Converting date format before display

Hi,

My site has a form created by a component called "Visforms", which contains a date field with a format like YYYY-MM-DD. This is something that, for some reasons, I cannot change.
Nevertheless, I would like that Table JX displays this date in the table as DD-MM-YYYY. This is something that seems to have no native solution.

I was thinking of adding a short conversion with a php code like:

$newDate = date("d-m-Y", strtotime($date));

Thank you Tomaz for the advice. I checked the components/com_grid/layouts/GridView.php file and its loop starting at line 277.
I've spent a lot of time trying to intervene in the loop but I'm definitely not comfortable enough in coding and did not succeed in changing the date format.

I first started with this line

if ($column=F3) $newDate = date("d-m-Y", strtotime($podatek));
echo $newDate;

Doesn't work, even with == ...
I'm very close to give up ... and a bit desperate