Let’s get the details right.
A useful tool should also be easy to improve. Here’s what helps when something doesn’t look right.
Reporting a calculation issue
Keep a note of the tool name, the inputs you used, the result you received, and what you expected. For time-zone questions, include both zones and the selected date. Avoid sharing personal birth dates or other private information unnecessarily.
Questions about the site
The site operator has not published a public contact address yet. A verified contact method will be added here when it becomes available.
Before you report
Check the “Good to know” section on the tool page. Whether an end date is included, how weekends are handled, or which calendar is used can explain a result that initially looks unexpected.