govuk-frontend/dist/govuk/components/date-input/template-day-and-month.html

GOV.UK Frontend contains the code you need to start building a user interface for government platforms and services.

<div class="govuk-form-group">
  <fieldset class="govuk-fieldset" role="group" aria-describedby="bday-hint">
    <legend class="govuk-fieldset__legend">
      What is your birthday?
    </legend>
    <div id="bday-hint" class="govuk-hint">
      For example, 5 12
    </div>
    <div class="govuk-date-input" id="bday">
      <div class="govuk-date-input__item">
        <div class="govuk-form-group">
          <label class="govuk-label govuk-date-input__label" for="bday-day">
            Day
          </label>
          <input class="govuk-input govuk-date-input__input govuk-input--width-2" id="bday-day" name="bday-day" type="text" inputmode="numeric">
        </div>
      </div>
      <div class="govuk-date-input__item">
        <div class="govuk-form-group">
          <label class="govuk-label govuk-date-input__label" for="bday-month">
            Month
          </label>
          <input class="govuk-input govuk-date-input__input govuk-input--width-2" id="bday-month" name="bday-month" type="text" inputmode="numeric">
        </div>
      </div>
    </div>
  </fieldset>
</div>