Allow proper parsing of dates in the format ddmmyyyy

[jmartens]

Summary of changes

Allow proper parsing of dates in the format ddmmyyyy

Closes #1163

Pull Request Checklist

• [X] Changes have tests
• [X] Authors have been added to AUTHORS.md
• [X] News fragment added in changelog.d. See CONTRIBUTING.md for details

[jmartens]

It seems a lot off tests fail, but they seem to be in a different code path AFAICT, should I rebase my branch to another branch or commit?