Date Calculator

Privacy Policy

Last updated: September 2026. Your privacy is our foremost priority.

Core Privacy Principle:Calculations occur 100% locally inside your web browser. Any dates, birthdays, shift hours, or schedules you enter are never sent to our servers, never recorded in a database, and never sold to anyone.

1. Information We Do NOT Collect

We do not require user accounts, logins, or personal profiles. When you use any calculator on Date Calculator:

  • We do NOT capture or transmit your birth date or age.
  • We do NOT store your project deadlines or business calendar dates.
  • We do NOT link calculator values with user identity.
  • We do NOT log calculator inputs in analytics events.

2. Local Storage & Preferences

We may store your interface preference (such as Light, Dark, or System mode) in your browser’s local storage to preserve your selected theme between visits. No personal dates are stored.

3. Aggregated Anonymous Analytics

To maintain site performance and understand which calculators are most useful, we may collect aggregated, non-identifying telemetry (such as page views, device type, or clicks on calculator buttons). These events never contain your entered dates or times.

4. Advertising & Third-Party Cookies

We may display advertisements provided by reputable partners such as Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on prior visits to this or other websites. You may opt out of personalized advertising by visiting Google’s Ads Settings or using our cookie preferences.

5. Contact Us

If you have any questions regarding this Privacy Policy, please contact us at privacy@datecalculator.org.