I’m looking for the same solution.
Are you using contact form 7?
If so, I found out how to receive this format on e-mail (you change it on mail configuration)
[_format_{field name} “{date format}”].
[_format_data “d/m/y”]
source: https://contactform7.com/date-field/
But so far I don’t know how to change the function at all to work with flamingo and other automated export systems.
