Wrong german error message in case of invalid dates

We noticed a wrong german error message in case of invalid dates. Please note that the german translation of day, month and year is Tag, Monat and Jahr, respectively. Therefore the german format of a valid day is abbreviated by tt.MM.jjjj . According to the attached screenshot the current abbreviation by ZK is tt.MM.uuuu. We kindly ask you to correct the german error message. Thanks in advance!