[JavaScript] Numbers, Dates, Intl, and Timers - Internationalizing Dates (Intl)

const account1 = {
  owner: 'Jonas Schmedtmann',
  movements: [200, 455.23, -306.5, 25000, -642.21, -133.9, 79.97, 1300],
  interestRate: 1.2, // %
  pin: 1111,

  movementsDates: [
    '2019-11-18T21:31:17.178Z',
    '2019-12-23T07:42:02.383Z',
    '2020-01-28T09:15:04.904Z',
    '2020-04-01T10:17:24.185Z',
    '2020-05-08T14:11:59.604Z',
    '2022-07-11T17:01:17.194Z',
    '2022-07-14T23:36:17.929Z',
    '2022-07-17T10:51:36.790Z',
  ],
  currency: 'EUR',
  locale: 'pt-PT', // de-DE
};

// Create current date and time after log in
    const now = new Date();
    const options = {
      hour: 'numeric',
      minute: 'numeric',
      day: 'numeric',
      month: 'numeric', // also available 'long' or '2-digit'. Those display another format of month. ex) 3, 03 for march.
      year: 'numeric', // also available '2-digit'
      // weekday: 'numeric', // available 'short', 'numeric', 'long'...
    };
    // const locale = navigator.language; // for automated update by user's browser
    // console.log(locale);

    labelDate.textContent = new Intl.DateTimeFormat(
      currentAccount.locale,
      options
    ).format(now); // ('Language-Country'), 'en-US' - USA, 'en-GB' - England, 'ko-KR' - Korea...

// Display Movements with Internationalized time
const formatMovementsDates = function (date, locale) {
  const calcDaysPassed = (date1, date2) =>
    Math.round(Math.abs(date2 - date1) / (1000 * 60 * 60 * 24));

  const daysPassed = calcDaysPassed(new Date(), date);

  if (daysPassed === 0) return 'Today';
  if (daysPassed === 1) return 'Yesterday';
  if (daysPassed <= 7) return `${daysPassed} days ago`;
  else {
    // const month = `${date.getMonth() + 1}`.padStart(2, 0);
    // const day = `${date.getDate()}`.padStart(2, 0);
    // const year = date.getFullYear();
    // return `${month}/${day}/${year}`;
    return new Intl.DateTimeFormat(locale).format(date);
  }
};

const displayMovements = function (acc, sort = false) {
  containerMovements.innerHTML = '';

  const movs = sort
    ? acc.movements.slice().sort((a, b) => a - b)
    : acc.movements;

  movs.forEach(function (mov, i) {
    const type = mov > 0 ? 'deposit' : 'withdrawal';

    const date = new Date(acc.movementsDates[i]);
    const displayDate = formatMovementsDates(date, acc.locale);

    const html = `
      <div class="movements__row">
        <div class="movements__type movements__type--${type}">${
      i + 1
    } ${type}</div>
        <div class="movements__date">${displayDate}</div>
        <div class="movements__value">${mov.toFixed(2)}€</div>
      </div>
    `;

    containerMovements.insertAdjacentHTML('afterbegin', html);
  });
};

• US

• England

• Korea

• Syria