JSFiddle - React, Tailwind, and code Playground

HTML

<div id="output">
  
</div>

JavaScript

function write_date(date){
  var month = date.substring(0, 2),
      day 	= date.substring(3, 5),
      year  = date.substring(6, 11),
      month_written = "";

  switch(month){
    case "01":
      month_written = "Jan";
      break;
    case "02":
      month_written = "Feb";
      break;
    case "03":
      month_written = "March";
      break;
    case "04":
      month_written = "Apr";
      break;
    case "05":
      month_written = "May";
      break;
    case "06":
      month_written = "Jun";
      break;
    case "07":
      month_written = "Jul";
      break;
    case "08":
      month_written = "Agu";
      break;
    case "09":
      month_written = "Sel";
      break;
    case "10":
      month_written = "Oct";
      break;
    case "11":
      month_written = "Nov";
      break;
    case "12":
      month_written = "Dec";
      break;
  }

  return month_written + " " + day + ", " + year + " " + date.substring(11, 20);
}

var date = "06/15/2017 02:45 PM";
document.getElementById("output").innerHTML = write_date(date);