[Forminator Pro] - Fix date offset validation issue with page reload method

wpmudev-date-offset-validation-fix.php

<?php
/**
 * Plugin Name: [Forminator Pro] Fix date offset validation issue with page reload method
 * Description: Fix date offset validation issue with page reload method.
 * Author: Prashant @ WPMUDEV
 * Task: SLS-7000
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

add_action(
	'wp_footer',
	function () {
		global $post;
		if ( is_a( $post, 'WP_Post' ) && ! has_shortcode( $post->post_content, 'forminator_form' ) ) {
			return;
		}
		?>
		<script type="text/javascript">
		jQuery(document).ready(function($){
			setTimeout(function() {
				$('.forminator-custom-form').trigger('after.load.forminator');
			},500);
			
			$(document).on('after.load.forminator', function(e, form_id) {
				if ( 'forminator-module-71' === e.target.id ) { // Please change the form ID.
					$.validator.addMethod("date_valid", function (value, element) {
						var start_date = $(element).attr('data-start-date').split('-').join('/');
						start_date     = Date.parse( start_date );
						value          = value.split('.').reverse().join('/');
						value          = Date.parse( value );
						if ( value && value < start_date ) {
							return false;
						}
						return true;
					},"Bitte gib ein gültiges Datum ein.");
					$( "#date-1 input" ).attr( "date_valid", "date_valid" );
				}
			});
		});
		</script>
		<?php
	},
	9999
);