Try with this FIDDLE

var d = new Date();

var getTot = daysInMonth(d.getMonth(),d.getFullYear()); //Get total days in a month

var sat = new Array();   //Declaring array for inserting Saturdays

var sun = new Array();   //Declaring array for inserting Sundays



for(var i=1;i<=getTot;i++){    //looping through days in month

    var newDate = new Date(d.getFullYear(),d.getMonth(),i)

    if(newDate.getDay()==0){   //if Sunday

        sun.push(i);

    }

    if(newDate.getDay()==6){   //if Saturday

        sat.push(i);

    }



}

console.log(sat);

console.log(sun);





function daysInMonth(month,year) {

    return new Date(year, month, 0).getDate();

}

In sat and sun Array() you can get the Saturdays and Sundays of particular month