Question: I am using **jquery datepicker** to select a date and convert to timestamp (epoch time). The script works arbitrarily. It shows timestamp for dates from 1st to 12th of any chosen month but makes time 12:00am of those days (I converted it online). But from 13th to the end of the month it shows **NAN** as timestamp. Strange enough when the date formated to dd/mm/yy all the days shows correctly.

```
$(function() {
    $("#datepicker").datepicker({dateFormat: 'dd-mm-yy',
        onSelect: function(dateText, inst) {
              var dtV = $(this).val();
              var d = new Date(dtV);
              var s = parseInt((d)/1000);
              $("#selectedDate").text("on " + dateText + "");
              $(".selectedDate2").text(s.valueOf());
        }
    });
});

```

Answer: 
I had a similar problem: usually the datepicker worked properly, also for dates with the day after the 12th; but from time to time I saw in Google Analytics that a user was getting **NaN-NaN-NaN**.

After investigating, I discovered that it could be [due to Google Translate](https://forum.jquery.com/topic/nan-nan-nan-with-jquery-datepicker-google-translate).

I checked in my analytics the language of the users getting the error. Almost all of them had a language that my website did not support. That was enough to assume that Google Translator was causing the error.

To solve it, as explained [here](https://stackoverflow.com/a/17130585/5802289), add the `notranslate` class:

```
$(function() {
    $(".datepicker").datepicker();
    $('.ui-datepicker').addClass('notranslate');
});

```
When you call `new Date()`you have to pass a valid date. `dd-mm-yy` is not a valid date for `Date`and it's chenging your month per day.

If you cannot change your date format, try this:

```
onSelect: function(dateText, inst) {
    var dtV = $(this).val();
    var exploded=dtV.split("-");
    var d = new Date(exploded[2],exploded[1],exploded[0]);

```

**EDIT**: Better and shorter, use datepicker's `getDate` to get a `Date` object:

```
onSelect: function(dateText, inst) {
    var d = $(this).datepicker("getDate");

```

<http://jsfiddle.net/9WMvk/>