Terms of Service

Last updated: September 14, 2026

Using this site

Between Two Dates provides free date and age calculators for educational and informational use. No account or sign-up is required, and there is no charge to use any page on this site.

Not medical, legal or financial advice

The calculations on this site are calendar arithmetic, not professional advice. The reverse due date and gestational age calculators use Naegele's rule, a 280-day rule of thumb that assumes a textbook-average cycle; actual due dates and gestational age are determined by a clinician, typically by ultrasound, and can differ from this estimate by more than a week in either direction. The business days calculator uses the standard US federal holiday calendar as a default, not your employer's or jurisdiction's specific calendar. Nothing here is medical, legal, payroll or financial advice; confirm anything that matters with the relevant professional or authority.

No warranty

This site is provided "as is," without warranty of any kind, express or implied, including but not limited to accuracy, reliability, or fitness for a particular purpose. Use of any calculator or content on this site is at your own risk.

Limitation of liability

To the fullest extent permitted by law, Between Two Dates and its operator are not liable for any loss or damage arising from use of, or reliance on, this site or its content.

Advertising

This site may display ads served by Google AdSense and other third-party advertising networks. See the Privacy Policy for details on how those networks use cookies and similar technologies.

Content

The text, design, and code on this site belong to Between Two Dates unless otherwise noted. You're welcome to link to any page here; please don't republish or scrape the content wholesale without permission.

Changes

These terms may be updated from time to time. Continued use of the site after a change means you accept the updated terms.

Contact

Questions about these terms? Reach out at hello@betweentwodates.com.