function CalculateNewDate() {

    DaysInFuture = 365; // change this according to your preference

    var now = new Date();
    var newDate = new Date();
    var newTimeMS=newDate.getTime()+(DaysInFuture*24*60*60*1000);

    newDate.setTime(newTimeMS);
    
    var months = new Array ("January","February","March","April","May","June","July","August","September","October","November","December");
    var weekdays = new Array ("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday");

    var dd = newDate.getDate();
    var D = newDate.getDay();
	var mmm = newDate.getMonth();
	var yyyy = newDate.getFullYear();
    
    futureDate = weekdays[D] + ', ' + months[mmm] + ' ' + dd + ', ' + yyyy;

    document.writeln(futureDate);
    
}

CalculateNewDate();