404 Day – Apr. 4, 2027

404 Day
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Every April 4
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404 Day champions internet freedom and digital rights every April 4. This day, spearheaded by the Electronic Frontier Foundation, highlights the ongoing challenges of censorship and restricted access online. Join the movement to advocate for an open internet, support digital literacy, and protect online privacy for all users.

Want to sponsor 404 Day? Learn how

Expected 404 Day Deals

As a cause-driven observance, 404 Day focuses on advocacy and support rather than commercial deals. Organizations like the Electronic Frontier Foundation (EFF) often run campaigns encouraging donations to support their work in defending digital rights. Look for opportunities to support initiatives from groups such as Fight for the Future and Access Now, which may offer branded merchandise or special memberships. Tech companies like ProtonVPN and Mozilla might highlight their commitment to privacy and open internet principles. Additionally, educational platforms and digital rights groups may host free webinars or offer discounted resources on internet safety and censorship. We will update this page with confirmed live campaigns as April 4 approaches.

Platform Guide for 404 Day

X/Twitter

Mention @NatlToday and use #404Day. Share articles and statistics about internet censorship and digital rights.

Facebook

Mention National Today (facebook.com/nationaltoday) and use #404Day. Post about local initiatives or share personal stories related to internet access.

LinkedIn

Tag National Today (linkedin.com/company/nationaltoday) and use #404Day. Discuss policy implications of internet censorship in the workplace and education.

Social Media Tips for 404 Day

Individuals

Educate yourself on internet censorship policies like CIPA and advocate for digital rights in your community. Share resources on online privacy and security.

Creators

Produce short videos or infographics explaining the concept of a "404 error" and its symbolic connection to internet freedom. Interview digital rights advocates or share tips for navigating online restrictions.

Brands

Tech companies and internet service providers can use 404 Day to reaffirm their commitment to an open internet. Host a Q&A with experts on digital privacy or sponsor digital literacy programs.

Organizations & Brands for 404 Day

  1. Electronic Frontier Foundation (EFF)

    Founded in 1990, the EFF is an international non-profit digital rights group based in San Francisco. It provides legal aid and funds to defend individual liberties in the digital world.

  2. Mozilla

    The Mozilla Foundation, founded in 2003, is a non-profit organization that promotes openness, innovation, and opportunity on the internet. It is best known for developing the Firefox web browser.

  3. Fight for the Future

    A non-profit advocacy group, Fight for the Future works to protect and expand the internet's power for free expression and creativity. They are known for organizing large-scale online protests.

  4. Access Now

    Established in 2009, Access Now is an international non-profit organization dedicated to defending and extending the digital rights of users at risk. They provide direct technical assistance to activists and journalists.

  5. ProtonVPN

    Founded in 2017 by scientists who met at CERN, ProtonVPN is a virtual private network service that emphasizes privacy and security. It offers encrypted internet connections to protect user data.

  6. Wikimedia Foundation

    The non-profit organization that operates Wikipedia and its sister projects, the Wikimedia Foundation, founded in 2003, champions open knowledge and free access to information globally.

  7. DuckDuckGo

    Launched in 2008, DuckDuckGo is an internet search engine that emphasizes protecting searchers' privacy and avoiding the filter bubble of personalized search results. It does not store user information.

404 Day Hero

John Perry Barlow

John Perry Barlow (1947–2018) was an American poet, essayist, and cyberlibertarian political activist. He was a founding member of the Electronic Frontier Foundation (EFF) and authored "A Declaration of the Independence of Cyberspace" in 1996, advocating for a free and uncensored internet. His work laid much of the philosophical groundwork for digital rights.

History of 404 Day

April 4 is 404 Day, a day dedicated to raising awareness about Internet filtering in public schools and libraries across the United States. The Children’s Internet Protection Act (C.I.P.A.), a well-intentioned but flawed regulation, connects federal money for public schools and libraries to obligations to screen child pornography and anything obscene or damaging to kids. Unfortunately, among other issues, poor and converted filtering technologies and too aggressive filtering implementations result in the filtering of constitutionally protected speech.

Unfortunately, extreme interpretations of C.I.P.A. have resulted in excessive and unwarranted censorship in public libraries, frequently because libraries go beyond the legal limits of C.I.P.A. when establishing content filters for fear of breaching the law. As a result, students and library customers across the country are frequently and unnecessarily denied access to constitutionally protected websites, such as art museum websites or health-related websites.

According to Electronic Frontier Foundation (E.F.F.) and other internet freedom supporters, part of the problem is that web filters intended to protect young people from obscene information, such as pornography, accidentally block all kinds of useful, instructive, and non-porn websites. This includes genuine keyword conflations that ban pages on chicken “breasts” or breast cancer, as well as Shakespeare. It also goes after other content that is deemed “inappropriate” by authorities, such as non-mainstream faiths like Wicca or Native American spirituality, L.G.B.T.Q. information, underage tobacco use, and sexual health. According to the E.F.F., this is a violation of the First Amendment. This is why the E.F.F. is encouraging librarians, students, and concerned library users around the country to participate in 404 Day to raise awareness of prohibited websites and internet censorship in libraries. So, mark your calendars for 404 Day, to encourage your friends to blog about it, share it on social media, and help E.F.F. bring censorship in libraries and schools to light. Even though C.I.P.A. is nearly a decade old, library internet filtering is not permanent. We can raise awareness and draw attention to this essential problem if we work together.

404 Day timeline

1990
Introduced H.T.T.P. Status Codes

H.T.T.P.S. status codes, which had previously been devised in 1990, are introduced by the World Wide Web Consortium (W3C)

1992
404 is First Created

Tim Berners-Lee, the creator of the World Wide Web, defines the 404 codes in 1992, based on those used for the File Transfer Protocol, in which codes begin with four effective mistakes.

2000s
New Bill, Next Level

In exchange for continuous government support, the regulation is supposed to urge public libraries and schools to filter child pornography and obscene or harmful to children from their internet connections.

2005
404 Throughout the United States

The Children’s Internet Protection Act (C.I.P.A.) is approved by the United States Congress and reserves the use of filtering in libraries and schools across the country.

How Businesses Can Celebrate 404 Day

Local businesses can observe 404 Day by educating their employees and customers on digital privacy best practices and internet security. Tech companies could host workshops on secure browsing or offer free consultations on data protection. Libraries and schools can highlight their efforts to provide equitable internet access while also discussing the challenges of content filtering. Retailers might partner with digital rights organizations to raise awareness or support their advocacy efforts.

404 Day FAQs

When is 404 Day?

In 2027, 404 Day is observed on Sunday, April 4. This date consistently serves as a reminder to champion digital rights and combat online censorship.

What does "404" mean in internet terms?

The “404” in 404 Day refers to the common web error message, signifying a page that cannot be found. This digital metaphor is used to highlight the growing issue of online content being intentionally blocked or made inaccessible.

How many websites are censored globally?

Measuring global internet censorship is challenging, but estimates suggest that billions of people live in countries where the internet is not free. Governments often block access to thousands of websites, social media platforms, and apps, impacting a significant portion of the world’s online population.

What is the Children’s Internet Protection Act (CIPA)?

CIPA mandates that public schools and libraries filter internet content to protect children, but critics argue it has led to over-blocking and censorship of legitimate educational and health information. This act is a key focus for digital rights advocates on 404 Day.

404 Day Activities

  1. Find out about your neighborhood

    First and foremost, figure out whether your local libraries or public schools have excessive screening. Raise this with the authorities.

  2. Spread the word about 404

    If your local libraries and public schools have excessive filtering, be sure to raise awareness about it. Inform your relatives and acquainted. Use the hashtag #404Day on social media. The more people that are aware of this, the better.

  3. Others should be educated on rules

    The Children's Internet Protection Act (C.I.P.A.), for example, mandates schools and libraries to limit access to specific websites—those with indecent and pornographic images—to obtain government money. Educate those around you on this and rally them to the cause.

5 Interesting Facts About 404

  1. 404 means not found

    The response status code 404 Not Found indicates that the server was unable to locate the requested resource.

  2. Named after a room

    According to legend, 404 was called after a room at CERN, where the first web servers were housed.

  3. It’s both a joke and a meme

    The 404 should have broad appeal, aside from serving as a reminder of technology and the web.

  4. Immortalized in comic books or t-shirts

    The blunder has been immortalized in comic books and T-shirts, making it a more accessible and relevant aspect of what was formerly considered nerd comedy but is now a part of everyday life.

  5. Spark the creativity with 404 pages

    There are a lot of websites that use creativity for their 404 pages these days.

Why We Love 404 Day

  1. It raises awareness of over-aggressive use of Internet filter

    Websites offering critical health information, as well as educational and creative content, are frequently restricted. Raise awareness among family members and friends.

  2. Protecting your right to privacy and free speech

    The seemingly benign 404 error message may be concealing censorship. So, on 404 Day get engaged, promote awareness, and participate.

  3. It provides users with a good user experience

    The futility of filtering and how youngsters learned to avoid filters at a young age is a viable argument against 404. At the same time, it is scary how the filters disproportionately harm low-income populations or those who rely on public internet access.

404 Day dates

Year Date Day
2027 April 4 Sunday
2028 April 4 Tuesday
2029 April 4 Wednesday
2030 April 4 Thursday
2031 April 4 Friday