legend on day list

src/app/features/administration/form/date/list/day/day-list.component.html

@@ -1,6 +1,7 @@
 <div class="day-list-container">
 	<div class="days-list" [ngClass]="{ 'colored-weekend-days': environment.enable_colored_weekend_days }">
 		<fieldset class="date-choice-container has-no-border" *ngFor="let choice of dateChoices; index as id">
+			<legend class="sr-only">{{ 'dates.element' | translate }} {{ id + 1 }}</legend>
 			<div class="date-choice" [ngClass]="{ 'day-weekend': isWeekendDay(choice.date_input) }">
 				<div class="top">
 					<label class="pull-left" for="dateChoices_{{ id }}" [attr.aria-describedby]="'format-date-' + id">