Dates you enter in the calculators

  • Calculations happen in your browser, using JavaScript loaded from this site.
  • Dates you enter are not sent to this website or anyone else, and are not saved. The date fields can’t be submitted, so your dates never appear in a web address.
  • When you close or reload the page, the dates are gone.
  • “Copy result” places text on your device’s clipboard, “Print” uses your browser’s print dialog, and a calendar file, where offered, is created on your device. None of these send anything to this website.

Cookies, storage and tracking

  • The site’s code sets no cookies and does not use browser storage such as local storage.
  • There is no analytics, no advertising, no tracking pixels and no social media widgets.
  • Fonts, styles and scripts are served from this website. The pages make no requests to other companies’ servers.
  • The site’s security policy tells your browser not to send data from these pages to any server. The only exception is the contact form, which can send only to this website.

If you use the contact form

  • The contact form collects the name, email address and message you enter. Nothing is sent until you press “Send message”.
  • We use this information only to read and respond to your message.
  • Your message is sent by email to the site’s inbox through the web host’s email system. The website itself doesn’t save it to a file or database.
  • Please don’t include medical or other sensitive details you don’t need to share.

What the web host may record

Like most websites, this site is served by a hosting provider, whose servers may keep standard access logs when a page is requested. These logs typically include your IP address, the date and time, the page or file requested, your browser’s user-agent string and the referring page. They do not include the dates you enter in a calculator, because those dates are never sent. This site does not use these logs to track or profile visitors, and their retention is set by the hosting provider.

Links to other websites

Source lists link to external websites, such as medical guidance and journal pages. If you follow one of these links, that website’s own privacy policy applies.

Changes to this page

If the way this site handles information changes — for example, if a feature is added that works differently — this page will be updated first, and the date at the top will change.

Contact

Questions about this page? Use the contact page.