I just exported the CSV and the dates are all over the place...
Formats:
I have 04/04/2017 as well as 4.4.2017 in one file.
The . delimited dates are a mix of month.day.year and day.month.year
::zielperson::
Had a short look at the json backup and it does not seem to appear in that file, all dates are stored as year-month-day in there.
::zielperson::
Hmm, that's interesting!
Financier is doing localization of dates for the human readable export. Perhaps there is something wrong here.