Date Time Calculator.Fast & Private
Privacy by Design

Privacy Policy

Last Updated: September 2026 • Effective Immediately

Our Core Privacy Commitment: Zero Server Data Processing

When you enter your dates of birth, project milestones, or personal dates into Date Time Calculator, they are processed entirely in your web browser memory using client-side JavaScript. No dates are sent to, stored on, or analyzed by our web servers.

1. Information We Do NOT Collect

Unlike many online tools, Date Time Calculator is designed as a zero-login, registration-free utility. Consequently, we do not collect:

  • Your name, email address, physical address, or phone number.
  • User account credentials or login passwords.
  • The specific calendar dates you choose to calculate (birthdays, anniversary dates, contracts).
  • Calculation outcomes or personal notes.

2. Technical & Aggregate Analytics

To understand global website performance, monitor server load, and detect browser rendering errors, we may collect standard anonymous web traffic telemetry. This includes:

  • Browser type and operating system version (e.g. Chrome on Windows, Safari on iOS).
  • Screen resolution and device category (Mobile, Tablet, Desktop) to optimize UI touch targets.
  • Referring webpage and country-level geographic region.
  • Time spent on site and total daily pageviews.

This diagnostic information is processed solely in aggregate and cannot be used to personally identify you.

3. Cookies and Local Storage

Date Time Calculator does not use tracking cookies to follow your activity across the internet. We may utilize your browser’s standard localStorage purely to remember your theme preference (Light Mode vs Dark Mode).

4. Advertising & Third-Party Services

To sustain free access to our tools without subscriptions, we may display unobtrusive third-party banner advertisements (such as Google AdSense). These third-party advertising partners may use non-personalized cookies or web beacons to measure ad effectiveness in accordance with their respective privacy disclosures.

5. GDPR & CCPA Compliance

Because we do not store, process, or sell personal identifiers or user databases, Date Time Calculator intrinsically respects data minimization principles outlined in the General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA).

6. Changes to this Policy

Any future revisions to our privacy practices will be posted directly to this page with an updated modification timestamp.