Privacy Policy
Last updated: 14 November 2026.
Short version
This site does not collect, store or share any personal information. The calculators run entirely in your web browser: the dates you enter never leave your device.
What the tools do with your input
When you use a calculator, your browser works out the answer on your own device. The dates you type are not sent to a server, not saved anywhere, and not shared with anyone. Closing the page erases them.
Cookies and tracking
This site sets no cookies and runs no analytics. It loads no fonts, scripts, images or other content from third-party websites, so no third party receives information about your visit from this site's pages themselves.
Contact by email
If you email us at hello@datemathtools.com, we receive whatever you choose to put in the email. We use it only to reply to you, and we do not share it with anyone. Please do not send personal documents or sensitive information.
Advertising
This site may show advertising in the future. If advertising is added, this policy will be updated to explain what the advertising provider collects and how you can control it.
Children
This site is a general-purpose calculator site. It does not ask for any personal information from anyone, including children.
Changes to this policy
If this policy changes, the "Last updated" date at the top of this page will change too. The current version is always the one published on this page.