Issue with Date available?

Hi,

I'm running a webshop in Joomla 3.6.5 with Eshop 2.5.4 for my customer.
The webshop is based in the Netherlands, therefore both backend and frontend languages are set to Dutch.

My customer is using the option 'Available on (date)' for items which can not be delivered yet, but already can be ordered.
See image below. The date has been set to '9 mei 2017', it shows 2017-05-09, that's correct.



However, in the webshop the formatting of the date seems to be wrong, see image below.
Now the date has become 05-09-2017, so 5 September 2017.



The day and month are in the wrong order.
Is this a flaw in the code? Or do I have to change a setting in Eshop or Joomla?

Hope to hear soon.

Regards, Burt

PS. Great improvement on the backend interface in Eshop 2.5.4!