Timestamp to human readable format

getDay() returns the day of the week. To get the date, use date.getDate(). getMonth() retrieves the month, but month is zero based, so using getMonth() + 1 should give you the right month. Time value seems to be ok here, albeit the hour is 23 here (GMT+1). If you want universal values, add UTC to the methods (e.g. date.getUTCFullYear(), date.getUTCHours())

const timestamp = 1301090400;
const date = new Date(timestamp * 1000);
const datevalues = [
   date.getFullYear(),
   date.getMonth()+1,
   date.getDate(),
   date.getHours(),
   date.getMinutes(),
   date.getSeconds(),
];
alert(datevalues); //=> [2011, 3, 25, 23, 0, 0]

Here is a small helper idea to retrieve values of a given Date:

const dateHelper = dateHelperFactory();
const formatMe = date => {
  const vals = `yyyy,mm,dd,hh,mmi,ss,mms`.split(`,`);
  const myDate = dateHelper(date).toArr(...vals);
  return `${myDate.slice(0, 3).join(`/`)} ${
    myDate.slice(3, 6).join(`:`)}.${
    myDate.slice(-1)[0]}`;
};

// to a formatted date with zero padded values
console.log(formatMe(new Date(1301090400 * 1000)));

// the raw values
console.log(dateHelper(new Date(1301090400 * 1000)).values);

function dateHelperFactory() {
  const padZero = (val, len = 2) => `${val}`.padStart(len, `0`);
  const setValues = date => {
    let vals = {
       yyyy: date.getFullYear(),
       m: date.getMonth()+1,
       d: date.getDate(),
       h: date.getHours(),
       mi: date.getMinutes(),
       s: date.getSeconds(),
       ms: date.getMilliseconds(), };
    Object.keys(vals).filter(k => k !== `yyyy`).forEach(k => 
      vals[k[0]+k] = padZero(vals[k], k === `ms` && 3 || 2) );
    return vals;
  };
  
  return date => ( {
    values: setValues(date),
    toArr(...items) { return items.map(i => this.values[i]); },
  } );
}
.as-console-wrapper {
    max-height: 100% !important;
}

Or see this small stackblitz project (a little bit more efficient).

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