title: Datepicker previous/next month dates selectable
body: <p>I want to show the dates of previous and next months on my datePicker. Just like this:</p>
  
  <p><img src="https://i.stack.imgur.com/ecidF.png" alt="enter image description here"></p>
  
  <p>These dates should also be selectable. Is there any option in jQuery default datePicker or can I modify DatePicker to look like this?</p>