How do I format a timestamp in Javascript to display it in graphs? UTC is fine

Question

Basically, I receive raw timestamps and I need to format them into HH:MM:SS format.

Answer 1

I'll go with the assumption that you mean Unix timestamps:

var formatTime = function(unixTimestamp) {
    var dt = new Date(unixTimestamp * 1000);

    var hours = dt.getHours();
    var minutes = dt.getMinutes();
    var seconds = dt.getSeconds();

    // the above dt.get...() functions return a single digit
    // so I prepend the zero here when needed
    if (hours < 10) 
     hours = '0' + hours;

    if (minutes < 10) 
     minutes = '0' + minutes;

    if (seconds < 10) 
     seconds = '0' + seconds;

    return hours + ":" + minutes + ":" + seconds;
}       

var formattedTime = formatTime(1266272460);
document.write(formattedTime);