Accessibility statement

We aim for this calculator to meet WCAG 2.2 Level AA, the standard referenced by the European Accessibility Act (effective June 2025) and by Section 508 / ADA Title III guidance in the United States.

What we do

• Semantic markup with one <h1>, landmarks (<main>, <header>, <footer>, <nav>), and labeled form controls.
• Keyboard-accessible interactions, including a skip-to-main link.
• Result and error regions announced via aria-live.
• Visible focus styles preserved (not removed via outline: none).
• Colour-contrast ratios meeting 4.5:1 for body text and 3:1 for large text.
• Respects prefers-reduced-motion for the counter and band microinteractions.

Known limitations

• Date pickers default to the browser's native <input type="date"> control, whose UX varies across browsers / OS. Users can also type the date in YYYY-MM-DD format.
• The 180-day band uses small per-day cells with title tooltips; full per-cell screen-reader labels would be too verbose, so the band's overall meaning is described via an aria-label summary rather than per cell.

Feedback

If you hit an accessibility barrier, email [email protected]. We aim to respond and remediate promptly.

Last reviewed: 2026-06-01.