Date format not correct during upload

Problem
When importing tools into mein_werkzeugkoffer, the date is entered in Excel in the correct format (dd.mm.yyyy).
However, when saving the CSV file with Excel, the date is saved in a different format.

Solution
Change the column format of the date column. To do this, right-click in the column header and select "Format cell".
Select "Custom" in the category in the left column. At Type you now enter "DD.MM.YYYY". Click on Ok and save the file.
Excel now saves the date in the correct format and you can now import the file into my_toolbox.