我数据里面的日期格式是datetime类型的，为什么显示出来是这样种格式“Wed Jul 04 19:21:49 CST 2018”？？？，转换不过来

<div class="form-group">
                            <label for="releaseDate" class="col-sm-2 control-label">发布时间</label>
                            <div class="col-sm-8 input-group date form_datetime " style="padding-left: 16px;padding-right: 16px;" data-date="1979-09-16T05:25:07Z" data-date-format="dd MM yyyy - HH:ii p" data-link-field="releaseDate">
                                <input type="text" size="16" readonly class="form-control" value="${obj.releaseDate}" data-parsley-required="true">
                                <span class="input-group-addon"><span class="glyphicon glyphicon-remove"></span></span>
                                <span class="input-group-addon"><span class="glyphicon glyphicon-th"></span></span>
                            </div>
                            <input type="hidden" id="releaseDate" name="releaseDate" value="${obj.releaseDate}" />
                        </div>


$('.form_datetime').datetimepicker({
            language:  'zh-CN',
            format:'yyyy-mm-dd hh:ii:ss',
            weekStart: 1,
            todayBtn:  1,
            autoclose: 1,
            todayHighlight: 1,
            startView: 2,
            forceParse: 0,
            showMeridian: 1
        });