Given a date in dd/mm/year format returns the date in month day, year format

Talking Calender

const talkingCalendar = function(date) {
  //assign the year
  let year = date.substring(0,4);
  let month;
  let day;
  //determine the month
  switch (date.substring(5,7)){
    case '01':
      month = 'January';
      break;
    case '02':
      month = 'February';
      break;
    case '03':
      month = 'March';
      break;
    case '04':
      month = 'April';
      break;
    case '05':
      month = 'May';
      break;
    case '06':
      month = 'June';
      break;
    case '07':
      month = 'July';
      break;
    case '08':
      month = 'August';
      break;
    case '09':
      month = 'September';
      break;
    case '10':
      month = 'October';
      break;
    case '11':
      month = 'November';
      break;
    case '12':
      month = 'December';
  }
  //determine the day
  switch (date.substring(9,10)){
    case '1':
      day = `${date.substring(8,10)}st`;
      break;
    case '2':
      day = `${date.substring(8,10)}nd`;
      break;
    case '3':
      day = `${date.substring(8,10)}rd`;
      break;
    default:
      day = `${date.substring(8,10)}th`;
  }
  //remove 0 if day is between 1 to 9
  if (day[0] === '0'){
    day = day.substring(1);
  }
  return `${month} ${day}, ${year}`;
};