Question

$(document).ready(function(){

    var date = new Date();
    var d = date.getDate();
    var m = date.getMonth();
    var y = date.getFullYear();

    var month = new array("January","February","March","April","May","June","July","August","September","October","November","December");

    var mon;
    mon = month(m);

    var today = m+"/"+d+"/"+y
    $('#calendar').append('<div id="today">Today is'+' '+mon+'/'+d+'/'+y+'.');

});

Answer 1

Instead of mon = month(m); use square bracket notation: mon = month[m]; and new array() should be new Array() or better yet, use an array literal, like ['First','Second','Third']

$(document).ready(function(){

    var date = new Date();
    var d = date.getDate();
    var m = date.getMonth();
    var y = date.getFullYear();

    var month = ["January","February","March","April","May","June","July","August","September","October","November","December"];

    var mon;
    mon = month[m];

    var today = m+"/"+d+"/"+y
    $('#calendar').append('<div id="today">Today is'+' '+mon+'/'+d+'/'+y+'.');

});