title: Sort a Tableviews sections in Swift 4 by a date that is in that array
body: <p>I need to create sections based on the date from one array and add the components that match into the array in order to display it like so: e.g </p>
  
  <p>Array = [Mary's Birthday, Date(Dec 25th)], [Tom's Birthday, Date(Dec 25th)], [Like's Birthday, Date(Dec 24th)], [Jane's Birthday, Date(Dec 24th)]</p>
  
  <p><em>Dec 24th - Section</em></p>
  
  <p>Jane's Birthday - Cell</p>
  
  <p><em>Dec 25th - Section</em></p>
  
  <p>Mary's Birthday - Cell</p>
  
  <p>Junes Birthday- Cell</p>