Reciber un numero del 1 al 7 y que respondacon un dia de la semana

function whatDayIs(day) {
  day = parseInt(day)
  switch (day) {
    case 1:
      return "Monday";
      break;
    case 2:
      return "Tuesday";
      break;
    case 3:
      return "Wednesday";
      break;
    case 4:
      return "Thursday";
      break;
    case 5:
      return "Friday";
      break;
    case 6:
      return "Saturday";
      break;
    case 7:
      return "Sunday";
      break;
    default:
      return "Wrong Day";
      break;
  }
}