IE Date.Parse() returns NaN

Question

I am trying to parse this string

"2017-06-01 11:22:20.683"

It is working just fine in Firefox, but return NaN in IE 11
Unfortunately I am unable to modify the source string since its coming from a legacy system.

function myFunction() {
    var d = Date.parse("2017-06-01 11:22:20.683");
    document.getElementById("demo").innerHTML = d;
}

<p id="demo"></p>
<button onclick="myFunction()">Try it</button>

Maybe its because its not [ISO8601](https://en.wikipedia.org/wiki/ISO_8601) compliant. Try `"2017-06-01T11:22:20.683"` instead. — Igor, Jun 01 '17 at 18:06
Of course you can modify the string, you have it in javascript and can do anything you want to it. To say otherwise is just nonsense. — gforce301, Jun 01 '17 at 18:09
cannot modify the source date format, but I can code js/jquery around it to parse it in other ways... — JavaSheriff, Jun 01 '17 at 18:09
unfortunately JavaScript dates are a little wonky in some browsers: officially it needs to support ISO8601 (and i think RFC2822 is by convention) [Source: MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date), but non-standard formats tend to be browser dependent, as @Dorival mentioned below [MomentJS](https://momentjs.com/) is very commonly used instead of the built in Date because it offers a standard way to represent Datetimes cross browser, and it supports more formats than Date does (it's also pretty good at guessing given a non-standard format) — Patrick Barr, Jun 01 '17 at 18:21

score 2 · Accepted Answer · answered Jun 01 '17 at 18:23

2

Here is the simpliest solution:

function myFunction(dateString) {
    var str = dateString.replace(/^(.*-[0-9][0-9])(\ )([0-9][0-9]\:.*$)/, '$1T$3')
    var d = Date.parse(str);
    document.getElementById("demo").innerHTML = d;
}

answered Jun 01 '17 at 18:23

Oleg Imanilov

2,591
1
13
26

score 1 · Answer 2 · answered Jun 01 '17 at 18:09

Unfortunately this API is not quite reliable. Edge still gives you a NaN. You have two options though:

1) Use an external library called MomentJS. Very easy to use and have all corner cases implemented. (http://momentjs.com/docs/)

2) Refer to this question to parse it manually: Why does Date.parse give incorrect results?

Hope that helps

Kamlesh · Answer 3 · 2020-01-16T07:54:01.367

1

Please do not replace the '-' with '/', use whitespace instead.

var str = "15-Dec-2019 05:25:45 PM ";
console.log( Date.parse( str.replace(/-/g, ' ') ) );

This worked for me in Chrome and Firefox browsers, i hope, this will help you also.

edited Jan 16 '20 at 07:54

answered Jan 16 '20 at 06:13

Kamlesh

5,233
39
50

output will be 1576410945000 in console panel of browser. – Kamlesh Jan 16 '20 at 06:15

score -1 · Answer 4 · answered Apr 05 '19 at 06:59

-1

/// Below example will work in All Browser including IE
<script>
 var selected_date = '2019,Apr,05'; // You need to change date format like this
 var parsing_date = Date.parse(selected_date.replace(/^(.*-[0-9][0-9])(\ )([0-9][0-9]\:.*$)/, '$1T$3'));
 alert(parsing_date); 
</script>

answered Apr 05 '19 at 06:59

Rutvik kakadiya

89
4

This question already has an accepted answer (almost) identical to this. – SimonC Apr 05 '19 at 07:25

IE Date.Parse() returns NaN

4 Answers4