嗨，这是我比较日期的代码。在我的情况下，我正在检查是否允许选择过去的日期。

var myPickupDate = <pick up date> ;
var isPastPickupDateSelected = false;
var currentDate = new Date();

if(currentDate.getFullYear() <= myPickupDate.getFullYear()){
    if(currentDate.getMonth()+1 <= myPickupDate.getMonth()+1 || currentDate.getFullYear() < myPickupDate.getFullYear()){
                        if(currentDate.getDate() <= myPickupDate.getDate() || currentDate.getMonth()+1 < myPickupDate.getMonth()+1 || currentDate.getFullYear() < myPickupDate.getFullYear()){
                                            isPastPickupDateSelected = false;
                                            return;
                                        }
                    }
}
console.log("cannot select past pickup date");
isPastPickupDateSelected = true;

我通常将日期作为时间戳（数字）存储在数据库中。

当我需要比较时，我只需在这些时间戳或

将其转换为Date Object，然后根据需要与><进行比较。

请注意，==或==无法正常工作，除非变量是同一日期对象的引用。

首先将这些Date对象转换为时间戳（数字），然后比较它们的相等性。

日期到时间戳

var timestamp_1970 = new Date(0).getTime(); // 1970-01-01 00:00:00
var timestamp = new Date().getTime(); // Current Timestamp

截至日期的时间戳

var timestamp = 0; // 1970-01-01 00:00:00
var DateObject = new Date(timestamp);

var date = new Date(); // will give you todays date.

// following calls, will let you set new dates.
setDate()   
setFullYear()   
setHours()  
setMilliseconds()   
setMinutes()    
setMonth()  
setSeconds()    
setTime()

var yesterday = new Date();
yesterday.setDate(...date info here);

if(date>yesterday)  // will compare dates

您可以使用以下代码：

var firstValue = "2012-05-12".split('-');
var secondValue = "2014-07-12".split('-');

 var firstDate=new Date();
 firstDate.setFullYear(firstValue[0],(firstValue[1] - 1 ),firstValue[2]);

 var secondDate=new Date();
 secondDate.setFullYear(secondValue[0],(secondValue[1] - 1 ),secondValue[2]);     

  if (firstDate > secondDate)
  {
   alert("First Date  is greater than Second Date");
  }
 else
  {
    alert("Second Date  is greater than First Date");
  }

还要检查Date类的MDN文章。

简短的回答

下面是一个函数，如果from dateTime>to dateTime Demo在操作中，则返回｛boolean｝

var from = '08/19/2013 00:00'
var to = '08/12/2013 00:00 '

function isFromBiggerThanTo(dtmfrom, dtmto){
   return new Date(dtmfrom).getTime() >=  new Date(dtmto).getTime() ;
}
console.log(isFromBiggerThanTo(from, to)); //true

解释

jsFiddle公司

var date_one = '2013-07-29 01:50:00',
date_two = '2013-07-29 02:50:00';
//getTime() returns the number of milliseconds since 01.01.1970.
var timeStamp_date_one = new Date(date_one).getTime() ; //1375077000000 
console.log(typeof timeStamp_date_one);//number 
var timeStamp_date_two = new Date(date_two).getTime() ;//1375080600000 
console.log(typeof timeStamp_date_two);//number 

因为您现在的日期时间都是数字类型您可以将它们与任何比较操作进行比较

（>，<，=，！=，==，！==，>=和<=）

Then

如果您熟悉C#自定义日期和时间格式字符串，这个库应该做完全相同的事情，并帮助您格式化日期和时间dtmFRM，无论您传递的是日期时间字符串还是unix格式

用法

var myDateTime = new dtmFRM();

alert(myDateTime.ToString(1375077000000, "MM/dd/yyyy hh:mm:ss ampm"));
//07/29/2013 01:50:00 AM

alert(myDateTime.ToString(1375077000000,"the year is yyyy and the day is dddd"));
//this year is 2013 and the day is Monday

alert(myDateTime.ToString('1/21/2014', "this month is MMMM and the day is dd"));
//this month is january and the day is 21

DEMO

您所要做的就是传递库js文件中包含的任何格式

function datesEqual(a, b)
{
   return (!(a>b || b>a))
}