Four part date control without visible names

What it sounds like

Event date group, Day, 1, combo box

Every form control needs a name (visible or not), and every group of controls needs a name (visible or not). We can visually hide the legend and add aria-label attributes to

What it looks like

Event date

<fieldset>
  <legend class="visuallyhidden">Event date</legend>

  <select aria-label="Day" id="event-date-day" name="event-date-day">
    <option>1</option>
    <option>etc</option>
  </select>

  <select aria-label="Month" id="event-date-month" name="event-date-month">
    <option>January</option>
    <option>etc</option>
  </select>

  <select aria-label="Year" id="event-date-year" name="event-date-year">
    <option>2020</option>
    <option>etc</option>
  </select>

  <select
    aria-label="Timezone"
    id="event-date-timezone"
    name="event-date-timezone"
  >
    <option value="12.0">(GMT +12:00) Wellington</option>
    <option>etc</option>
  </select>
</fieldset>