Issue #3273363 by EthanT, johnv: Accessibility warnings by missing labels in Widget table cells

    // Override (hide) the 'day' select-field.

    $element['day'] = [

      '#type' => 'hidden',

      '#prefix' => $day_delta

        ? "<div class='office-hours-more-label'>$label</div>"

        : "<div class='office-hours-label'>$label</div>",

      // For accessibility (a11y) screen readers, a header/title is introduced.

      '#title' => $label,

      '#type' => 'item',

      '#default_value' => $day,

      '#value' => $day,

    ];