title: MS-Excel, change default custom formatting?
body: <p>If you enter 20/11 into a cell excel automatically applies a default custom format to 20-Nov (dd-mmm) on the cell.</p>
  
  <p>How does one prevent this default behaviour from happening or modify it to yyyy/mm/dd <strong>without</strong> manually formatting cells?</p>
  
  <p>Thanks</p>