404 Day
National Coalition Against Censorship documented 404 Day as an April 4 day of action developed with the Electronic Frontier Foundation against overbroad internet censorship and filtering in schools and libraries.
Date and recurrence
4 April in the documented campaign
This is retained as historical or legacy evidence. The site does not assume that the observance still recurs today.
Scope and status
The verified scope stored for this record is U.S. digital-rights and library/school internet-filtering awareness campaign; treated as a legacy campaign unless a current organizer edition is confirmed. The site preserves that boundary and does not infer broader government, global or public-holiday status from the observance name alone.
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
- Refresh the target year before publishing a new date when the record is not safely portable.
- Historical Context Only.
Sources
- National Coalition Against Censorship — 404 DayCivil Liberties Organization
- NCAC — 404 Day event archiveCivil Liberties Organization
Frequently asked questions
When is 404 Day?
4 April in the documented campaign The stored recurrence guidance is: Historical/legacy date context only; do not assume current annual recurrence: 4 April in the documented campaign.
Does 404 Day fall on the same date every year?
The record is historical/legacy and is not treated as a currently recurring annual date.
Is 404 Day an official public holiday?
The authority record verifies it within this scope: U.S. digital-rights and library/school internet-filtering awareness campaign; treated as a legacy campaign unless a current organizer edition is confirmed. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when the supporting authority record explicitly does so.
Who established or recognizes 404 Day?
The stored designation basis is: National Coalition Against Censorship documented 404 Day as an April 4 day of action developed with the Electronic Frontier Foundation against overbroad internet censorship and filtering in schools and libraries.. Supporting provenance includes National Coalition Against Censorship — 404 Day. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is 404 Day international or country-specific?
This authority record is country-scoped to United States. Its fuller verified scope is: U.S. digital-rights and library/school internet-filtering awareness campaign; treated as a legacy campaign unless a current organizer edition is confirmed.
How is this page verified?
The factual layer is source-backed and keeps its date rule, scope, provenance and editorial guardrails attached to the authority record. This record was checked on 2026-09-07.