Report a calculation or content issue.
Helpful reports include the two dates used, the result shown, the result expected, and the rule or source behind that expectation. Do not include identity documents or other private information.
This page remains available as issue-reporting guidance while a verified public contact channel is prepared. No placeholder mailbox is presented as an active address. Until a contact method is published, verify important results with the documented method and the relevant authority.
Before reporting a date difference
Review the calculation method, especially the February 29 and month-end convention. Another calculator may be internally consistent while using a different anniversary rule.
Privacy request
The calculators do not transmit or store dates entered in their fields. If you report an issue later by email, use sample dates when possible and avoid sending names, records, or sensitive personal information.