How bootstrap-datetimepicker displays only dates

recently encountered such a problem when using bootstrap datatimepicker

/ / instantiate time control and configure Chinese display

        $(".form_datetime").datetimepicker({
            viewSelect: "month", // 
            language: "zh-CN",
            todayBtn: true,
            autoclose: true
        });

Why is it set in this way, and the interface can still display the option of hours?

clipboard.png
how to select only dates

Nov.09,2021

$('-sharpdatetimepicker').datetimepicker({
    format: 'yyyy-mm-dd'
});
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