如何设置在datetimepicker中突出显示的默认时间？

我有一个datetimepicker，我需要将默认时间设置为始终为8 AM。如果用户单击datetimepicker，则突出显示的默认时间应为8AM。用户可以相应地更改时间。



我尝试过：

I have a datetimepicker and I need to set the default time to be always 8 AM. If a user clicks on the datetimepicker, the default time highlighted should be 8AM. User can change the time accordingly.

What I have tried:

$('#SPA_SD_START_DT').datetimepicker({
       step: 30,
       format: 'Y/m/d H:i',
       defaultDate: "",
       ignoreReadonly: true,
       minDate: new Date(),
       setDate:mindate()

   });
  function mindate(){
       var mindte = new Date(new Date().setHours(8, 00, 00));
       return mindte;
   }