Set min time for <ion-datetime>

I have question about ion-datetime . I create a ion-datetime for pick time and i would like disable time pass

        <ion-datetime
          min="?????????"
          (ionChange)="onChangeStartTime()"
          minuteValues="0,5,10,15,20,25,30,35,40,45,50,55"
          displayFormat="hh:mm A"
          pickerFormat="h mm A"
          placeholder="-"
          formControlName="start_time"
        ></ion-datetime>

What should I fill in the question mark for disable time pass. thanks for reading my question.

You can set a min time like this

<ion-datetime
  hourValues="08,09,10,11,12,13,14,15,16,17,18,19,20"
  (ionChange)="onChangeStartTime()"
  minuteValues="0,5,10,15,20,25,30,35,40,45,50,55"
  displayFormat="hh:mm A"
  pickerFormat="h mm A"
  placeholder="-"
  formControlName="start_time"
></ion-datetime>