I was having problems with this, maintaining the UK dd/mm/yyyy format, I initially used the answer from adeneo https://stackoverflow.com/a/18021130/243905 but that didnt work in safari for me so changed to this, which as far as I can tell works all over - using the jquery-ui datepicker, jquery validation.
if ($('[type="date"]').prop('type') !== 'date') {
//for reloading/displaying the ISO format back into input again
var val = $('[type="date"]').each(function () {
var val = $(this).val();
if (val !== undefined && val.indexOf('-') > 0) {
var arr = val.split('-');
$(this).val(arr[2] + '/' + arr[1] + '/' + arr[0]);
}
});
//add in the datepicker
$('[type="date"]').datepicker(datapickeroptions);
//stops the invalid date when validated in safari
jQuery.validator.methods["date"] = function (value, element) {
var shortDateFormat = "dd/mm/yy";
var res = true;
try {
$.datepicker.parseDate(shortDateFormat, value);
} catch (error) {
res = false;
}
return res;
}
}