function pad2(n: number): string {
  return String(n).padStart(2, "0");
}

function formatDate(iso: string): string {
  const d = new Date(iso);
  return `${d.getFullYear()}/${d.getMonth() + 1}/${d.getDate()}`;
}

export function formatTime(iso: string): string {
  const d = new Date(iso);
  return `${pad2(d.getHours())}:${pad2(d.getMinutes())}`;
}

export function formatDateTime(iso: string): string {
  return `${formatDate(iso)} ${formatTime(iso)}`;
}