Take a look in the editor and in the database. If this isn’t exactly what you need, let me know.
But basically, in the case of dates, just use the “formated as” operator and if none of the predefined options work for your use case (in this case we need one without comma), just use the “Custom” option.
Remembering that this operator changes the formatting only for viewing the data, but the data remains in the same format saved in the database.