Your birthday stays on your device

The calculator runs in your browser. Your date of birth is not included in a request, stored in a database, added to a URL, or saved in browser storage by this site.

Site analytics and fonts

Our hosting platform, XWM.app, loads an analytics script to measure site visits. The calculator does not send your birthday to analytics. Fonts are included with the site, so viewing a page does not request fonts from a separate font provider.

Hosting and external links

The hosting platform may process ordinary connection data, such as IP addresses and browser details, to deliver and secure the site. External source links take you to other websites with their own privacy practices.

Last updated October 29, 2026.