convert epoch (unix) timestamp to a readable format (node.js)

node.js_epoch_timestamp.js

/*
* Convert the epoch (unix) timestamp to a readable format.
*/
function formatDateTime(epochTimeStamp, callback) {
  var d = new Date(epochTimeStamp * 1000);
  var months = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
  var year = d.getFullYear();
  var month = months[d.getMonth()];
  var date = d.getDate();
  var hour = d.getHours();
  var min = (d.getMinutes() < 10 ? '0' : '') + d.getMinutes();
  var sec = (d.getSeconds() < 10 ? '0' : '') + d.getSeconds();
  var time = date + '. ' + month + ' ' + year + ' ' + hour + ':' + min + ':' + sec ;
  callback(time);
}