按时区显示时间新日期

Question

如何让 JavaScript 日期按时区显示时间？

我尝试这样做：

var smart_today = new Date('Sat Apr 03 2021 18:54:00 ');

但是当我刷新页面时，时间一直在重新加载。那么有没有办法让这段代码正常工作？

https://jsfiddle.net/5np87g43/

jQuery(document).ready(function($){
        (function(element){
            var $element = $(element), $wrap = $('.spt-wrap', $element);
            var smart_today = new Date('Sat Apr 03 2021 18:54:00 ');
            function getdate($timezone){
                var guest_today = new Date();
                var today = ($timezone == 'current_timezone')? smart_today : guest_today;
                if($timezone == 'current_timezone'){
                        // today.setMinutes(today.getMinutes());
                        // today.setHours(today.getHours());
                    today.setSeconds(today.getSeconds() + 1 );
                    today.setSeconds(guest_today.getSeconds());
                }
        }
}