export function calculateAge(start: Date, end = new Date()) {
  if (start.getTime() > end.getTime()) return;

  let year = end.getFullYear() - start.getFullYear();
  let month = end.getMonth() - start.getMonth();
  let day = end.getDate() - start.getDate();

  if (month < 0) year -= 1;
  if (month < 0) month += 12;
  if (day < 0) {
    month -= 1;
    day =
      new Date(start.getFullYear(), start.getMonth(), 0).getDate() -
      start.getDate() +
      end.getDate();
  }

  return { year, month, day };
}