Datum und Zeit

var ts = Date.now() / 1000 | 0;

function set_date_time() {
  const months = ['Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober',	'November', 'Dezember'];
  const days = ['Sonntag', 'Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag'];
  const add0 = t => t < 10 ? `0${t}` : String(t);
  const dt = new Date();
  const y = dt.getFullYear() - 2000;
  const yy = dt.getFullYear();
  const m = add0(dt.getMonth() + 1);
  const d = add0(dt.getDate()); //day of month
  const h = add0(dt.getHours());
  const i = add0(dt.getMinutes());
  const s = add0(dt.getSeconds());
  const wd = days[dt.getDay()];
  const mo = months[dt.getMonth()];	
 
  const dtstr = `${wd}, ${d}.${m}.${y} / ${h}:${i}`;
 
  document.getElementById('js-current-date').innerHTML = dtstr;
}