timer

gistfile1.txt

//html
<p  id="time"></p>

//js
let countDownDate = new Date("May 17, 2019 16:00:00").getTime();
    let x = setInterval(function() {
        let now = new Date().getTime();
        let distance = countDownDate - now;
        let days = Math.floor(distance / (1000 * 60 * 60 * 24));
        let hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
        let minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
        let seconds = Math.floor((distance % (1000 * 60)) / 1000);
        document.getElementById("time").innerHTML = days + "д " + hours + "г "
            + minutes + "хв " + seconds + "с ";

    }, 1000);