people and destroying the majority of the capital P

    Earthquake devastates Haiti, killing an estimated 100,000 to 160,000 people and destroying the majority of the capital Port-au-Prince

  3. "Easy Rider" director and actor Dennis Hopper (73) divorces his fifth wife Victoria Duffy due to irreconcilable differen

    "Easy Rider" director and actor Dennis Hopper (73) divorces his fifth wife Victoria Duffy due to irreconcilable differences and out-of-control spending

  4. Infanta Elena, Duchess of Lugo (46) divorces Lord of Tejada, Jaime de Marichalar (46) after 15 years of marriage

    Infanta Elena, Duchess of Lugo (46) divorces Lord of Tejada, Jaime de Marichalar (46) after 15 years of marriage

  5. Alexandre Bilodeau wins the gold medal in the freestyle skiing men's moguls event, becoming the first Canadian to win go

    Alexandre Bilodeau wins the gold medal in the freestyle skiing men's moguls event, becoming the first Canadian to win gold during an Olympic Games hosted in Canada

Events After

  1. Actress Parminder Nagra files for divorce from photographer James Stenson due to irreconcilable differences after 3 year

    Actress Parminder Nagra files for divorce from photographer James Stenson due to irreconcilable differences after 3 years of marriage

  2. American actor Dick Van Dyke (86) weds second wife, American make-up artist Arlene Silver (40) in Malibu, California

    American actor Dick Van Dyke (86) weds second wife, American make-up artist Arlene Silver (40) in Malibu, California

  3. "Twilight" actor Peter Facinelli (38) divorces "Beverly Hills 90210" actress Jennie Garth (39) due to irreconcilable dif

    "Twilight" actor Peter Facinelli (38) divorces "Beverly Hills 90210" actress Jennie Garth (39) due to irreconcilable differences after 11 years of marriage

  4. Actress and model Heidi Klum (39) divorces British soul and R&B singer-songwriter Seal (49) due to irreconcilable differ

    Actress and model Heidi Klum (39) divorces British soul and R&B singer-songwriter Seal (49) due to irreconcilable differences after almost seven years of marriage

  5. "The Lion King" becomes highest grossing Broadway show, overtaking "The Phantom of the Opera"

    "The Lion King" becomes highest grossing Broadway show, overtaking "The Phantom of the Opera"

More from the 2010s

New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cov

New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cover from the waist to knee, and women's from shoulder to knee; fabric must be a "textile" or woven material

10 people are killed, and 120 are injured in a stampede in Luanda, Angola

10 people are killed, and 120 are injured in a stampede in Luanda, Angola

Dutchman Michael van Gerwen wins his first PDC World Darts Championship, defeating Peter Wright of Scotland 7-4; it is t

Dutchman Michael van Gerwen wins his first PDC World Darts Championship, defeating Peter Wright of Scotland 7-4; it is the first time no Englishman has been in the final

Lithuania adopts the euro as its currency, replacing the Litas and becoming the 19th member of the Eurozone

Lithuania adopts the euro as its currency, replacing the Litas and becoming the 19th member of the Eurozone

Frequently Asked Questions

What happened on January 15, 2011?
Wikipedia is a free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki. Founded by Jimmy Wales and Larry Sanger in 2001, Wikipedia has been hosted since 2003 by the Wikimedia Foundation, an American nonprofit organization funded mainly by donations from readers. Wikipedia is the largest and most-read reference work in history.
Why is Wikipedia, the free internet encyclopedia, turns 10 years old significant?
Wikipedia is a free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.

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January 15 in HistoryYear 2011