Different date formats in respons form

I ask the birth date and the date of submission of the form. 

In the respons form I see different date dormats and randomly some peculiar dates ( i know they are wrong

How is this possible? and how do I solve this? 

Kind regards

Frans Timmermans

Thank you for contacting us.

Is the issue that the date is in a 'mm/dd/yyyy' format rather than a 'dd/mm/yyyy' format?

Please confirm, so we will be able to forward your feedback to our developers.