Your dates stay with you.

No account is required. Date calculations and holiday lookups run in your browser from static code and bundled data.

Network time

To estimate a reference time and device-clock difference, the browser requests a small static file from this site. The request contains no calculation inputs. Standard hosting logs may include IP address and user agent.

Sharing is your choice

Inputs are added to the URL only when you copy a share link. Anyone who receives that URL can read those inputs, so do not share confidential dates.

Calendar access

The site cannot read your Apple, Google, or Outlook calendar. ICS export creates a file only for the event you choose.

Analytics and advertising

This version contains no product event analytics, advertising code, tracking cookies, account identifiers, or tracking pixels.

Last updated: September 4, 2026.