Hi @dillehal
One way to achieve this would be to set d-m-Y as the return format. This option is available on the field options from the field group edit screen. Then use get_field(...) or the_field(...) function to display this on your frontend.
Alternatively, you could use $date = DateTime::createFromFormat(…) then $date->format(‘d-m-Y’); to format the date. Check out this link for more information: http://php.net/manual/en/datetime.createfromformat.php
