Edit Countdown.js

Như tiêu đề, các bác hướng dẫn thay đổi ngày tháng trong code này với ạ

Mã:

(function($) {
  $.fn.countdown = function(options, callback) {

  //custom 'this' selector
  var thisEl = $(this);

  //array of custom settings
  var settings = {
  'date': null,
  'format': null
  };

  //append the settings array to options
  if(options) {
  $.extend(settings, options);
  }
   
  //main countdown function
  function countdown_proc() {
   
  var eventDate = Date.parse(settings['date']) / 1000;
  var currentDate = Math.floor($.now() / 1000);
   
  if(eventDate <= currentDate) {
  callback.call(this);
  clearInterval(interval);
  }
   
  var seconds = eventDate - currentDate;
   
  var days = Math.floor(seconds / (60 * 60 * 24)); //calculate the number of days
  seconds -= days * 60 * 60 * 24; //update the seconds variable with no. of days removed
   
  var hours = Math.floor(seconds / (60 * 60));
  seconds -= hours * 60 * 60; //update the seconds variable with no. of hours removed
   
  var minutes = Math.floor(seconds / 60);
  seconds -= minutes * 60; //update the seconds variable with no. of minutes removed
   
  //conditional Ss
  if (days == 1) { thisEl.find(".timeRefDays").text("day"); } else { thisEl.find(".timeRefDays").text("days"); }
  if (hours == 1) { thisEl.find(".timeRefHours").text("hour"); } else { thisEl.find(".timeRefHours").text("hours"); }
  if (minutes == 1) { thisEl.find(".timeRefMinutes").text("minute"); } else { thisEl.find(".timeRefMinutes").text("minutes"); }
  if (seconds == 1) { thisEl.find(".timeRefSeconds").text("second"); } else { thisEl.find(".timeRefSeconds").text("seconds"); }
   
  //logic for the two_digits ON setting
  if(settings['format'] == "on") {
  days = (String(days).length >= 2) ? days : "0" + days;
  hours = (String(hours).length >= 2) ? hours : "0" + hours;
  minutes = (String(minutes).length >= 2) ? minutes : "0" + minutes;
  seconds = (String(seconds).length >= 2) ? seconds : "0" + seconds;
  }
   
  //update the countdown's html values.
  if(!isNaN(eventDate)) {
  thisEl.find(".days").text(days);
  thisEl.find(".hours").text(hours);
  thisEl.find(".minutes").text(minutes);
  thisEl.find(".seconds").text(seconds);
  } else {
  alert("Invalid date. Here's an example: 12 Tuesday 2012 17:30:00");
  clearInterval(interval);
  }
  }
   
  //run the function
  countdown_proc();
   
  //loop the function
  interval = setInterval(countdown_proc, 1000);
   
  }
}) (jQuery);