(function () {
  var yearEl = document.querySelector('[data-year]');
  if (!yearEl) return;

  var startYear = parseInt(yearEl.getAttribute('data-year'), 10);
  var currentYear = new Date().getFullYear();

  if (!isNaN(startYear) && currentYear > startYear) {
    yearEl.textContent = startYear + '\u2013' + currentYear;
  } else {
    yearEl.textContent = String(currentYear);
  }
})();