Date.getDay() javascript returns wrong day

Hi I'm new in javascript I have such javascript code

alert(DATE.value);
var d = new Date(DATE.value);
var year = d.getFullYear();
var month = d.getMonth();
var day = d.getDay();
alert(month);
alert(day);
if(2012 < year < 1971 | 1 > month+1 > 12 | 0 >day > 31){
    alert(errorDate);
    DATE.focus();
    return false;
}

take for instance: DATE.value = "11/11/1991"

when I call alert(day); it shows me 3;
when I call alert(d); it is returns me correct info.

Solution 1:

use .getDate instead of .getDay.

The value returned by getDay is an integer corresponding to the day of the week: 0 for Sunday, 1 for Monday, 2 for Tuesday, and so on.

Solution 2:

getDay() returns the day of the week. You can however use the getDate() method.

https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Date/getDay

Solution 3:

getDay() will give you the day of the week. You are looking for getDate().

Solution 4:

I had a similar problem. date.getMonth() returns an index ranging from 0 to 11. January is 0. If you create a new date()-object and you want to get information about a costum date not the current one you have to decrease only the month by 1.

Like this:

function getDayName () {
var year = 2016;
var month = 4;
var day = 11;

var date = new Date(year, month-1, day);
var weekday = new Array("sunday", "monday", "tuesday", "wednesday",
                    "thursday", "friday", "saturday");

return weekday[date.getDay()];
}