How to sort the datetime field in datatable plugin

Question

I'm used to sort the date and time field in datatable plugin.but it not working it sort in the order of 9,8,7,...12,11,10. If I'm use some custom code for sorting I works but it is not sorting for some data's

Custom code:

HTML and JS

<td><?=  $date ? $date : '-' ?></td>

jQuery.fn.dataTableExt.oSort['uk_date-pre'] = function(a) {
var a = a.split('m')[0];
a=a+'m';
a = a.slice(0, -2) + ' ' + a.slice(-2);
var date = Date.parse(a);
return typeof date === 'number' ? date : -1;
}

datatable:

$('#id').DataTable({
    "paging": true,
    "ordering": true,
    "aoColumns": [
       { "bSortable": false },  
       { sType: 'uk_date' },
       null
    ],
    "order": [[0, 'desc']],
});

Answer 1

Finally i got the answer thanks you for all for your comments

jQuery.fn.dataTableExt.oSort['uk_date-pre'] = function(a) {
var a = a.split('m')[0];
if(a == '-'){
        return -1;
    }
a=a+'m';
a = a.slice(0, -2) + ' ' + a.slice(-2);
var date = Date.parse(a);
return typeof date === 'number' ? date : -1;
}