Corrections Policy

If you find an incorrect formula, date, holiday, label, or explanation, please send the page URL, the inputs you used, the result you received, and the result you expected through the contact page.

How corrections are handled

We reproduce the issue, compare the behavior with the stated methodology, and correct the shared generator when multiple pages are affected. Material errors are prioritized over stylistic changes. We do not silently preserve a known incorrect result for consistency with an older page.

Questions about assumptions are also useful: even when a calculation is correct, unclear scope or missing limitations can mislead readers and should be improved.