Wikipedia Day

What Is Wikipedia Day?

January 15th is "Wikipedia Day." On this date in 2001, Wikipedia, the world's largest online encyclopedia, officially launched. Its revolutionary model—allowing anyone to contribute edits—transformed how knowledge is shared on the internet, and this day commemorates that milestone.

How Wikipedia Began

Wikipedia was founded by Jimmy Wales and Larry Sanger. It originally began as a supplementary project to Nupedia, an encyclopedia written by experts, but its open, easy-to-edit format allowed it to grow rapidly—eventually overtaking its parent project entirely.

What Is a Wiki?

The word "wiki" comes from the Hawaiian word for "quick." It refers to a system that lets anyone easily edit web pages directly in a browser—the core technology behind Wikipedia. This system made it possible for people around the world to pool their knowledge together.

An Astonishing Scale

Wikipedia now exists in more than 300 languages, with over 60 million articles published across all editions combined. Continually updated by volunteer editors, it has grown into the most comprehensive encyclopedia in human history.

The Japanese-Language Wikipedia

The Japanese-language edition of Wikipedia launched in May 2001 and now contains more than 1.4 million articles. It is the largest Japanese-language encyclopedia in existence, receiving hundreds of millions of views per month.

What Makes Wikipedia Unique

• Anyone can read and edit it for free
• It carries no advertising and is funded by donations
• It aims for a neutral point of view in all articles
• Citations are required to maintain reliability
• It is run by the nonprofit Wikimedia Foundation

Achievements and Challenges

Wikipedia has democratized access to knowledge and become a symbol of information-sharing in the internet age. At the same time, because anyone can edit it, there is a risk of misinformation or biased content.

Efforts to Improve Reliability

Wikipedia relies on mutual checking among editors, mandatory citations, and measures against vandalism to maintain quality. It isn't perfect, but ongoing efforts continue to improve it.

How to Use Wikipedia Wisely

• Use it as a starting point for research, then verify details with primary sources
• Get into the habit of cross-checking information across multiple sources
• Follow the citations and references listed at the end of an article
• If you spot an error, consider helping fix it yourself

The Idea of Shared Knowledge

Wikipedia Day is a reminder that knowledge isn't meant to be hoarded—it becomes more valuable when shared. This project, where volunteers around the world freely contribute knowledge, embodies the potential of the internet and the power of human cooperation.