How Do I Convert a Unix Timestamp to ISO 8601 in JavaScript?

Question

I have a timestamp like this 1331209044000 and I want to convert it to an ISO 8601 timestamp. How can I convert it using JavaScript?

I use the jQuery "timeago" plugin - http://timeago.yarp.com/

Answer 1

Assuming your timestamp is in milliseconds (or you can convert to milliseconds easily) then you can use the Date constructor and the date.toISOString() method.

var s = new Date(1331209044000).toISOString();
s; // => "2012-03-08T12:17:24.000Z"

If you target older browsers which do not support EMCAScript 5th Edition then you can use the strategies listed in this question: How do I output an ISO 8601 formatted string in JavaScript?

Answer 2

The solution i used, thanks to the links provided

// convert to ISO 8601 timestamp
function ISODateString(d){
    function pad(n){return n<10 ? '0'+n : n}
    return d.getUTCFullYear()+'-'
        + pad(d.getUTCMonth()+1)+'-'
        + pad(d.getUTCDate())+'T'
        + pad(d.getUTCHours())+':'
        + pad(d.getUTCMinutes())+':'
        + pad(d.getUTCSeconds())+'Z'
}

var d = new Date(parseInt(date));
console.log(ISODateString(d));