All reports of package-contains-ancient-file for the archive. The extended description of this tag is:

Your package contains a file that claims to have been generated more than 20 years ago. This is most probably an error. Your package will be rejected by the Debian archive scripts if it contains a file with such a timestamp.

Severity: serious, Certainty: certain

Check: files, Type: binary, udeb

This tag has not been emitted in any package tested by Lintian.