The code is as follows, just attach it to the webpage code. The text can be modified properly and tested by itself.

 <script language=javascript> 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() var todayDate = today.getDate() var todayHour = today.getHours() var todayMinute = today.getMinutes() var todaySecond = today.getSeconds() var t1 = Date. UTC(2016,1,13,6,00,00) 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="<br><center><b>It has run so far"+diffYears+'years'+diffDays+"days"+diffHours+"hours"+diffMinutes+"minutes"+diffSeconds+"seconds</b></center>" } siteTime() </script> <script type="text/javascript"> $('# weather'). leoweather ({format: '<strong>{year} {month} {month} {day} week {week} {hour}: {minute}: {second}</strong>,</span><b>{city} {weather} {night temperature} ℃~{day temperature} ℃</b>'}); </script>

The effect is as follows:
Website custom run time and current time and weather code