U.S. and International Web Accessibility Regulatory Timeline: 21 Sourced Events from the 1990 ADA to the 2028 Title II Deadline

21 dated regulatory events that determine when a website in the United States, the European Union, or Ontario is legally required to meet a technical accessibility standard. Each row carries the date, the authority that issued it, the entities it binds, the technical standard it points to, and a primary source URL. Fields. event_id, date, event, jurisdiction, authority, category, applies_to, technical_standard, summary, status, source_url, source_title, as_of. Coverage. 1990 ADA enactment through the 2028 compliance dates for large and small public entities under 28 CFR Part 35. Includes the 2024 DOJ final rule, the 2018 Section 508 refresh, WCAG 2.1 and 2.2 publication dates, the European Accessibility Act, Ontario AODA, and the 2025-2026 appellate activity on Title II web claims. Why a dated table beats prose. Remediation scoping questions are deadline questions. A structured timeline lets procurement, legal, and engineering read the same dates, and lets software answer "what applies to this client and when" without re-reading regulations. Part of the Veduis accessibility benchmark set. Maintained by Veduis LLC. Deadline checker and domain scanner: vComplianceScanner. Title II versus Title III analysis: which law applies to a website. Demand letter response workflow: ADA demand letter defense. Company: veduis.com. Primary sources used. ADA.gov, Section508.gov, the Federal Register, W3C, EUR-Lex, and the Ontario government. Every row links its source. License. CC BY 4.0. Reuse with attribution to Veduis LLC.