Sort the datatable table by the date of the records

I have a code, which when starting, creates a table using dataTable . The data in this table comes from my MySQL database. I am not sure how my records are sorted, if I am not mistaken it is coming from the Id, but I need it to be sorted by the Date of each record.

In MySQL and the codeigniter model (which I'm using) I know how to do, but when not using dataTable . With him, I do not know how. My code as I said before is in CodeIgniter .

The part that makes this table looks like this:

var oTable = $('#tabletools').dataTable({
        "sProcessing": '<?= $this->lang->line("datatable_process"); ?>',
        "bProcessing": true,
        "bServerSide": true,
        "bAutoWidth": true,
        "sAjaxSource": "<?php echo base_url() . $caminho; ?>",
        "fnDrawCallback": function (oSettings) {
            $("td:nth-child(1)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(1)").addClass('hidden-md hidden-sm hidden-xs');
            $("td:nth-child(4)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(4)").addClass('hidden-md hidden-sm hidden-xs');
            $("td:nth-child(5)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(5)").addClass('hidden-md hidden-sm hidden-xs');
            $("td:nth-child(6)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(6)").addClass('hidden-md hidden-sm hidden-xs');
            $("td:nth-child(7)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(7)").addClass('hidden-md hidden-sm hidden-xs');
            $("[rel=tooltip]").tooltip();
        },
        "oLanguage": {
            "sProcessing": "<?= $this->lang->line("datatable_process"); ?>",
            "sZeroRecords": "<?= $this->lang->line("datatable_records"); ?>",
            "sInfo": "<?= $this->lang->line("datatable_info"); ?>",
            "sInfoEmpty": "<?= $this->lang->line("datatable_empty"); ?>",
            "sInfoFiltered": "<?= $this->lang->line("datatable_filter"); ?>",
            "sInfoPostFix": "",
            "sUrl": "",
            "oPaginate": {
                "sFirst": "<?= $this->lang->line("datatable_first"); ?>",
                "sPrevious": "<?= $this->lang->line("datatable_previous"); ?>",
                "sNext": "<?= $this->lang->line("datatable_next"); ?>",
                "sLast": "<?= $this->lang->line("datatable_last"); ?>"
            }
        },
        "fnInitComplete": function (oSettings, json) {
            $(this).closest('#dt_table_tools_wrapper').find('.DTTT.btn-group').addClass('table_tools_group').children('a.btn').each(function () {
                $(this).addClass('btn-sm btn-default');
            });
            $("td:nth-child(1)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(1)").addClass('hidden-md hidden-sm hidden-xs');
            $("td:nth-child(4)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(4)").addClass('hidden-md hidden-sm hidden-xs');
            $("td:nth-child(5)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(5)").addClass('hidden-md hidden-sm hidden-xs');
            $("td:nth-child(6)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(6)").addClass('hidden-md hidden-sm hidden-xs');
            $("td:nth-child(7)").addClass('hidden-md hidden-sm hidden-xs');
            $("th:nth-child(7)").addClass('hidden-md hidden-sm hidden-xs');
        },
        'fnServerData': function (sSource, aoData, fnCallback) {
            aoData.push({name: '<?= $this->security->get_csrf_token_name() ?>', value: '<?= $this->security->get_csrf_hash() ?>'});
            aoData.push({name: "sSearch_1", value: iMin});
            aoData.push({name: "sSearch_2", value: iMax});
            $.ajax
                    ({
                        'dataType': 'json',
                        'type': 'POST',
                        'url': sSource,
                        'data': aoData,
                        'success': fnCallback
                    });

        }
    });