<DateField
  label="Date Field"
  format="M/D/YYYY"
  defaultValue={dayjs('2022-04-17')}
  shouldRespectLeadingZeros
/>
<DatePicker
  label="Date Picker"
  format="M/D/YYYY"
  defaultValue={dayjs('2022-04-17')}
  slotProps={{ field: { shouldRespectLeadingZeros: true } }}
/>