Contact DateCalc.org

For corrections, accessibility problems, or questions about a formula, email [email protected].

Please include the page URL, calculator inputs, expected result, actual result, and browser if the problem is interactive. Do not send passwords, account numbers, medical records, or other sensitive information.

What to expect

Reports are reviewed for reproducibility and scope. A problem in a shared formula may affect many generated pages, so the correction is made in the generator and checked across the whole page family. We may not be able to provide individual financial, medical, legal, tax, construction, or payroll advice.

Useful feedback

We also welcome reports of unclear assumptions, keyboard or screen-reader barriers, broken downloads, duplicate pages, and content that does not accurately describe what a calculator does.