20.wikipedia.org launches to commemorate Wikipedia's birthday, look back at the past 20 years, and meet the humans behind the platform.

This article was originally published by the Wikimedia Foundation on January 14, 2021 to mark Wikipedia's 20th birthday, at Wikimedia Foundation News. It is licensed CC-BY SA 3.0.

Wikipedia, the world's largest free online encyclopedia, turned 20 years old on 15 January. This birthday commemorates two decades of global efforts to support free knowledge, open collaboration, and trust on the internet. In a time when disinformation and polarization challenge our trust in information and institutions, Wikipedia is more relevant than ever. Wikipedia celebrates its past and looks ahead to how it will meet the challenges of tomorrow to grow into a more resilient, equitable knowledge resource.

"Wikipedia has evolved from a seemingly impossible idea into a sprawling testament to humanity—a place where we can collaborate, share, and learn about anything and everything," said Katherine Maher, CEO of the Wikimedia Foundation. "It is a global effort of volunteers who elevate knowledge and cooperation over conflict and self-interest. We are committed to preserving the integrity and value of information at a time when the world needs it most."

Today, Wikipedia's more than 55 million articles can be accessed in over 300 languages, for free, and without advertisements, all created by volunteers. During the COVID-19 pandemic, Wikipedia saw record-breaking increases in daily traffic with a growing community of medical professionals contributing knowledge about COVID-19 to the platform. Studies have shown that Wikipedia is one of the most-viewed sources for health information, and its role in providing trusted access to information about COVID-19 in the pandemic led to a milestone collaboration with the World Health Organization in October 2020.

"In a world where information is increasingly commoditized, Wikipedia's model has always been based on the belief that knowledge belongs to all humans," said Wikipedia founder Jimmy Wales. "Wikipedia forces us to step outside of our echo chambers and contend with what a shared understanding of the world could really look like. After all, a Wikipedia article is the same no matter who or where you are in the world, and if something isn't right in the article, you can change it."

Wikipedia aspires to reflect the sum of all human knowledge. As it celebrates 20 years and looks to the future, the people who contribute to Wikipedia also acknowledge that there are deep knowledge gaps that must be addressed. Initiatives such as WikiProject Women in Red, WikiGap, and AfroCROWD, among many others, aim to ensure that Wikipedia more fully represents the diversity of the world. The Wikimedia movement's 2030 strategic direction also reflects this commitment. In addition, the Foundation recently developed a $4.5 million Equity Fund that will offer grants to advance more equitable, inclusive representation in Wikimedia projects, including Wikipedia.

The Wikimedia Foundation and Wikipedia's volunteer communities are actively evolving to face the challenges of our time, including by:

• Investing in the overall health and diversity of volunteer communities to be more inclusive and globally representative
• Developing tools and programs to expand the quantity and diversity of Wikipedia content
• Modernizing Wikipedia's technology to meet the needs of the future
• Advocating for policies that preserve user privacy, free expression, and the free exchange of knowledge online
• Enhancing volunteers' ability to combat disinformation with better resources and insights

The Wikimedia Foundation held a virtual event, hosted by Katherine Maher, Wikimedia Foundation CEO, and Wikipedia founder Jimmy Wales, to showcase the contributions of Wikipedia's global volunteer communities. The event kicked-off a year-long celebration themed "20 Years Human," a nod to the humans who make Wikipedia possible—including regular contributors, donors, and readers. Viewers can tune in via the livestream link.

To learn more about Wikipedia's growth over the last two decades visit 20.wikipedia.org.

To attend Wikipedia virtual celebrations hosted by volunteers around the world, please visit the events page.

Share your favorite Wikipedia story on social media using #Wikipedia20, and tag @Wikipedia in your posts.

To make a donation and continue to sustain Wikipedia's future, visit donate.wikimedia.org.

• Wikipedia has more than 55 million articles across over 300 languages.
• Wikipedia is edited by more than 280,000 volunteer editors every month around the world.
• Wikipedia is edited 350 times per minute and read more than 8000 times a second.
• Wikipedia is accessed by 1.5 billion unique devices every month and read more than 15 billion times every month.
• Roughly 89% of articles on Wikipedia are in languages other than English.
• Most vandalism (edits that do not meet Wikipedia's reliability and neutrality standards) is addressed within five minutes on Wikipedia.
• Wikipedia is supported by nearly 7 million donors, with the average donation being about $15 USD.

Wikipedia is the world's free knowledge resource. It is a collaborative creation that has been added to and edited by millions of people from around the globe since it was created in 2001: everyone can edit it, at any time. Wikipedia is offered in more than 300 languages containing a total of more than 55 million articles. It is the largest, collaborative collection of free knowledge in human history, and today its content is contributed and edited by a community of more than 280,000 volunteer editors each month.

The Wikimedia Foundation is the nonprofit organization that operates Wikipedia and the other Wikimedia free knowledge projects. Our vision is a world in which every single human can freely share in the sum of all knowledge. We believe that everyone has the potential to contribute something to our shared knowledge, and that everyone should be able to access that knowledge freely. We host Wikipedia and the Wikimedia projects, build software experiences for reading, contributing, and sharing Wikimedia content, support the volunteer communities and partners who make Wikimedia possible, and advocate for policies that enable Wikimedia and free knowledge to thrive.

The Wikimedia Foundation is a charitable, not-for-profit organization that relies on donations. We receive donations from millions of individuals around the world, with an average donation of about $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA.