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Compare a date in string format with todays date

I know this has been asked before but I can't get it to work due to my date format, which I can't change. Any help would be appreciated.
My date is in this format;
4/11/2017 12:30 PM.
If I inspect it in the developer tools it shows it as
4/11/2017 12:30 PM EDIT: Won't show with prepended space here
i.e. with a space in front, not sure if that's relevant.
Does anyone know if it's possible or how to compare it with today's date to see if it's in the past or future?
I've tried tinkering with the following code but can't get it to work because of the time, PM, and forward slashes.
var q = new Date();
var m = q.getMonth();
var d = q.getDate();
var y = q.getFullYear();
var date = new Date(d,m,y);
mydate=new Date('13/04/2017');
console.log(date);
console.log(mydate)
if(date>mydate)
{
alert("greater");
}
else
{
alert("smaller")
}

If you have dates that are in the same format of something like 13/04/2017, you could split the string based on the slashes and compare the values starting from the right moving left.
By this, I mean when you have your array of three values for each date, you could first compare the year, if that's the same, move on to comparing the month, if that's the same then on to comparing the day.
But if for instance one of the year's is 2018 while the other is 2016, you would immediately know that the 2018 one comes later.
var st = "19/05/2019";
var st2 = "19/05/2019";
function provideLaterDate(date1, date2) {
var splitDateDate1 = date1.split("/").reverse();
var splitDateDate2 = date2.split("/").reverse();
var laterDate = false;
splitDateDate1.forEach(function(val, idx, arr) {
if ( laterDate === false ) {
if ( val > splitDateDate2[idx] ) {
laterDate = splitDateDate1;
} else if ( val < splitDateDate2[idx]) {
laterDate = splitDateDate2;
} else {
laterDate = "Both are the same";
}
}
});
if ( /\//.test(laterDate) ) {
return laterDate.reverse().join("/");
} else {
return laterDate;
}
}
To get rid of the "time pm" part, you could simply do something like:
// Assuming your date has a structure like this: 4/11/2017 12:30 PM.
var newDate = unformattedDate.split(" ")[0];
// This will separate your date string by spaces, and since there are no spaces until after the year in your date, the 0 index will give you the date minus the time and pm portion. Please pardon the not-consistent variable names.

The problem was with the way you were constructing date. Construct date like this var mydate = new Date(2017, 04, 03); and it works.
var q = new Date();
var m = q.getMonth();
var d = q.getDate();
var y = q.getFullYear();
var date = new Date(d, m, y);
var mydate = new Date(2017, 04, 03);
console.log(date);
console.log(mydate)
if (date > mydate) {
alert("greater");
}
else {
alert("smaller")
}

You can split the date. Be aware you should contruct your date as follows:
var date = new Date(y,m,d);
Means year first, then month and finally day, as you can see under https://www.w3schools.com/jsref/jsref_obj_date.asp
You can use the following code to perform what you want:
var q = new Date();
var m = q.getMonth();
var d = q.getDate();
var y = q.getFullYear();
var date = new Date(y,m,d);
newdate = '13/04/2017'
array = newdate.split('/');
var d1 = array[0]
var m1 = array[1]-1
var y1 = array[2]
mydate = new Date(y1,m1,d1);
console.log(date);
console.log(mydate)
if(date>mydate)
{
alert("greater");
}
else
{
alert("smaller")
}
You can always check the date created is correct by using the date.toString() function. Be aware 0=January for month as you can check under https://www.w3schools.com/jsref/jsref_getmonth.asp. That's why I added the -1 for var m1.

Problem:
It's not working because you are comparing a date with an Invalid date, it will always return false.
Explanation:
And the Invalid date comes from the line new Date('13/04/2017'), because 13 is expected to be a month number and not a day which is an invalid month, because the new Date(stringDate) will be treated as a local Date and not a UTC date by the browser, and it depends on which browser you are using.
You can see in the JavaScript Date Specification that:
parsing of date strings with the Date constructor (and Date.parse, they are equivalent) is strongly discouraged due to browser differences and inconsistencies. Support for RFC 2822 format strings is by convention only. Support for ISO 8601 formats differs in that date-only strings (e.g. "1970-01-01") are treated as UTC, not local.
Demo:
So if we change new Date('13/04/2017') to new Date('04/13/2017') the code will work as expected:
var date = new Date();
var mydate = new Date('04/13/2017');
console.log(date);
console.log(mydate)
if (date > mydate) {
alert("greater");
} else {
alert("smaller")
}

if(date.getTime()>mydate.getTime()){
alert("greater");
}
else if (date.getTime()==mydate.getTime){
alert("simmilar");
else {alert("smaller");}

Get Month as well as date in my variable - javascript

Hi i am trying to do a IF statement which allows the current date to be compared to the input date.. if the input date is below the current date it will be false.
I have got the date passing through my variable but it only stores the number so for example it compares day 9 to another day, which is not very reliable. I want the variable to take in the month and the year as well, meaning it can compare the ENTIRE DATE.
If there is a better way let me know.
Here is my code
if (this.element.find('#visitdate').length > 0) {
var dateParts = $('#visitdate').val().split('/');
var check = new Date(dateParts[2], dateParts[1], dateParts[0], 0,0,0,0).getDate();
var today = new Date().getDate;
if (check < today) {
_errMsg = "Please enter a furture visit date";
return false;
} else {
return true;
}
}

Your line for today's date contains an error:
var today = new Date().getDate;
should be
var today = new Date().getDate();

format as mm/dd/yyyy
var from = '08/19/2013 00:00'
var to = '08/12/2013 00:00 '
var today = new Date().getDate();
function isFromBiggerThanTo(dtmfrom, dtmto){
var from = new Date(dtmfrom).getTime();
var to = new Date(dtmto).getTime() ;
return from >= to ;
}
or using below
var x = new Date('2013-05-23');
var y = new Date('2013-05-23');
and compare

You can try this - it's working fine in my project -
Step 1
First Create javascript function as below.
Date.prototype.DaysBetween = function () {
var intMilDay = 24 * 60 * 60 * 1000;
var intMilDif = arguments[0] - this;
var intDays = Math.floor(intMilDif / intMilDay);
if (intDays.toLocaleString() == "NaN") {
return 0;
}
else {
return intDays + 1;
}
}
Step 2
-
var check = new Date(dateParts[2], dateParts[1], dateParts[0], 0,0,0,0).getDate();
var today = new Date().getDate;
var dateDiff = check .DaysBetween(today);
// it will return integer value (difference between two dates )
if(dateDiff > 0 ){ alert('Your message.......');}

You can have this much easier.
You dont need to check with getDate() property you can just compare 2 dates.
And also is not needed to initialize with hours, minutes and seconds the Date, you only need year, month and date.
Here you have your example simplified
var dateParts = $('#visitdate').val().split('/');
var check = new Date(dateParts[2], dateParts[1], dateParts[0]);
var today = new Date();
if (check < today) {
return false;
} else {
return true;
}
http://jsfiddle.net/wns3LkLv/

Try this:
var user="09/09/2014/5/30";
var arrdt= user.split("/");
var userdt = new Date(arrdt[2], arrdt[1] - 1, arrdt[0],arrdt[3],arrdt[4]);
var currdt = new Date();
if (userdt < currdt) {
alert("userdate is before current date"); //do something
}else{
alert("userdate is after current date"); //do something
}

Thanks for all your answers guys i have fixed it.
I used the getTime function instead of getDate.
Then the check variable had to have a -1 assigned to the month as it was going 1 month to high.
var check = new Date(dateParts[2], dateParts[1]-1, dateParts[0], 0,0,0,0).getTime();
Cheers

check date if today and return whether today or normal date

I'm using bootstrap plugin as datepicker, I wrote a function to check whether it's today or not using pure js..
nothing happen, I wonder why.. the datepicker value is in format like dd/mm/yyyy
var datepicker = $('#datepicker').val();
checkToday(datepicker);
function checkToday(datepicker){
datepickerDay = datepicker.slice(0, datepicker.indexOf('/'));
var d = new Date();
var dToday = d.getDate() ;
dToday.toString();
if(datepickerDay == dToday){
return "Today"
alert('Today');
}
else{
return datepicker;
alert(datepicker);
}
}

Don't use parseInt Also you can't put anything after the return
var datepicker = $('#datepicker').val();
function checkToday(datepicker) {
datepickerDay = datepicker.slice(0, datepicker.indexOf('/'));
var d = new Date();
var dToday = d.getDate();
dToday.toString();
if (datepickerDay == dToday) {
return "Today";
} else {
return datepicker;
}
}
alert(checkToday(datepicker));
WORKING DEMO

You van convert both the dates in dates format then compare by date, month and year.
try this
function checkToday(datepicker){
var datepickerDay = new Date(datepicker); //creating date object from string 'mm/dd/yyyy'
var d = new Date(); // date object
// now lets comapare date, Month and year to get correct result
if(d.getDate()==datepicker.getDate() && d.getMonth()==datepicker.getMonth() && d.getYear()==datepicker.getYear()){
return "Today"
alert('Today');
}
else{
return datepicker;
alert(datepicker);
}
}
Hope this helps...

Add days to date format yyyy-mm-dd

The question is simple, how can I add days to a date in YYYY-MM-DD format?
For example, increment a date given in this format: "2013-02-11" to "2013-02-12"?

date = new Date('2013-02-11');
next_date = new Date(date.setDate(date.getDate() + 1));
here's a demo http://jsfiddle.net/MEptb/

Hope below code will helpful to you
function addDays(myDate,days) {
return new Date(myDate.getTime() + days*24*60*60*1000);
}
var myDate = new Date('2013-02-11');
var newDate = addDays(myDate,5);

Something like this :
var date = new Date('2013-02-11');
/* Add nr of days*/
date.setDate(date.getDate() + 1);
alert(date.toString());
I hope it helps.

Below function is to Add number of days to today's Date
It returns the Incremented Date in YYYY-MM-DD format
#param noofDays - Specify number of days to increment. 365, for 1 year.
function addDaysToCurrentDate(noofDays){
date = new Date();
next_date = new Date(date.setDate(date.getDate() + noofDays));
var IncrementedDate = next_date.toISOString().slice(0, 10);
console.log("Incremented Date " +IncrementedDate );
return IncrementedDate;
}

With the date parameter you can add your required date and you can add days with the addDays() function:
var start_date = new Date('2013-02-11');
var next_date_update = addDays(start_date,1);
var next_date = new Date(next_date_update).toLocaleDateString('en-CA');
if(next_date!='Invalid Date')
{
var final_date = next_date;
console.log(final_date);
}
function addDays ( myDate , days)
{
return new Date(myDate.getTime() + days*24*60*60*1000);
}
hope it will help you out

Compare two dates in JavaScript

I am trying to compare two dates. I have this code which I thought would work a treat, but it didn't. For now I just want to alert with an error if the end date is less than the start date. The date style, yyyy-mm-dd, needs to be kept in this format for other events prior to this. What is wrong with this code?
startdate = "2009-11-01" ;
enddate = "2009-11-04" ;
var d1 = new Date(startdate)
var d2 = new Date(enddate)
if (d2 < d1) {
alert ("Error ! ) ;
}
document.cookie='st =' + startdate // set sytem cookie
document.cookie='en =' + enddate
window.location = self.location.href
window.opener.location.reload()
close()

Try using DateJS, an open-source JavaScript Date Library that can handle pretty much everything! The following example is working:
<script type="text/javascript" src="date.js"></script>
<script>
startdate = "2009-11-01";
enddate = "2009-11-04";
var d1 = Date.parse(startdate);
var d2 = Date.parse(enddate) ;
if (d1 < d2) {
alert ("Error!");
}
</script>

Someone finally uses ISO 8601 standard dates but then ...
You are using a nice international standard that JavaScript arguably should understand. But it doesn't.
The problem is that your dates are in ISO 8601 standard format which the built-in Date.parse() can't read.
JavaScript implements the older IETF dates from RFC 822/1123. One solution is to tweak them into the RFC-style, which you can see in RFC1123, and which look like dd month yyyy.
There is coding floating about that can scan the ISO format comprehensively, and now that you know to google for "iso standard date" you can get it. Over here I found this:
Date.prototype.setISO8601 = function (string) {
var regexp = "([0-9]{4})(-([0-9]{2})(-([0-9]{2})" +
"(T([0-9]{2}):([0-9]{2})(:([0-9]{2})(\.([0-9]+))?)?" +
"(Z|(([-+])([0-9]{2}):([0-9]{2})))?)?)?)?";
var d = string.match(new RegExp(regexp));
var offset = 0;
var date = new Date(d[1], 0, 1);
if (d[3]) { date.setMonth(d[3] - 1); }
if (d[5]) { date.setDate(d[5]); }
if (d[7]) { date.setHours(d[7]); }
if (d[8]) { date.setMinutes(d[8]); }
if (d[10]) { date.setSeconds(d[10]); }
if (d[12]) { date.setMilliseconds(Number("0." + d[12]) * 1000); }
if (d[14]) {
offset = (Number(d[16]) * 60) + Number(d[17]);
offset *= ((d[15] == '-') ? 1 : -1);
}
offset -= date.getTimezoneOffset();
time = (Number(date) + (offset * 60 * 1000));
this.setTime(Number(time));
}
js> t = new Date()
Sun Nov 01 2009 09:48:41 GMT-0800 (PST)
js> t.setISO8601("2009-11-01")
js> t
Sat Oct 31 2009 17:00:00 GMT-0700 (PDT)
The 11-01 is reinterpreted in my timezone, as long as all your dates get the same conversion then they should compare reasonably, otherwise you can add TZ info to your string or to the Date object.

The Date constructor cannot parse that format, and since you cannot change it, you should parse it manually, and pass the year, month and date parts to it, for example:
function compareDates(startDate, endDate) {
// parse a date in yyyy-mm-dd format
function parseDate(input) {
var parts = input.match(/(\d+)/g);
return new Date(parts[0], parts[1]-1, parts[2]); // months are 0-based
}
if (parseDate(endDate) < parseDate(startDate)) {
alert ("Error !");
}
}
Usage:
var startDate = "2009-11-01",
endDate = "2009-11-04";
compareDates(startDate, endDate);

var myDate=new Date();
myDate.setFullYear(2010,0,14);
var today = new Date();
if (myDate>today)
{
alert("Today is before 14th January 2010");
}
else
{
alert("Today is after 14th January 2010");
}
source: http://www.w3schools.com/jS/js_obj_date.asp

If you only need to know if one date comes before the other, you could just use the Date object's getTime() method to compare their respective numbers of milliseconds since midnight Jan 1, 1970:
if( d2.getTime() < d1.getTime() )
{
alert("eeeek!");
}
--- Don't get mixed up and try to use getMilliseconds(), though :)
w3schools documentation on getTime()

USe this function for date comparison in javascript:
function fn_DateCompare(DateA, DateB) {
var a = new Date(DateA);
var b = new Date(DateB);
var msDateA = Date.UTC(a.getFullYear(), a.getMonth()+1, a.getDate());
var msDateB = Date.UTC(b.getFullYear(), b.getMonth()+1, b.getDate());
if (parseFloat(msDateA) < parseFloat(msDateB))
return -1; // less than
else if (parseFloat(msDateA) == parseFloat(msDateB))
return 0; // equal
else if (parseFloat(msDateA) > parseFloat(msDateB))
return 1; // greater than
else
return null; // error
}

I implemented the below code for a date comparison depending on current time - -
// get the current time from a hidden input which is being set by server time
// because client may have a wrong time
var ch = jQuery('#clockHours').val(); // e.g. 9,10 etc.
ch = parseInt(ch);
// get the today's date from a server value as well
var td = jQuery('#clockDate').val(); // may be => new Date(); e.g. 2014-05-15
td = Date.parse(td);
td.setHours(0, 0, 0, 0);
// get the input date
var inpdate = jQuery('#jform_in_date').val(); // may be => new Date(); e.g. 2014-05-15
inpdate = Date.parse(inpdate);
inpdate.setHours(0, 0, 0, 0);
// get yesterday's date. this is from server as well
yd = new Date();
yd.setFullYear(td.getFullYear(), td.getMonth(), td.getDate()-1);
yd.setHours(0, 0, 0, 0);
alert('today\'s date is: '+td.toString());
alert('yesterday\'s date is: '+yd.toString());
// if it is not 10 AM then dates from yesterday are valid
if(ch <= 9) {
if(inpdate.getTime() >= yd.getTime()) {
alert('Valid: dates from yesterday are allowed');
} else {
alert('Invalid: dates before yesterday are not allowed');
}
} else {
if(inpdate.getTime() >= td.getTime()) {
alert('Valid: dates from today are allowed');
} else {
alert('Invalid: dates before today are not allowed');
}
}
I hope this will help very clearly.