Website HTML Javascript Clock (Date and Time)


  • This generator allows you to create the Javascript code necessary to put a text clock on your website that can display the current time (and date). The clock keeps updating in real time. Multiple time and date formats to choose from.


  1. Select how you want your clock/calendar to look
  2. Generate the HTML and JavaScript code for your clock (button at bottom)
  3. Preview your clock at the bottom above the code
  4. Copy and Paste the Source Code into your HTML page


  • If you want to change the size, font, or color you can edit the last line of your generated code and add a style="" property like: <div id="clockbox" style="font:14pt Arial; color:#FF0000;"></div>

Text Clock Format
Date Format: Time Format:

Source Code
loading clock preview...


Thank you very much for this code. Only one question. How to put this code in center.

If you want to have the time use a specific timezone, replace: var d=new Date();with:
var tzOffset = -5;//set this to the number of hours offset from UTC

var d=new Date();
var dx=d.toGMTString();
dx=dx.substr(0,dx.length -3);
Setting the tzOffset value to the UTC hours offset your timezone has. If you don't know what value to use, when you go to set your clock in Windows, the timezones listed all show their UTC offset. Like (UTC-05:00) Eastern Time which would be -5.

NOTE: Daylight Savings Time is not automatically taken into account. Meaning Eastern Time is normally tzOffset = -5; but Eastern Time on DST is actually tzOffset = -4; value. Sadly there is no good way to account for DST using only JavaScript.

To get around the Daylight Savings Time bug above, you can use PHP to use the server to calculate the timezone offset and automatically adjust for DST if necessary. However, this does require that the server/page supports PHP (if you aren't sure, it probably does not support PHP).

If you have PHP, replace: var d=new Date();with:
var d=new Date();
var dx=d.toGMTString();
dx=dx.substr(0,dx.length -3);
d.setSeconds(d.getSeconds() + <?php date_default_timezone_set('America/New_York'); echo date('Z'); ?>);
where 'America/New_York' is the timezone you want to use.
List of Supported Timezones

You need to use PHP/Javascript to figure out the time difference between the server and the browser then adjust the new Date() accordingly.

For anyone wanting to do this in PHP, replace:
<script type="text/javascript">with:

<script type="text/javascript">
var offset = Math.round(new Date().getTime() / 1000);

and replace
var d=new Date();with:
var d=new Date();
d.setSeconds(d.getSeconds() + <?php echo time(); ?> - offset);

tday=new Array("Sonntag","Montag","Dienstag","Mittwoch","Donnerstag","Freitag","Samstag");
tmonth=new Array("Jänner","Februar","März","April","Mai","Juni","Juli","August","September","Oktober","November","Dezember");

To display the same clock in multiple locations, look for the line similar to: document.getElementById('clockbox').innerHTML=""+tday[nday]+", "+tmonth[nmonth]+" "+ndate+", "+nyear+" "+nhour+":"+nmin+":"+nsec+ap+""; and change it to
var obj=document.querySelectorAll('.clockbox');
for(var i in obj){
obj[i].innerHTML=""+tday[nday]+", "+tmonth[nmonth]+" "+ndate+", "+nyear+" "+nhour+":"+nmin+":"+nsec+ap+"";
note that the last part after .innerHTML= may be different in your code and you will need to keep your differences to retain your clock format choices (my example was using default formatting).

Then use <div class="clockbox"></div> anywhere on the page you want the clock to appear (note that it changed from id="" to class="" attribute)

Hi, i need to put date changing only once a week and not every day, how to do that? For example, each fridays it updates autoamtically.

This should do what you want. Change day_of_week to the value you need. Where 0=sunday up to 6=saturday

Your code might be a bit different depending on your display options. But the lines in bold are the lines I added:
<script type="text/javascript"> tday=new Array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"); tmonth=new Array("January","February","March","April","May","June","July","August","September","October","November","December"); var day_of_week = 5;//0=sunday, 6=saturday function GetClock(){ var d=new Date(); if(d.getDay()>day_of_week)day_of_week+=7; d.setDate(d.getDate()+(day_of_week-d.getDay()));//sets day of month var nday=d.getDay(),nmonth=d.getMonth(),ndate=d.getDate(),nyear=d.getYear(); if(nyear<1000) nyear+=1900; document.getElementById('clockbox').innerHTML=""+tday[nday]+", "+tmonth[nmonth]+" "+ndate+", "+nyear+""; } window.onload=function(){ GetClock(); setInterval(GetClock,1000); } </script> <div id="clockbox"></div>

Is the any way you could add st, nd, rd, th after the date. i.e. 1st and in Superscript

You can add the following block into any GetClock that has a date. Add it under any other if() checks:

else if(ndate%10==2){ndate+="nd";}
else if(ndate%10==3){ndate+="rd";}
with superscript, it'll look like
else if(ndate%10==2){ndate+="<sup>nd</sup>";}
else if(ndate%10==3){ndate+="<sup>rd</sup>";}

Is there a way to start the clock with a date in the past and have it go from there as opposed to using the actual date? (I'm trying to use it for an RP forum set in the past with a starting date of October 10, 1997)

Right under the line:
var d=new Date(); you can manually change the date values like

var d=new Date();
However, you will need some type of formula for how to find those values. Something like
var d=new Date();
or whatever your formula is.

Thank you so much for this! Two questions:
How do I change the format to look like this: "Sunday, 7 June 2015 10:50"?
How do I change the font?
As you can tell I do not really know what I'm doing, so I appreciate your help!

For the format, there's a line near the bottom that starts with document.getElementById('clockbox').innerHTML= where you can just switch +ndate+ and +tmonth[nmonth]+ values.

If you want to change the size, font, or color you can edit the last line of your generated code and add a style="" property like:
<div id="clockbox" style="font:14pt Arial; color:#FF0000;"></div>

Thanks for the response! Everything looks great.

I am trying to get the font to and color to be customized to match my website text while at the same time being centered on my home screen. But when I try adjusting the code to work with my requests, the font and color adjust, but the clock does not center. I will provide the code for you to see what I did. Any suggestions?
<div id="clockbox" style="font:10pt Arial; style=text-align:center;" ></div>

It looks like you have two style tags. One of which is unclosed. Try:
<div id="clockbox" style="font:10pt Arial;text-align:center;"></div>