Contact
NepDate is run in the open on GitHub, so every way to reach the project goes through it. You need a free GitHub account to open an issue. The maintainers read every issue.
A wrong date, holiday or tithi
Use the data error form and choose "Data error". Say the BS date, what NepDate shows and what it should show, with a source if you have one. One fix in the hub reaches every language, the patro and MitiBar.
A question or a bug
For a question about the calendar, the documentation or the project, open an issue in the hub repository. A bug in one language's library goes to that library's repository, linked from its guide (for example, the Python guide links to sanamhub/nepdate-python). Include the version, the code you ran and what you expected.
A security problem
Do not open a public issue. Report it privately through GitHub security advisories, or through the advisories of the affected language's repository. Expect a first reply within a week. The security policy has the details.
Contributing
Fixes, translations and new examples are welcome. Contributing explains how the repositories fit together and what a pull request needs.