日期差异大于预期

Question

我正在学习在Javascript中使用Date对象。尝试计算现在和某个设置日期之间的差异，但它返回的值比 inted 大得多。代码笔在这里，我似乎无法弄清楚我做错了什么......帮助？

var setdate = new Date(2014, 4, 27, 14,30); //27th of April this year at 14:30
var now = new Date(); //Now, whenever this code runs
var diff = Math.round((setdate.getTime() - now.getTime())/1000); //Difference in seconds
function NiceTimer(delta) { //Decompose the difference in seconds into date units.
  this.days = Math.floor(delta/ 86400);
  delta -= this.days*86400; //Subtract the value once it has been "extracted".
  this.hours = Math.floor(delta/ 3600);
  delta -= this.hours*3600;
  this.minutes = Math.floor(delta/ 60);
  delta -= this.minutes*60;
  this.seconds = delta;
  this.printString = function() {
    return "The event starts in "+this.days+" days, "+this.hours+" hours, "+this.minutes+" minutes and "+this.seconds+" seconds"; //Output a readable countdown string
  }
}
var timer = new NiceTimer(diff);
var el = document.getElementById("timer");
el.innerHTML = timer.printString();

Answer 1

var setdate = new Date(2014, 4, 27, 14,30); //27th of April this year at 14:30

将四个更改为三个，从索引零开始。

var setdate = new Date(2014, 3, 27, 14,30);

日期 @ MDN：

月 表示月份的整数值，从 0 表示 1 月开始，到 11 表示 12 月。