
The Date element in Quform does not support the Hijri calendar but using a script you can attach a Hijri calendar/datepicker to a Text element.
Step 1
Add a Text element to the form, in the Settings on the Styles tab you can set a calendar icon on the field if you wish.
Step 2
Download the following three files and upload them to your web server in the wp-content directory.
Step 3
Add the following code to the theme functions.php file (or create a plugin for it).
1 2 3 4 5  | add_action('wp_enqueue_scripts', function () { wp_enqueue_style('calendar', content_url('calendar.css')); wp_enqueue_script('hijri-date', content_url('hijri-date.js'), array(), false, true); wp_enqueue_script('calendar', content_url('calendar.js'), array('hijri-date'), false, true); });  | 
add_action('wp_enqueue_scripts', function () {
    wp_enqueue_style('calendar', content_url('calendar.css'));
    wp_enqueue_script('hijri-date', content_url('hijri-date.js'), array(), false, true);
    wp_enqueue_script('calendar', content_url('calendar.js'), array('hijri-date'), false, true);
});1 2 3 4 5 6 7  | function my_enqueue_scripts() { wp_enqueue_style('calendar', content_url('calendar.css')); wp_enqueue_script('hijri-date', content_url('hijri-date.js'), array(), false, true); wp_enqueue_script('calendar', content_url('calendar.js'), array('hijri-date'), false, true); } add_action('wp_enqueue_scripts', 'my_enqueue_scripts');  | 
function my_enqueue_scripts()
{
    wp_enqueue_style('calendar', content_url('calendar.css'));
    wp_enqueue_script('hijri-date', content_url('hijri-date.js'), array(), false, true);
    wp_enqueue_script('calendar', content_url('calendar.js'), array('hijri-date'), false, true);
}
add_action('wp_enqueue_scripts', 'my_enqueue_scripts');Step 4
Go to Forms → Settings → Custom CSS & JS and in the Custom JavaScript field enter the following code.
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 | jQuery(function ($) { if (window.Calendar) { var calendar = new Calendar(true, 0), $field = $('.quform-field-1_3'); $field.closest('.quform-inner').append(calendar.getElement()); $field.focus(function () { calendar.show(); }); calendar.callback = function () { $field.val(calendar.getDate().getDateString()); }; } });  | 
jQuery(function ($) {
    if (window.Calendar) {
        var calendar = new Calendar(true, 0),
            $field = $('.quform-field-1_3');
        $field.closest('.quform-inner').append(calendar.getElement());
        $field.focus(function () {
            calendar.show();
        });
        calendar.callback = function () {
            $field.val(calendar.getDate().getDateString());
        };
    }
});- On line 4, replace 
1_3with the Text element unique ID 
