Panel date not showing month name in my locale

The dates in the Panel (date edit) always show the English month name. I have almost changed everything I could think off.

  • I have set the user language → this will change the months language only in the popup calendar for date selection.
  • I have changed my browser language in system settings (macOS) → nothing changed in the date fields language still English.
  • I have not been able to find a setting in Herd to change a language. (I examined every file from ‘open configuration files’ in Herd)
  • I have changed the date_handler in the config with the locale → no change in the field. (But this helped with the date output from my template, so that was good.)
    'date.handler' => 'intl',
    'locale'       => 'nl_NL',
  • In my blueprint I have
...
      Consulten:
        type: structure
        preview: fields
        wysiwyg: true
...
        fields:
          datumtest:
            type: date
            label: testdatum
            display: D mmm 'YY

Questions:

  • Is it possible to change the language of the months in the edit field of the panel?
  • If yes, how can I do this, where did I go wrong?

Thanks,
René

I just found this, but it must be unrelated and its 4 years old: dayjs: load locale for UI translation (code splitting) by distantnative · Pull Request #2906 · getkirby/kirby · GitHub

This is unfortunately not supported, see Date field - date are not localized (fr) - #3 by distantnative

Thank you for clarifying.
And thanks for the link!
I searched for the subject, but this one did not came up in my search results.

René