Index: wp-includes/script-loader.php
===================================================================
--- wp-includes/script-loader.php	(revision 40568)
+++ wp-includes/script-loader.php	(working copy)
@@ -989,6 +989,7 @@
 		'isRTL'           => $wp_locale->is_rtl(),
 	) );
 
+	wp_enqueue_script( 'jquery-ui-datepicker', '/jquery-ui-datepicker-custom.js', array(), '1.0' );
 	wp_add_inline_script( 'jquery-ui-datepicker', "jQuery(document).ready(function(jQuery){jQuery.datepicker.setDefaults({$datepicker_defaults});});" );
 }