Countdown between a date and today's date

countdown.js

//THIS MAY NOT BE THE BEST POSSIBLE WAY TO DO
//THIS CODE IS OLD AND I DIDN'T LOOK INTO IT BEFORE POSTING
//I WILL CHECK AND UPDATE IT IF NECESSARY IN THE FUTURE
//THIS IS JSUT TO TEST GITHUB'S GIST.

// Set the date we're counting down to
var countDownDate = new Date("July 19, 2018 13:15:00").getTime();

// Update the count down every 1 second
var x = setInterval(function() {

    // Get today's date and time
    var now = new Date().getTime();

    // Find the distance between now and the count down date
    var distance = countDownDate - now;

    // Time calculations for days, hours, minutes and seconds
    var days = -Math.floor(distance / (1000 * 60 * 60 * 24));
    var hours = -Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
    var minutes = -Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
    var seconds = -Math.floor((distance % (1000 * 60)) / 1000);

    if (hours < 10) {
        hours="0"+ hours;
    }
    if (minutes < 10){
        minutes="0"+ minutes;
    }
    if (seconds < 10){
        secondes="0"+ seconds;
    }

    // Display the result in the element with id="demo"
    document.getElementById("demo").innerHTML = days + " : " + hours + " : "
    + minutes + " : " + seconds;
}, 1000);

THIS MAY NOT BE THE BEST POSSIBLE WAY TO DO
THIS CODE IS OLD AND I DIDN'T LOOK INTO IT BEFORE POSTING
I WILL CHECK AND UPDATE IT IF NECESSARY IN THE FUTURE
THIS IS JSUT TO TEST GITHUB'S GIST.