Sorting XML results by date using jQuery

I am having a lot of trouble sorting my returned XML data by date. The dates are stored as YYYY-MM-DD. I'm struggling to find any help online for this specific date format.

Here is my js:

$(document).ready(function () {
    $.ajax({
        type: "GET",
        url: "database.xml",
        dataType: "xml",
        success: function (xml) {
            $(xml).find("event").filter(function () {
                return $(this).find("eventplace").text() == 'NEWCASTLE';
            }).each(function () {
                var title = $(this).find('eventname').text();
                var venue = $(this).find('eventvenue').text();
                var city = $(this).find('eventplace').text();
                var date = $(this).find('eventdate').text();
                $('<div class="items">' + title + '</div>').html(title + venue + city + date).appendTo('#comingup');
            });
        }
    });
});

and here is a sample of my XML:

<Root_Element>
<eventserie>
    <event>
        <eventname>LITTLE COMETS</eventname>
        <eventvenue>O2 ACADEMY</eventvenue>
        <eventplace>NEWCASTLE</eventplace>
        <eventdate>2014-02-21</eventvdate>
    </event>
    <event>
        <eventname>SYMPHONIC PICTURES</eventname>
        <eventvenue>THE CLUNY</eventvenue>
        <eventplace>NEWCASTLE</eventplace>
        <eventdate>2014-03-10</eventvdate>
    </event>
    <event>
        <eventname>LET'S BUY HAPPINESS</eventname>
        <eventvenue>THINK TANK</eventvenue>
        <eventplace>NEWCASTLE</eventplace>
        <eventdate>2014-02-10</eventvdate>
    </event>
</eventserie></Root_Element>

Store the timestamp in a data attribute, and the elements in an array, then sort the array based on the timestamps before appending the elements :

$(document).ready(function () {
    $.ajax({
        type: "GET",
        url: "database.xml",
        dataType: "xml",
        success: function (xml) {

            var items = [];

            $(xml).find("event").filter(function () {
                return $(this).find("eventplace").text() == 'NEWCASTLE';
            }).each(function () {
                var title = $(this).find('eventname').text();
                var venue = $(this).find('eventvenue').text();
                var city = $(this).find('eventplace').text();
                var date = $(this).find('eventdate').text();

                items.push(
                    $('<div />', {
                        'class'  : 'items',
                        text     : title + venue + city + date,
                        'data-d' : new Date(date).getTime()
                    })
                );
            });

            items.sort(function(a, b) {
               return $(a).data('d').localeCompare( $(b).data('d') );
            });

            $.each(items, function(idx, itm) { 
                $('#comingup').append(itm); 
            });
        }
    });
});