Default date format of Javascript/Jquery

I have a kendo date picker which is set to format date as "MM/dd/yyyy". I want to check using jquery/javascript that if kendo date picker date must not be future date and date must be greater than '01/01/1900'.

The issue I am facing is when I take new date in script, it is like Date {Tue Jun 10 2014 11:17:48 GMT+0530 (India Standard Time)}. and my kendo date picker has value in 06/02/2012 format. I don't know how to compare it.

I know a method in kendo date picker named: parseFormats in which I have to give parsing format, but I don't know defualt date format of Javascript/Jquery and I don't know how to do it.

Kendo Date Picker

@(Html.Kendo().DatePickerFor(m => m.DateOfBirth).Format("MM/dd/yyyy").HtmlAttributes(new { style = "width:100%", Placeholder = "mm/dd/yyyy" }).Max(DateTime.Now.Date).Min(new DateTime(1900, 1, 2).Date))

You are getting the toString value of the new Date. Try this

var d = new Date(datepicker.value()); // looked at the docs, no obvious shortcut
if (d.getFullYear()<1900) alert("nope");

or

var now = new Date(), d = new Date(datepicker.value());
now.setHours(0,0,0,0); // normalise
if (d.getTime() > now.getTime()) alert("Please no future dates");

More information about JS Dates: MDN

You can also make it harder to select the invalid dates

$("#datetimepicker").kendoDateTimePicker({
  value:new Date(),
  min: new Date(1900,0,1), // JS months are 0 based!
  max: new Date()
});

And lastly add the validation

$("#MyForm").kendoValidator({
  rules: {
    //implement your custom date validation
    dateValidation: function (dateField) {
        var currentDate = Date.parse($(dateField).val());
        //Check if Date parse is successful
        if (!currentDate) {
            return false;
        }

        var now = new Date(), then=new Date(1900,0,1),d = new Date($(dateField).val());
        now.setHours(0,0,0,0); // normalise
        return d.getTime() >= then.getTime() && d.getTime() < now.getTime()  
    }
  },
  messages: {
    //Define your custom validation massages
    required: "Date is required message",
    dateValidation: "Invalid date message"
  }
});