time.js

function siteTime() {

  window.setTimeout("siteTime()", 1000);

     var seconds = 1000;

     var minutes = seconds * 60;

     var hours = minutes * 60;

     var days = hours * 24;

     var years = days * 365;

     var today = new Date();

     var todayYear = today.getFullYear();

     var todayMonth = today.getMonth() + 1;

     var todayDate = today.getDate();

     var todayHour = today.getHours();

     var todayMinute = today.getMinutes();

     var todaySecond = today.getSeconds();

     var t1 = Date.UTC(2023, 01, 11, 00, 00, 00); 

     var t2 = Date.UTC(todayYear, todayMonth, todayDate, todayHour, todayMinute, todaySecond);

     var diff = t2 - t1;

     var diffYears = Math.floor(diff / years);

     var diffDays = Math.floor((diff / days) - diffYears * 365);

     var diffHours = Math.floor((diff - (diffYears * 365 + diffDays) * days) / hours);

     var diffMinutes = Math.floor((diff - (diffYears * 365 + diffDays) * days - diffHours * hours) / minutes);

     var diffSeconds = Math.floor((diff - (diffYears * 365 + diffDays) * days - diffHours * hours - diffMinutes * minutes) / seconds);

         document.getElementById("sitetime").innerHTML = "本站安全运行 " + diffYears + " 年 " + diffDays + " 天 " + diffHours + " 小时 " + diffMinutes + " 分钟 " + diffSeconds + " 秒";

         }  

siteTime();