Malaysia Indentification Card Number to Birthdate

Birthdate Parser.js

var ic = '090303086521';

if(ic.match(/^(\d{2})(\d{2})(\d{2})-?\d{2}-?\d{4}$/)) {
    var year = RegExp.$1;
    var month = RegExp.$2;
    var day = RegExp.$3;
    console.log(year, month, day);
    
    var now = new Date().getFullYear().toString();

    var decade = now.substr(0, 2);
    if (now.substr(2,2) > year) {
        year = parseInt(decade.concat(year.toString()), 10);
    }

    var date = new Date(year, (month - 1), day, 0, 0, 0, 0);
    console.log(date);
}
else {
    // not a proper IC format
}