Why not write a function to get bits of the date for you and return an Object which lets you build a string as easily as string concatenation of Object properties.
The example below will always base answer on UTC time
var easyDate = (function () {
    var days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
        months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
        thstndrd = ['th', 'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th'];
    return function (d) {
        var dow = d.getUTCDay(),
            dom = d.getUTCDate(),
            moy = d.getUTCMonth(),
            y = d.getUTCFullYear(),
            h = d.getUTCHours(),
            m = d.getUTCMinutes(),
            s = d.getUTCSeconds();
        return {
            dom: '' + dom,
            th: thstndrd[dom % 10],
            day: days[dow],
            moy: '' + (moy + 1),
            month: months[moy],
            year: '' + y,
            ampm: h < 12 ? 'a.m.' : 'p.m.',
            hh: h < 10 ? '0' + h : '' + h,
            sh: '' + (h % 12 || 12),
            mm: m < 10 ? '0' + m : '' + m,
            ss: s < 10 ? '0' + s : '' + s,
        };
    };
}());
var o = easyDate(new Date());
// Object {dom: "2", th: "nd", day: "Sunday", moy: "6", month: "June"…}
o.month + ' ' + o.dom + ', ' + o.sh + ':' + o.mm + ' ' + o.ampm;
// "June 2, 8:43 p.m."