gistfile1.txt

Date.prototype.prettyPrint = function () {
    return ['Jan.', 'Feb.', 'Mar.', 
            'Apr.', 'May', 'Jun.',
            'Jul.', 'Aug.', 'Sep.', 
            'Oct.', 'Nov.', 'Dec.'][this.getMonth()] + " " +
            (function (d) { 
                var s = d.toString(), l = s[s.length-1];
                return s+(['st','nd','rd'][l-1] || 'th');
            })(this.getDate()) + ", " +
            this.getFullYear() + " " +
            this.getHours() + ":" + ("0" + this.getMinutes()).slice(-2);
}

Usage: (new Date()).prettyPrint();