<Grid>
  <DateTimePicker
    renderInput={(params) => <TextField {...params} />}
    label='공구 시작일'
    value={startDt}
    onChange={(newValue) => {
      setStartDt(format(newValue, 'yyyy-MM-dd hh:mm:ss'))
    }}
    inputFormat='yyyy-MM-dd hh:mm a'
  />
</Grid>

I try to get the time value using the material Ui, but AM and PM are not working. Only AM is brought ex) PM 11:11 -> AM 11:11 is automatically changed. I don't know what the problem is.

I clicked PM, but value is only AM: