Your dates stay in your browser.

Chronos is a static website. Your date calculations run in your browser, and we do not operate a server that stores the dates you enter.

Historical event data is requested directly from Wikipedia’s public “On this day” feed. Your browser may make network requests to that third-party service when you calculate a birthday.

To improve speed, Chronos stores limited preferences such as theme, reduced-motion settings, chosen date format, and birthday-history cache entries in your browser’s local storage.

If you deploy this project yourself, update this policy to reflect your analytics, hosting, CDN, and contact details before going live.