Why does my code output the number of the names parameter instead the weekday name. Date object!

Question

function main() {
var year = parseInt(readLine(), 10);
var month = parseInt(readLine(), 10);
var day = parseInt(readLine(), 10);

console.log(getWeekDay(year, month, day));
}

function getWeekDay(year, month, day) {
var names = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
var d = new Date(year, month, day);
this.name = names;

return getWeekDay = d.getDay([this.name])
//complete the functio
}

Answer 1

function getWeekDay( year, month, day )
{
var names = [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ];
var d = new Date( year, month - 1, day );
return names[ d.getDay() ];
}