In the moment data gets concatenated for a data field the format isn't respected. " Rechnung "&[RechnungsID]&"/20" or "Berlin "&[Rechnungsdatum] have the result: Berlin Montag, 13. Juli 2020 um 00:00:00 Mitteleuropäische Sommerzeit Thanks for your help michael
... a workaround for the date would be to make your own format: "Berlin, den "T. MMMM JJJJ but the problems of the formats seem to affect every format, like currency, date,.....
Concatenating fields will set the field to a field for characters only. It is the same as in the database. Set two fields, one for the text, the other for the date.