webform_date_format.module

<?php
/**
 * @file
 * Code for the Webform Date Format module.
 * Changes all Webform date fields to use British format rather than American.
 */

/**
 * Implements hook_webform_component_render_alter().
 */
function webform_date_format_webform_component_render_alter(&$element, &$component) {
  if ($element['#type'] == 'date') {
    $element['#process'][] = 'webform_date_format_webform_expand_date';
  }
}
 
/**
 * Process function to re-order the elements in the date widget.
 */
function webform_date_format_webform_expand_date($element) {
  $element['day']['#weight'] = 0;
  $element['month']['#weight'] = 1;
  $element['year']['#weight'] = 2;
  return $element;
}