Privacy Policy
Last updated: April 2026
Overview
datecalculator.one is committed to protecting your privacy. This privacy policy explains how we handle information when you use our website and tools.
Client-Side Processing
All date calculations, age computations, time zone conversions, and other tool operations are performed entirely in your web browser using JavaScript. Your input data, including birth dates, event dates, and any other information you enter into our tools, is never transmitted to our servers or any third-party servers. Your data stays on your device at all times.
Information We Do Not Collect
We do not collect, store, or process:
- Birth dates or ages you enter into our calculators
- Dates, times, or time zones you convert
- Event names or countdown targets
- Any personal information entered into our tools
- User accounts or login credentials (we have no account system)
Information We May Collect
Like most websites, we may collect limited, non-personal information through:
- Analytics: We may use privacy-respecting analytics to understand general usage patterns such as page views, popular tools, and geographic regions. This data is aggregated and cannot identify individual users.
- Cookies: We use minimal cookies for essential functionality such as remembering your dark/light mode preference. We do not use tracking cookies.
- Advertising: Our site may display advertisements from third-party ad networks. These networks may use their own cookies and tracking technologies. Please refer to their respective privacy policies for details.
Third-Party Services
Our website may include advertisements served by third-party advertising networks. These services may collect information about your visits to this and other websites to provide relevant advertisements. We do not control the data collection practices of these third-party services.
Data Security
Since we do not collect or store your personal data from tool usage, there is no personal data at risk. Our website is served over HTTPS to ensure secure communication between your browser and our servers.
Children's Privacy
Our tools are general-purpose utilities suitable for all ages. We do not knowingly collect personal information from children under 13. Since our tools process data entirely in the browser, no personal data is collected from any user regardless of age.
Changes to This Policy
We may update this privacy policy from time to time. Any changes will be posted on this page with an updated revision date. We encourage you to review this policy periodically.
Contact Us
If you have any questions about this privacy policy, please contact us at hello@datecalculator.one.