Перевод секунд в часы дни и т.д

var date = new Date(Date.now()-20031),
  d = ("0"+date.getDate()).slice(-2),
  m = ("0"+date.getMonth()).slice(-2),
  y = date.getFullYear(),
  h = ('0' + date.getHours()).slice(-2),
  m = ('0' + date.getMinutes()).slice(-2),
  
alert( d+"."+m+"."+y+" "+h+":"+m );

var date = new Date(Date.now()-20031),
  options = {
    year: 'numeric',
    month: 'numeric',
    day: 'numeric',
    timezone: 'UTC',
    hour: 'numeric',
    minute: 'numeric',
  };
 
alert( date.toLocaleString("ru", options) );

s = ('0' + date.getSeconds()).slice(-2);

var oldData = document.querySelector('#oldData'),
    g = document.querySelector('#oldData + input'),
    m = document.querySelector('#oldData + input + input'),
    d = document.querySelector('#oldData + input + input + input'),
    newData = document.querySelector('#oldData + input + input + input + output');
 
oldData.value = new Date().toJSON().slice(0,10);
newData.value = new Date().toJSON().slice(0,10);
 
window.oninput = function() {
  var D = new Date(oldData.value);
  D.setFullYear(D.getFullYear() + parseFloat(g.value), D.getMonth() + parseFloat(m.value), D.getDate() + parseFloat(d.value));
  newData.innerHTML = D.toJSON().slice(0,10);
}

var date = new Date(Date.now()-86340),
  options = {
    year: 'numeric',
    month: 'numeric',
    day: 'numeric',
    timezone: 'UTC',
    hour: 'numeric',
    minute: 'numeric',
  };
 
alert( date.toLocaleString("ru", options) );

var date = new Date(Date.now()-86340000)

var date = new Date();
var  d = date.getDate();
var  m = date.getMonth();
var  y = date.getFullYear();
var  h = date.getHours();
var  min = date.getMinutes();
var  s = date.getSeconds();
 
var z=d+"-"+m+"-"+y+"-"+h+"-"+min+"-"+s;
alert(z);